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1986 Jeep Cj7Oil Type & Capacity
OEM spec from the factory service manual for the 2.5 U, T4 variant.
Quick Answer
Oil Type
$API - SF, SAE 5W-30 (Below 60Deg.F), 10W-30 or 10W-40 (Above 0Deg.F), 20W-40 or 20W-50 (Above 30Deg.F)
Capacity (w/ Filter)
4.00 QTS.
3.78 L
Variant
2.5 U, T4
This vehicle's factory manual
1986 Jeep Cj7: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Sister site: See this spec on WhatTypeOfOil.com — our quick oil type & capacity lookup for every vehicle.
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Frequently Asked Questions
- What type of oil does a 1986 Jeep Cj7 take?
- The 1986 Jeep Cj7 requires API - SF, SAE 5W-30 (Below 60Deg.F), 10W-30 or 10W-40 (Above 0Deg.F), 20W-40 or 20W-50 (Above 30Deg.F). The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the 2.5 U, T4 configuration.
- How much oil does a 1986 Jeep Cj7 need?
- The 1986 Jeep Cj7 takes 4.00 QTS. (3.78 L) of engine oil with the filter replaced.
- Can I use synthetic oil in my 1986 Jeep Cj7?
- Yes — synthetic oil that meets the API - SF, SAE 5W-30 (Below 60Deg.F), 10W-30 or 10W-40 (Above 0Deg.F), 20W-40 or 20W-50 (Above 30Deg.F) specification is acceptable and often preferred for better protection and longer change intervals.
- What happens if I use the wrong oil in my 1986 Jeep Cj7?
- Using oil that does not meet the API - SF, SAE 5W-30 (Below 60Deg.F), 10W-30 or 10W-40 (Above 0Deg.F), 20W-40 or 20W-50 (Above 30Deg.F) specification can reduce engine protection, increase wear, and potentially void warranty coverage. Always use oil that meets the OEM spec.