diff --git a/src/app/dashboard/plant/equipment/page.tsx b/src/app/dashboard/plant/equipment/page.tsx
index 84a4f78..9246219 100644
--- a/src/app/dashboard/plant/equipment/page.tsx
+++ b/src/app/dashboard/plant/equipment/page.tsx
@@ -1,4 +1,5 @@
 import { pbAdmin } from "@/lib/pb";
+import { composeFilter, filterOpt, getSiteScope, siteFilter, type SearchParams } from "@/lib/site-scope";
 import {
   PlantView,
   type PlantRow,
@@ -9,7 +10,13 @@ import type { PlantSiteOption } from "@/components/add-plant-button";
 
 export const dynamic = "force-dynamic";
 
-export default async function PlantPage() {
+export default async function PlantPage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>;
+}) {
+  const scope = await getSiteScope(await searchParams);
+  const siteF = siteFilter(scope);
   const pb = await pbAdmin();
 
   // Plant bucket includes legacy empty-unit-type rows. The fuel page
@@ -18,16 +25,17 @@ export default async function PlantPage() {
   const [allVehicles, allFuelLogs, allSites] = await Promise.all([
     pb.collection("vehicles").getFullList({
       sort: "description",
-      perPage: 5000,
-      filter: `unit_type="plant" || unit_type="" || unit_type=null`,
+      filter: composeFilter(siteF, `unit_type="plant" || unit_type="" || unit_type=null`),
     }),
     pb.collection("fuel_logs").getFullList({
       sort: "-date_logged",
-      perPage: 5000,
+      ...filterOpt(siteF),
     }),
+    // Sites is a lookup table for project_code display, not a data
+    // read — left unfiltered so the Add-plant dialog can still show
+    // every site even when this page is scoped.
     pb.collection("sites").getFullList({
       sort: "project_code",
-      perPage: 5000,
       fields: "id,project_code,name",
     }),
   ]);
@@ -145,7 +153,7 @@ export default async function PlantPage() {
       };
     });
 
-  const projectCodes = Array.from(new Set(rows.map((r) => r.projectCode))).sort();
+  const projectCodes: string[] = []; // Project column visibility is controlled by showSiteColumn; the list is now derived server-side.
 
   const sites: PlantSiteOption[] = allSites.map((s) => ({
     id: s.id,
@@ -179,6 +187,7 @@ export default async function PlantPage() {
       logs={logs}
       projectCodes={projectCodes}
       sites={sites}
+      showSiteColumn={scope.mode === "all"}
       kpis={kpis}
       vehicleBasePath="/dashboard/plant/equipment"
       title="Equipment (L/h)"
diff --git a/src/app/dashboard/plant/equipment/plant-view.tsx b/src/app/dashboard/plant/equipment/plant-view.tsx
index 47c4cc3..7981567 100644
--- a/src/app/dashboard/plant/equipment/plant-view.tsx
+++ b/src/app/dashboard/plant/equipment/plant-view.tsx
@@ -135,6 +135,7 @@ export function PlantView({
   logs,
   projectCodes,
   sites,
+  showSiteColumn,
   kpis,
   vehicleBasePath,
   title,
@@ -144,13 +145,13 @@ export function PlantView({
   logs: PlantLogRow[];
   projectCodes: string[];
   sites: PlantSiteOption[];
+  showSiteColumn: boolean;
   kpis: PlantKpis;
   vehicleBasePath: string;
   title: string;
   subtitle?: string;
 }) {
   const router = useRouter();
-  const [projectFilter, setProjectFilter] = React.useState<string>("all");
   const [search, setSearch] = React.useState("");
   const [page, setPage] = React.useState(1);
   // Independent pagination for the bottom "Plant log entries" table.
@@ -184,15 +185,14 @@ export function PlantView({
     const q = search.trim().toLowerCase();
     return rows.filter((r) => {
       if (removedIds.has(r.id)) return false;
-      if (projectFilter !== "all" && r.projectCode !== projectFilter) return false;
       if (q && !r.description.toLowerCase().includes(q)) return false;
       return true;
     });
-  }, [rows, projectFilter, search, removedIds]);
+  }, [rows, search, removedIds]);
 
   React.useEffect(() => {
     setPage(1);
-  }, [projectFilter, search]);
+  }, [search]);
 
   const pageCount = Math.max(1, Math.ceil(filtered.length / PAGE_SIZE));
   const pageRows = React.useMemo(
@@ -249,7 +249,7 @@ export function PlantView({
     }
   }
 
-  const filtersActive = projectFilter !== "all" || search !== "";
+  const filtersActive = search !== "";
 
   // Inline-edit hook for the description column. The page-level toggle
   // controls this state via the EditModeToggle rendered in the Topbar.
@@ -392,31 +392,11 @@ export function PlantView({
               />
             </div>
 
-            <div className="flex items-center gap-1.5">
-              <span className="flex items-center gap-1 text-xs text-muted-foreground">
-                <Filter className="h-3.5 w-3.5" /> Project
-              </span>
-              <Select value={projectFilter} onValueChange={setProjectFilter}>
-                <SelectTrigger className="w-[160px]">
-                  <SelectValue />
-                </SelectTrigger>
-                <SelectContent>
-                  <SelectItem value="all">All projects</SelectItem>
-                  {projectCodes.map((c) => (
-                    <SelectItem key={c} value={c}>
-                      {c}
-                    </SelectItem>
-                  ))}
-                </SelectContent>
-              </Select>
-            </div>
-
             {filtersActive && (
               <Button
                 variant="ghost"
                 size="sm"
                 onClick={() => {
-                  setProjectFilter("all");
                   setSearch("");
                 }}
               >
@@ -461,6 +441,7 @@ export function PlantView({
                         }}
                         onDelete={edit.editing ? () => void handleDelete(r) : null}
                         deleting={deletingId === r.id}
+                        showSiteColumn={showSiteColumn}
                       />
                     </li>
                   ))}
@@ -472,7 +453,7 @@ export function PlantView({
                       <TableRow>
                         <TableHead>Description</TableHead>
                         <TableHead>QR code</TableHead>
-                        <TableHead>Project</TableHead>
+                        {showSiteColumn && <TableHead>Project</TableHead>}
                         <TableHead className="text-right">Hours</TableHead>
                         <TableHead className="text-right">Value</TableHead>
                         <TableHead className="text-right">Logs</TableHead>
@@ -545,11 +526,13 @@ export function PlantView({
                                 <span className="text-xs text-muted-foreground">—</span>
                               )}
                             </TableCell>
-                            <TableCell>
-                              <Badge variant="outline" className="font-mono text-xs">
-                                {r.projectCode || "—"}
-                              </Badge>
-                            </TableCell>
+                            {showSiteColumn && (
+                              <TableCell>
+                                <Badge variant="outline" className="font-mono text-xs">
+                                  {r.projectCode || "—"}
+                                </Badge>
+                              </TableCell>
+                            )}
                             <TableCell className="text-right tabular-nums">
                               {r.totalHours > 0
                                 ? `${formatNumber(r.totalHours, { maximumFractionDigits: 1 })} h`
@@ -647,7 +630,7 @@ export function PlantView({
                   <TableRow>
                     <TableHead>Date</TableHead>
                     <TableHead>Vehicle</TableHead>
-                    <TableHead>Project</TableHead>
+                    {showSiteColumn && <TableHead>Project</TableHead>}
                     <TableHead className="text-right">Hour meter</TableHead>
                     <TableHead className="text-right">Hours</TableHead>
                     <TableHead className="text-right">Fuel (L)</TableHead>
@@ -667,11 +650,13 @@ export function PlantView({
                       <TableCell>
                         <div className="font-medium">{l.vehicleDescription}</div>
                       </TableCell>
-                      <TableCell>
-                        <Badge variant="outline" className="font-mono text-xs">
-                          {l.projectCode || "—"}
-                        </Badge>
-                      </TableCell>
+                      {showSiteColumn && (
+                        <TableCell>
+                          <Badge variant="outline" className="font-mono text-xs">
+                            {l.projectCode || "—"}
+                          </Badge>
+                        </TableCell>
+                      )}
                       <TableCell className="text-right tabular-nums">
                         {formatNumber(l.odoReading)}
                       </TableCell>
@@ -834,6 +819,7 @@ function PlantMobileCard({
   edit,
   onDelete,
   deleting,
+  showSiteColumn,
 }: {
   r: PlantRow;
   href: string;
@@ -847,6 +833,7 @@ function PlantMobileCard({
   };
   onDelete: (() => void) | null;
   deleting: boolean;
+  showSiteColumn: boolean;
 }) {
   return (
     <div
@@ -894,9 +881,11 @@ function PlantMobileCard({
       </div>
       <div className="flex items-center justify-between gap-2 text-xs text-muted-foreground">
         <div className="flex min-w-0 flex-wrap items-center gap-1.5">
-          <Badge variant="outline" className="font-mono text-[10px]">
-            {r.projectCode || "—"}
-          </Badge>
+          {showSiteColumn && (
+            <Badge variant="outline" className="font-mono text-[10px]">
+              {r.projectCode || "—"}
+            </Badge>
+          )}
           {r.qrCodeId && (
             <span className="font-mono text-[10px]">QR {r.qrCodeId}</span>
           )}
diff --git a/src/app/dashboard/plant/fuel-logs/page.tsx b/src/app/dashboard/plant/fuel-logs/page.tsx
index 414b1fc..b176051 100644
--- a/src/app/dashboard/plant/fuel-logs/page.tsx
+++ b/src/app/dashboard/plant/fuel-logs/page.tsx
@@ -3,23 +3,38 @@ import { Topbar } from "@/components/layout/sidebar";
 import { ImportFuelLogsButton } from "@/components/import-fuel-logs-button";
 import { resolveFuelPrice } from "@/lib/metrics";
 import { loadFuelPrices } from "@/lib/fuel-prices";
+import { filterOpt, getSiteScope, siteFilter, siteFilterAllowingUnassigned, type SearchParams } from "@/lib/site-scope";
 import { FuelLogsView, type FuelLogRow } from "./fuel-logs-view";
 import { deriveProjectPeriodLabel } from "@/lib/project-calendar";
 
 export const dynamic = "force-dynamic";
 
-export default async function FuelLogsPage() {
+export default async function FuelLogsPage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>;
+}) {
+  const scope = await getSiteScope(await searchParams);
+  const siteF = siteFilter(scope);
   const pb = await pbAdmin();
 
   const [logs, vehicles, sites, documents] = await Promise.all([
     pb.collection("fuel_logs").getFullList({
       sort: "-date_logged",
       expand: "vehicle,fuel_sheet",
+      ...filterOpt(siteF),
     }),
     pb.collection("vehicles").getFullList(),
+    // Sites is a lookup / Sites dropdown data — kept unfiltered.
     pb.collection("sites").getFullList({ sort: "name" }),
     pb.collection("fuel_sheets").getFullList({
       fields: "id,processing_status",
+      ...filterOpt(
+        // A pump sheet legitimately spans sites and carries site="" by
+        // design (src/lib/pb-types.ts:353-358). A plain siteFilter would
+        // make every multi-site sheet vanish from upload status.
+        siteFilterAllowingUnassigned(scope),
+      ),
     }),
   ]);
 
diff --git a/src/app/dashboard/plant/page.tsx b/src/app/dashboard/plant/page.tsx
index 1089f33..9786bf8 100644
--- a/src/app/dashboard/plant/page.tsx
+++ b/src/app/dashboard/plant/page.tsx
@@ -12,19 +12,27 @@ import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
 import { loadFuelPrices } from "@/lib/fuel-prices";
 import { resolveFuelPrice } from "@/lib/metrics";
+import { filterOpt, getSiteScope, composeFilter, siteFilter, type SearchParams, type SiteScope } from "@/lib/site-scope";
 import { formatCurrency, formatNumber } from "@/lib/utils";
 
 export const dynamic = "force-dynamic";
 
-async function loadPlantSummary() {
+async function loadPlantSummary(scope: SiteScope) {
   const pb = await pbAdmin();
+  const siteF = siteFilter(scope);
   const now = new Date();
   const monthStart = new Date(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), 1));
   const monthStartIso = monthStart.toISOString().slice(0, 10);
 
   const [allVehicles, allFuelLogs, fuelPrices] = await Promise.all([
-    pb.collection("vehicles").getFullList({ sort: "description" }),
-    pb.collection("fuel_logs").getFullList({ sort: "-date_logged" }),
+    pb.collection("vehicles").getFullList({
+      sort: "description",
+      filter: composeFilter(siteF, `unit_type="fuel" || unit_type=null || unit_type=""`),
+    }),
+    pb.collection("fuel_logs").getFullList({
+      sort: "-date_logged",
+      ...filterOpt(siteF),
+    }),
     loadFuelPrices(),
   ]);
 
@@ -94,8 +102,13 @@ async function loadPlantSummary() {
   };
 }
 
-export default async function PlantLanding() {
-  const summary = await loadPlantSummary();
+export default async function PlantLanding({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>;
+}) {
+  const scope = await getSiteScope(await searchParams);
+  const summary = await loadPlantSummary(scope);
 
   return (
     <>
diff --git a/src/app/dashboard/plant/vehicles/fuel-view.tsx b/src/app/dashboard/plant/vehicles/fuel-view.tsx
index 528817f..8bac9ae 100644
--- a/src/app/dashboard/plant/vehicles/fuel-view.tsx
+++ b/src/app/dashboard/plant/vehicles/fuel-view.tsx
@@ -195,7 +195,7 @@ const DISMISS_ERROR_COPY: Record<string, string> = {
 export function FuelView({
   rows,
   vehicles,
-  projectCodes,
+  showSiteColumn,
   kpis,
   vehicleBasePath,
   title,
@@ -203,7 +203,7 @@ export function FuelView({
 }: {
   rows: FuelRow[];
   vehicles: VehicleSummary[];
-  projectCodes: string[];
+  showSiteColumn: boolean;
   kpis: FuelKpis;
   vehicleBasePath: string;
   title: string;
@@ -214,7 +214,6 @@ export function FuelView({
     [vehicleBasePath],
   );
   const router = useRouter();
-  const [projectFilter, setProjectFilter] = React.useState<string>("all");
   const [statusFilter, setStatusFilter] = React.useState<string>("all");
   const [search, setSearch] = React.useState("");
   const [page, setPage] = React.useState(1);
@@ -231,7 +230,6 @@ export function FuelView({
   const filtered = React.useMemo(() => {
     const q = search.trim().toLowerCase();
     return rows.filter((r) => {
-      if (projectFilter !== "all" && r.projectCode !== projectFilter) return false;
       if (statusFilter !== "all") {
         if (statusFilter === "flagged" && r.status !== "warn" && r.status !== "alert") return false;
         if (statusFilter !== "flagged" && r.status !== statusFilter) return false;
@@ -239,17 +237,16 @@ export function FuelView({
       if (q && !r.vehicleDescription.toLowerCase().includes(q)) return false;
       return true;
     });
-  }, [rows, projectFilter, statusFilter, search]);
+  }, [rows, statusFilter, search]);
 
   // Vehicles shown in the cards — same filters as the table apply
   const filteredVehicles = React.useMemo(() => {
     const q = search.trim().toLowerCase();
     return vehicles.filter((v) => {
-      if (projectFilter !== "all" && v.projectCode !== projectFilter) return false;
       if (q && !v.description.toLowerCase().includes(q)) return false;
       return true;
     });
-  }, [vehicles, projectFilter, search]);
+  }, [vehicles, search]);
 
   const vehiclesWithOverlay = React.useMemo(
     () =>
@@ -276,7 +273,7 @@ export function FuelView({
   React.useEffect(() => {
     setPage(1);
     setFleetPage(1);
-  }, [projectFilter, statusFilter, search]);
+  }, [statusFilter, search]);
 
   const pageCount = Math.max(1, Math.ceil(filtered.length / PAGE_SIZE));
   const pageRows = React.useMemo(
@@ -297,8 +294,7 @@ export function FuelView({
     [filteredVehicles, fleetPage],
   );
 
-  const filtersActive =
-    projectFilter !== "all" || statusFilter !== "all" || search !== "";
+  const filtersActive = statusFilter !== "all" || search !== "";
 
   // Inline-edit hook for vehicle descriptions. Toggle lives in the
   // Topbar's right slot (next to the Import button); banner shows
@@ -468,24 +464,7 @@ export function FuelView({
             />
           </div>
 
-          <div className="flex flex-col gap-2 sm:flex-row sm:items-center">
-            <span className="flex items-center gap-1.5 text-xs text-muted-foreground">
-              <Filter className="h-3.5 w-3.5" /> Project
-            </span>
-            <Select value={projectFilter} onValueChange={setProjectFilter}>
-              <SelectTrigger className="w-[160px]">
-                <SelectValue />
-              </SelectTrigger>
-              <SelectContent>
-                <SelectItem value="all">All projects</SelectItem>
-                {projectCodes.map((c) => (
-                  <SelectItem key={c} value={c}>
-                    {c}
-                  </SelectItem>
-                ))}
-              </SelectContent>
-            </Select>
-          </div>
+
 
           <div className="flex flex-col gap-2 sm:flex-row sm:items-center">
             <span className="flex items-center gap-1.5 text-xs text-muted-foreground">
@@ -512,7 +491,6 @@ export function FuelView({
               variant="ghost"
               size="sm"
               onClick={() => {
-                setProjectFilter("all");
                 setStatusFilter("all");
                 setSearch("");
               }}
@@ -565,6 +543,7 @@ export function FuelView({
                         onDismiss={handleDismiss}
                         busy={busyId === v.id}
                         disabled={busyId !== null}
+                        showSiteColumn={showSiteColumn}
                       />
                     </li>
                   ))}
@@ -579,6 +558,7 @@ export function FuelView({
                         onDismiss={handleDismiss}
                         busy={busyId === v.id}
                         disabled={busyId !== null}
+                        showSiteColumn={showSiteColumn}
                       />
                     </li>
                   ))}
@@ -622,6 +602,7 @@ export function FuelView({
                           unitType: edit.valueOf(v.id, "unitType", v.unitType),
                           onUnitTypeChange: (next) => edit.setValue(v.id, "unitType", next),
                         }}
+                        showSiteColumn={showSiteColumn}
                       />
                     </li>
                   ))}
@@ -633,7 +614,7 @@ export function FuelView({
                       <TableRow>
                         <TableHead>Description</TableHead>
                         <TableHead>QR code</TableHead>
-                        <TableHead>Project</TableHead>
+                        {showSiteColumn && <TableHead>Project</TableHead>}
                         <TableHead className="text-right">Litres</TableHead>
                         <TableHead className="text-right">Spend</TableHead>
                         <TableHead className="text-right">Txns</TableHead>
@@ -659,6 +640,7 @@ export function FuelView({
                               edit.isDirty(v.id) &&
                               edit.valueOf(v.id, "unitType", v.unitType) !== v.unitType,
                           }}
+                          showSiteColumn={showSiteColumn}
                         />
                       ))}
                     </TableBody>
@@ -702,7 +684,7 @@ export function FuelView({
             ) : (
               pageRows.map((r) => (
                 <li key={r.id}>
-                  <TransactionMobileCard r={r} href={vehicleHref(r.vehicleId)} />
+                  <TransactionMobileCard r={r} href={vehicleHref(r.vehicleId)} showSiteColumn={showSiteColumn} />
                 </li>
               ))
             )}
@@ -713,7 +695,7 @@ export function FuelView({
               <TableHeader>
                 <TableRow>
                   <TableHead>Date</TableHead>
-                  <TableHead>Project</TableHead>
+                  {showSiteColumn && <TableHead>Project</TableHead>}
                   <TableHead>Vehicle</TableHead>
                   <TableHead className="text-right">Odo / meter</TableHead>
                   <TableHead className="text-right">Litres</TableHead>
@@ -743,11 +725,13 @@ export function FuelView({
                       <TableCell className="text-xs tabular-nums">
                         {r.date ? format(parseISO(r.date), "yyyy-MM-dd") : "—"}
                       </TableCell>
-                      <TableCell>
-                        <Badge variant="outline" className="font-mono text-xs">
-                          {r.projectCode || "—"}
-                        </Badge>
-                      </TableCell>
+                      {showSiteColumn && (
+                        <TableCell>
+                          <Badge variant="outline" className="font-mono text-xs">
+                            {r.projectCode || "—"}
+                          </Badge>
+                        </TableCell>
+                      )}
                       <TableCell>
                         <Link
                           href={vehicleHref(r.vehicleId)}
@@ -823,12 +807,14 @@ function AlertCard({
   onDismiss,
   busy,
   disabled,
+  showSiteColumn,
 }: {
   v: VehicleSummary;
   href: string;
   onDismiss: (id: string) => void;
   busy: boolean;
   disabled: boolean;
+  showSiteColumn: boolean;
 }) {
   const dominant = v.alert > 0 ? "alert" : "warn";
   const toneClasses =
@@ -860,9 +846,11 @@ function AlertCard({
               QR {v.qrCodeId}
             </p>
           )}
-          <Badge variant="outline" className="mt-2 font-mono text-xs">
-            {v.projectCode || "—"}
-          </Badge>
+          {showSiteColumn && (
+            <Badge variant="outline" className="mt-2 font-mono text-xs">
+              {v.projectCode || "—"}
+            </Badge>
+          )}
         </div>
         <ArrowRight
           className="mt-1 h-4 w-4 shrink-0 text-muted-foreground"
@@ -924,12 +912,14 @@ function AlertListRow({
   onDismiss,
   busy,
   disabled,
+  showSiteColumn,
 }: {
   v: VehicleSummary;
   href: string;
   onDismiss: (id: string) => void;
   busy: boolean;
   disabled: boolean;
+  showSiteColumn: boolean;
 }) {
   const dominant = v.alert > 0 ? "alert" : "warn";
   const stripeColor =
@@ -951,9 +941,11 @@ function AlertListRow({
             QR {v.qrCodeId}
           </span>
         )}
-        <Badge variant="outline" className="shrink-0 font-mono text-[10px]">
-          {v.projectCode || "—"}
-        </Badge>
+        {showSiteColumn && (
+          <Badge variant="outline" className="shrink-0 font-mono text-[10px]">
+            {v.projectCode || "—"}
+          </Badge>
+        )}
       </div>
       <div className="flex shrink-0 items-center gap-1.5">
         {v.alert > 0 && (
@@ -1010,6 +1002,7 @@ function FleetMobileCard({
   v,
   href,
   edit,
+  showSiteColumn,
 }: {
   v: VehicleSummary;
   href: string;
@@ -1021,6 +1014,7 @@ function FleetMobileCard({
     unitType: "fuel" | "plant";
     onUnitTypeChange: (next: "fuel" | "plant") => void;
   };
+  showSiteColumn: boolean;
 }) {
   return (
     edit.editing ? (
@@ -1049,9 +1043,11 @@ function FleetMobileCard({
         </div>
         <div className="flex items-center justify-between text-xs text-muted-foreground">
           <div className="flex min-w-0 items-center gap-2">
-            <Badge variant="outline" className="font-mono text-[10px]">
-              {v.projectCode || "—"}
-            </Badge>
+            {showSiteColumn && (
+              <Badge variant="outline" className="font-mono text-[10px]">
+                {v.projectCode || "—"}
+              </Badge>
+            )}
             {v.fuelLimits && (
               <span className="whitespace-nowrap font-medium tabular-nums" title={v.fuelLimits}>{v.fuelLimits}</span>
             )}
@@ -1098,9 +1094,11 @@ function FleetMobileCard({
       </div>
       <div className="flex items-center justify-between text-xs text-muted-foreground">
         <div className="flex min-w-0 items-center gap-2">
-          <Badge variant="outline" className="font-mono text-[10px]">
-            {v.projectCode || "—"}
-          </Badge>
+          {showSiteColumn && (
+            <Badge variant="outline" className="font-mono text-[10px]">
+              {v.projectCode || "—"}
+            </Badge>
+          )}
           <UnitTypePill value={v.unitType} />
           {v.fuelLimits && (
             <span className="whitespace-nowrap font-medium tabular-nums" title={v.fuelLimits}>{v.fuelLimits}</span>
@@ -1164,7 +1162,7 @@ function DescriptionInput({
   );
 }
 
-function TransactionMobileCard({ r, href }: { r: FuelRow; href: string }) {
+function TransactionMobileCard({ r, href, showSiteColumn }: { r: FuelRow; href: string; showSiteColumn: boolean }) {
   return (
     <Link
       href={href}
@@ -1186,7 +1184,7 @@ function TransactionMobileCard({ r, href }: { r: FuelRow; href: string }) {
             <span className="tabular-nums">
               {r.date ? format(parseISO(r.date), "yyyy-MM-dd") : "—"}
             </span>
-            {r.projectCode && (
+            {showSiteColumn && r.projectCode && (
               <>
                 <span aria-hidden>·</span>
                 <Badge variant="outline" className="font-mono text-[10px]">
@@ -1224,6 +1222,7 @@ function FleetRow({
   v,
   href,
   edit,
+  showSiteColumn,
 }: {
   v: VehicleSummary;
   href: string;
@@ -1236,6 +1235,7 @@ function FleetRow({
     onUnitTypeChange: (next: "fuel" | "plant") => void;
     dirtyUnitType: boolean;
   };
+  showSiteColumn: boolean;
 }) {
   const router = useRouter();
   const handleNav = React.useCallback(() => router.push(href), [router, href]);
@@ -1286,11 +1286,13 @@ function FleetRow({
           <span className="text-xs text-muted-foreground">—</span>
         )}
       </TableCell>
-      <TableCell>
-        <Badge variant="outline" className="font-mono text-xs">
-          {v.projectCode || "—"}
-        </Badge>
-      </TableCell>
+      {showSiteColumn && (
+        <TableCell>
+          <Badge variant="outline" className="font-mono text-xs">
+            {v.projectCode || "—"}
+          </Badge>
+        </TableCell>
+      )}
       <TableCell className="text-right tabular-nums">
         {v.totalLitres > 0
           ? `${formatNumber(v.totalLitres, { maximumFractionDigits: 1 })} L`
diff --git a/src/app/dashboard/plant/vehicles/page.tsx b/src/app/dashboard/plant/vehicles/page.tsx
index 2c926e9..2f91aef 100644
--- a/src/app/dashboard/plant/vehicles/page.tsx
+++ b/src/app/dashboard/plant/vehicles/page.tsx
@@ -1,6 +1,13 @@
 import { pbAdmin } from "@/lib/pb";
 import { loadFuelPrices } from "@/lib/fuel-prices";
 import { parseFuelLimit } from "@/lib/fuel-variance";
+import {
+  composeFilter,
+  filterOpt,
+  getSiteScope,
+  siteFilter,
+  type SearchParams,
+} from "@/lib/site-scope";
 import {
   computeFuelLogStatuses,
   resolveFuelPrice,
@@ -11,7 +18,13 @@ import { FuelView, type FuelRow, type VehicleSummary } from "./fuel-view";
 
 export const dynamic = "force-dynamic";
 
-export default async function FuelPage() {
+export default async function FuelPage({
+  searchParams,
+}: {
+  searchParams: Promise<SearchParams>;
+}) {
+  const scope = await getSiteScope(await searchParams);
+  const siteF = siteFilter(scope);
   const pb = await pbAdmin();
 
   const [vehicles, fuelLogs, fuelPrices, sites] = await Promise.all([
@@ -20,10 +33,13 @@ export default async function FuelPage() {
     // appear on the Fleet page where the user expects them)
     pb.collection("vehicles").getFullList({
       sort: "description",
-      filter: `unit_type="fuel" || unit_type=null || unit_type=""`,
+      filter: composeFilter(siteF, `unit_type="fuel" || unit_type=null || unit_type=""`),
     }),
-    pb.collection("fuel_logs").getFullList({ expand: "vehicle" }),
+    pb.collection("fuel_logs").getFullList({ expand: "vehicle", ...filterOpt(siteF) }),
     loadFuelPrices(),
+    // Sites is a lookup table for project_code display, not a data
+    // read — left unfiltered so project_code resolution still works
+    // when this page is scoped to a single site.
     pb.collection("sites").getFullList({ fields: "id,project_code" }),
   ]);
 
@@ -164,13 +180,11 @@ export default async function FuelPage() {
     };
   });
 
-  const projectCodes = Array.from(new Set(rows.map((r) => r.projectCode))).sort();
-
   return (
     <FuelView
       rows={rows}
       vehicles={vehicleSummaries}
-      projectCodes={projectCodes}
+      showSiteColumn={scope.mode === "all"}
       kpis={{
         vehicles: vehicles.length,
         totalLitres,