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What is the oil capacity for a 6 cylinder 4.2l 1987 Jeep Wrangler?

The oil capacity for a 1987 Jeep Wrangler with the 4.2L 6-cylinder engine is typically 5 quarts. However, it's always best to check your owner's manual for the exact specification as there might be slight variations. Adding a little extra (up to 5.5 quarts) won't hurt, but overfilling can cause problems.