What type of oil do you use in a 1991 Lincoln Town Car?

The recommended oil type for a 1991 Lincoln Town Car depends on the engine it has. Most likely it's either a 4.6L V8 or a 5.0L V8. However, checking your owner's manual is crucial for the definitive answer.

That said, generally speaking, for those engines in a 1991 Town Car, a conventional 10W-30 motor oil meeting the specifications SF, SG, or SH (older standards) would be appropriate. You might also find newer oils like SL or SM acceptable depending on availability, but it's always best to stick with the original specifications if possible.

Crucially: Always check your owner's manual for the *exact* recommendation from Lincoln. The manual will specify the correct viscosity (like 10W-30) and the API service classification (like SF, SG, SH). Using the wrong oil can damage your engine.