• Engine: Engine Code. A sequence of letters and numbers. This includes the engine block type and engine family, but may also include other information.
• Capacity: Capacity/Filter capacity in litres(liters). Engine oil fill quantity (Service fill).
• Intervals: Oil Change Intervals (use: normal). Engine oil should be changed at the latest after this time or after miles/km, whichever comes first.

The oil filter must be replaced every time the oil is changed, unless the car's owner's manual recommends otherwise.

	Engine	Capacity	Intervals
Wrangler 2.5 (1987 – 1993)	(150 ci)	3.8 / 0.5	8 000 km/ 12 months
Wrangler 2.5 (1994 – 1997)	(150 ci)	3.8 / 0.5	12 000 km/ 6 months
Wrangler 4.0 (1994 – 1997)		5.7 / 0.5	12 000 km/ 6 months
Wrangler 4.2 (1987 – 1993)	(258 ci)	5.7 / 0.5	8 000 km/ 6 months
CJ-7 / CJ-8 (1985 – 1987)	J8S	6 / 0.5	7 500 km