1990 Ford F-150 Custom SuperCab 4x2 8-foot Styleside box — 4.9-liter EFI inline-six

Service topics

4

Factory intervals

4

Fitment-scoped

4

Exact references

1

Before orderingIdentify 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.

• 01

  Engine oil and filter

  Sourced interval available

  Applies to: 1990 · 4.9L EFI inline-six · United States · Ford prints these examples specifically for a 1990 F-150 4x2 with the 4.9-liter six; other engines, 4x4 use, and severe duty are not claimed.

  Published interval: 7,500 mi / 6 months · Normal maintenance example.

  Source: Ford Division — 1990 F-Series brochure, F-150 trim, chassis, powertrain, and maintenance matrices (preserved PDF) · Scheduled Maintenance, brochure page 23 — each 7,500 miles or 6 months · checked 2026-08-09

• 02

  Spark plugs

  Sourced interval available

  Applies to: 1990 · 4.9L EFI inline-six · United States · Ford prints these examples specifically for a 1990 F-150 4x2 with the 4.9-liter six; other engines, 4x4 use, and severe duty are not claimed.

  Published interval: 30,000 mi · Normal maintenance example.

  Source: Ford Division — 1990 F-Series brochure, F-150 trim, chassis, powertrain, and maintenance matrices (preserved PDF) · Scheduled Maintenance, brochure page 23 — each 30,000 miles · checked 2026-08-09

• 03

  Air filter

  Exact reference available

  Applies to: 1990 · 4.9-liter EFI inline-six, 5.0-liter EFI V8, 5.8-liter EFI V8 · United States

  Source: Walmart Business catalog — FA-1046 interchange and engine-specific F-150 fitment · Vehicle fitment — F-150 4.9L and 5.0L 1987–1996; 5.8L 1988–1996; OE interchange FA-1046 · checked 2026-08-27

  4.9L factory maintenance example

  Applies to: 1990 · 4.9L EFI inline-six · United States · Ford prints these examples specifically for a 1990 F-150 4x2 with the 4.9-liter six; other engines, 4x4 use, and severe duty are not claimed.

  Published interval: 30,000 mi · Normal maintenance example.

  Source: Ford Division — 1990 F-Series brochure, F-150 trim, chassis, powertrain, and maintenance matrices (preserved PDF) · Scheduled Maintenance, brochure page 23 — each 30,000 miles · checked 2026-08-09

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

  Motorcraft FA-1046

  Applies to: 1990 · 4.9-liter EFI inline-six, 5.0-liter EFI V8, 5.8-liter EFI V8 · United States

  Source: Walmart Business catalog — FA-1046 interchange and engine-specific F-150 fitment · Vehicle fitment — F-150 4.9L and 5.0L 1987–1996; 5.8L 1988–1996; OE interchange FA-1046 · checked 2026-08-27

  Verified ordering references

  • Service replacementMotorcraft FA-1046

    Qty. 1 · Engine air-filter element · catalog-listed

    The catalog cross-references FA-1046 for these 1990 F-150 gasoline-engine applications; confirm the VIN and installed air-cleaner housing before ordering.

    Catalog: Walmart Business catalog — FA-1046 interchange and engine-specific F-150 fitment · Vehicle fitment — F-150 4.9L and 5.0L 1987–1996; 5.8L 1988–1996; OE interchange FA-1046 · checked 2026-08-27

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• 04

  Engine coolant

  Sourced interval available

  Applies to: 1990 · 4.9L EFI inline-six · United States · Ford prints these examples specifically for a 1990 F-150 4x2 with the 4.9-liter six; other engines, 4x4 use, and severe duty are not claimed.

  Published interval: 30,000 mi / 36 months · Normal maintenance example.

  Source: Ford Division — 1990 F-Series brochure, F-150 trim, chassis, powertrain, and maintenance matrices (preserved PDF) · Scheduled Maintenance, brochure page 23 — each 30,000 miles or 3 years · checked 2026-08-09