Can a 1997 Lincoln town car take 5w20 motor oil?

The 1997 Lincoln Town Car's recommended oil viscosity depends on the engine it has. Most likely, it has either a 4.6L V8 or a smaller V8. The owner's manual is the definitive source.

While 5W-20 is a common modern oil weight, it's not guaranteed to be suitable for a 1997 Town Car. Older engines often perform better with a slightly higher viscosity, like 5W-30 or even 10W-30, especially in hotter climates. Using too thin an oil can lead to increased engine wear.

Check your owner's manual. It will specify the recommended oil viscosity and weight for your specific engine and operating conditions. This is crucial to avoid potential engine damage.