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What type of oil does a 1999 jeep wrangler use?

The type of oil a 1999 Jeep Wrangler uses depends on the engine it has. There were several engine options for that year. You must check your owner's manual to be certain.

However, generally speaking, 1999 Jeep Wranglers used either:

* SAE 10W-30: This was a common recommendation, especially for the 4.0L inline-6 engine, which was very popular in that year.

* SAE 5W-30: This is a slightly thinner oil, and might be recommended depending on climate and the specific engine.

Crucially: The owner's manual will specify the *correct* oil weight and whether it should be conventional, synthetic blend, or full synthetic. Ignoring this information could damage your engine. Find your manual, or check the Jeep's website for a digital copy.

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