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The 2008 Jeep Grand Cherokee comes with different engine options. The 3.7 liter V6 engine requires 5 US quarts of either 5W-30 or 5W-20 oil. For the 4.7 liter V8 engine, you'll need 6 US quarts of the same oils. The two larger engines, the 5.7 liter V8 and the 6.1 liter V8, both need 7 quarts of oil each. Jeep suggests using 5W-20 for the 5.7 liter HEMi and either 0W-40 or 5W-40 for the 6.1 liter engine. When it comes to oil changes, if you are using fully synthetic lubricants, it's recommended to do so every 7,500-10,000 miles or yearly. However, if you are utilizing conventional oil, it's best to change it every 3,000-5,000 miles or every 6 months. The benefits of synthetic oils over conventional ones include improved lubrication between engine components, longer durations between maintenance checks, and better performance in extreme weather conditions. Opting for oil with a lower viscosity helps it move more efficiently in colder climates, effectively covering various engine parts and offering enhanced protection against friction and corrosion.
In 2008, the Jeep Grand Cherokee has different oil capacities for its engine options: The 3.7-liter engine takes 4.7 liters (5 quarts), the 4.7-liter engine needs 5.7 liters (6 quarts), the 5.7-liter engine requires 6.6 liters (7 quarts), and the 3.0-liter diesel engine has a capacity of 9.5 liters (10 quarts), using SAE 5W-20 or 5W-30 oil that is API certified for gasoline engines and low ash for the diesel engine.
Five quarts