What kind of oil does a 1990 Buick lesabre take?

A 1990 Buick LeSabre's oil type depends on the engine it has. At that time, Buick LeSabres were available with several different engines. To know for sure what oil to use, you need to check your owner's manual. This is the best source of information.

However, generally speaking, cars from that era often used SAE 10W-30 or SAE 20W-40 conventional motor oil. Always check the owner's manual for the specific viscosity recommendation based on your climate and engine type. The manual will also specify the amount of oil your engine requires.

It's crucial to use the correct oil type and weight to ensure proper lubrication and engine performance. Using the wrong oil can cause serious engine damage.