Best type of oil to use in 2000 buick lesabre?

The best type of oil for a 2000 Buick LeSabre depends on the engine it has (3.1L V6, 3.8L V6, or possibly a 4.6L V8) and the climate where you live. However, generally speaking, a conventional 5W-30 oil is a good starting point and often recommended for that generation of vehicle.

To be absolutely certain, check your owner's manual. It will specify the recommended oil viscosity (like 5W-30 or 10W-30) and type (conventional, synthetic blend, or full synthetic). The manual is the definitive source for this information.

If you don't have the manual, you can usually find a digital copy online by searching for "[Your Engine Size] Buick LeSabre Owner's Manual".

While full synthetic oil offers some performance advantages, it's not strictly *necessary* for a 2000 LeSabre unless you're frequently driving in extreme temperatures or conditions. A good quality conventional 5W-30 will often suffice and is more budget-friendly. A synthetic blend could be a good compromise. Always use the recommended weight and type of oil as specified by Buick.