TIP
When you buy oil (or have it changed), make sure you pick the right API
rating for your engine. Also ask for the SAE viscosity recommended in your
owner’s manual. Car manufacturers recommend multi-viscosity grades,
which are suitable for use over a wide temperature range. Automobile
manufacturers specify the proper SAE viscosity rating in your owner’s
manual. Multi-viscosity oils provide excellent protection in virtually all parts
of the United States. SAE viscosity rating becomes especially important
when you take into consideration the vehicle’s warranty. You don’t want to
use the wrong oil and void the warranty.