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The quantity of oil needed for a 2018 Jeep Grand Cherokee would vary based on the engine type, with different trim levels offering various engine options. The engine sizes include an 8-quart capacity for the 3.0L V6 and a 6-quart capacity for the 3.6L V6, both requiring 5W40 synthetic oil as per the factory specifications. When it comes to the SUV's 5.7L V8 on both trim levels, it requires 7 quarts of the recommended 5W20 synthetic oil. While the Jeep can technically use cheaper conventional oil, it is not as efficient for lubrication and would necessitate more frequent changes. The full-synthetic oil change interval is between 5500 to 7500 miles, while traditional oil changes are recommended at 3500 miles. At an auto repair shop, the cost of an oil change can range from $30 to $50 for conventional oil and $50 to $80 for synthetic oil.
The Jeep Grand Cherokee's equipped with a 3.6-liter Flex Fuel engine require 5.9 quarts of oil. For the larger, fully gasoline powered Grand Cherokee with a 5.7-liter engine, you'll need to use 7 quarts of oil. Surprisingly, the 3.0-liter diesel engine holds the most oil at 8.1 quarts among all engine choices in the Grand Cherokee lineup.
In 2018, the Jeep Grand Cherokee with a 3.6-liter flex fuel engine requires 5.9 quarts of oil, while the 5.7-liter Grand Cherokee needs 7 quarts of oil.