Old-school motor oil is made from crude oil. This kind of oil has been used for more than 100 years to lubricate engines. It does the job well. It breaks down over time, but not too quickly.
Synthetic oil starts out as old-school oil. Then it's modified. It lubricates even better and stands up to high heat better without turning into gel or getting watery. Some blends of synthetic oil are designed to keep high-mileage vehicles rolling longer. Others are meant for high-performance engines. Still others can help to improve your car's fuel mileage.
Even if you use synthetic oil, it's important to have oil changed often to get rid of the dirt and grit that can scratch your engine's tight-fitting parts.
Pick the right oil for your car or truck, and make an appointment for an oil change now.