• 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
H1 6.5D (1994 – 2004)	Detroit Diesel V8	7.6 / 1	3000 miles
H1 6.5TD (1996 – 2004)		7.6 / 1	3000 miles
H1 6.6TD (2005 – 2006)	Duramax 6600 LLY	n/a	n/a