The recommended oil type for the 2008 Jeep Grand Cherokee is SAE 5W-30 Synthetic Diesel for the 3.0 L V6 diesel, 5W-20 Synthetic for the 3.7 L V6, 4.7 L V8 and 5.7 L V8 and 0W-40 Synthetic for the 6.1 L V8 engine. The capacity for the vehicle iS-10 quarts with a filter for the 3.0 L V6 diesel, 5 quarts with a filter for the 3.7 L V6, 6 quarts with a filter for the 4.7 L V8 and 7 quarts with a filter for the 5.7 L V8 and 6.1 L V8. You should change the oil and the filter every 7,500 to 10,000 miles or so. The cost of a change if taken to a mechanic is anywhere from $30 to $40 in labor costs.
John A.
January 2, 2020
The following gasoline engines for the 2008 Jeep Grand Cherokee all use 5W20 weighted synthetic oil: the 3.7L V6 (5 quarts), the 4.7L V8 (6 quarts), the 4.7L V8 Flex (6 quarts), and the 5.7L V8 (7 quarts). The 3.0L V6 Turbo Diesel needs 10 quarts of 5W30 synthetic formulated oil. The 6.1L V8 engine option for the 2008 Grand Cherokee takes 7 quarts of 0W40 synthetic oil.
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