1981 Ford F-150 Ranger Lariat Regular Cab 4x2 8-foot Styleside box — 5.0-liter V8

Service topics

6

Scheduled topics

6

Applicability stated

6

Exact references

1

Before ordering Identify your engine, options and build date. Part numbers and sizes can change within one model year. Shopping links appear only for catalog-backed references; still verify the listing against your vehicle before ordering.

• Engine oil and filterView intervals, applicability and sources

  01

  Engine oil and filter

  Exact reference available

  Applies to: 1981 · United States · All US gasoline F-100 through F-350 vehicles in the source's 1980–1981 band, including F-150; this is a period secondary compilation rather than the original owner guide.

  Published interval: 7,500 mi / 12,000 km / 7 months · Whichever comes first; all US vehicles.

  Source: Chilton — Ford Pick-Ups and Bronco 1976–86 preventive-maintenance tables · General Information and Maintenance, printed page 40 — 1980–81 all-US-vehicles oil/filter row · checked 2026-08-24

  4.9L inline-six, 5.0L V8, 5.8L V8

  Baldwin B2

  Applies to: 1981 · 4.9-liter inline-six, 5.0-liter V8, 5.8-liter V8 · United States

  Source: Parker/Baldwin Automotive Applications — 1981 Ford F-Series engine-filter table · Ford 1981, Pickups/F-Series engine rows, PDF page 826 — gasoline engines used by the F-150 list Baldwin lube filter B2 · checked 2026-09-01

  Verified ordering references

  • Service replacementBaldwin B2

    Qty. 1 · Full-flow spin-on engine-oil filter · catalog-listed

    Baldwin's manufacturer application catalog lists B2 for the 1981 F-Series gasoline-engine rows represented here. Confirm the installed engine and filter mounting before ordering.

    Catalog: Parker/Baldwin Automotive Applications — 1981 Ford F-Series engine-filter table · Ford 1981, Pickups/F-Series engine rows, PDF page 826 — gasoline engines used by the F-150 list Baldwin lube filter B2 · checked 2026-09-01

    Search this part on Amazon
• Automatic transmission fluidView intervals, applicability and sources

  02

  Automatic transmission fluid

  Sourced interval available

  Applies to: 1981 · Automatic · United States · All US gasoline F-100 through F-350 vehicles in the source's 1980–1981 band, including F-150; this is a period secondary compilation rather than the original owner guide.

  Published interval: 22,000 mi / 35,200 km / 22 months · Change; whichever comes first.

  Source: Chilton — Ford Pick-Ups and Bronco 1976–86 preventive-maintenance tables · General Information and Maintenance, printed page 40 — 1980–81 all-US-vehicles automatic-transmission row · checked 2026-08-24

• Spark plugsView intervals, applicability and sources

  03

  Spark plugs

  Sourced interval available

  Applies to: 1981 · United States · All US gasoline F-100 through F-350 vehicles in the source's 1980–1981 band, including F-150; this is a period secondary compilation rather than the original owner guide.

  Published interval: 30,000 mi / 48,000 km / 30 months · Replace; whichever comes first.

  Source: Chilton — Ford Pick-Ups and Bronco 1976–86 preventive-maintenance tables · General Information and Maintenance, printed page 40 — 1980–81 all-US-vehicles spark-plug row · checked 2026-08-24

• Engine air-cleaner elementView intervals, applicability and sources

  04

  Engine air-cleaner element

  Sourced interval available

  Applies to: 1981 · United States · All US gasoline F-100 through F-350 vehicles in the source's 1980–1981 band, including F-150; this is a period secondary compilation rather than the original owner guide.

  Published interval: 30,000 mi / 48,000 km / 30 months · Replace; whichever comes first.

  Source: Chilton — Ford Pick-Ups and Bronco 1976–86 preventive-maintenance tables · General Information and Maintenance, printed page 40 — 1980–81 all-US-vehicles air-cleaner row · checked 2026-08-24

• Front wheel bearings and spindleView intervals, applicability and sources

  05

  Front wheel bearings and spindle

  Sourced interval available

  Applies to: 1981 · United States · All US gasoline F-100 through F-350 vehicles in the source's 1980–1981 band, including F-150; this is a period secondary compilation rather than the original owner guide.

  Published interval: 30,000 mi / 48,000 km / 30 months · Inspect, clean, and repack; whichever comes first.

  Source: Chilton — Ford Pick-Ups and Bronco 1976–86 preventive-maintenance tables · General Information and Maintenance, printed page 40 — 1980–81 all-US-vehicles wheel-bearing row · checked 2026-08-24

• Brake and exhaust system inspectionView intervals, applicability and sources

  06

  Brake and exhaust system inspection

  Sourced interval available

  Applies to: 1981 · United States · All US gasoline F-100 through F-350 vehicles in the source's 1980–1981 band, including F-150; this is a period secondary compilation rather than the original owner guide.

  Published interval: 30,000 mi / 48,000 km / 30 months · Inspect; whichever comes first.

  Source: Chilton — Ford Pick-Ups and Bronco 1976–86 preventive-maintenance tables · General Information and Maintenance, printed page 40 — 1980–81 all-US-vehicles brake/exhaust rows · checked 2026-08-24