Engine Oil

Few chemicals are more crucial to your car’s performance than oil. Your engine’s lubrication system reduces friction and protects your vehicle. Over time, exposure to engine heat and exhaust gases wears out the oil. Protect your engine when you start your next oil change at AutoZone. We carry all major weights and compositions from all the best motor oil brands, so no matter what you drive, we have what it takes to do the job right.

Changing your oil regularly is the best way to keep a vehicle's engine running smoothly and for a long time. Browse our selection of conventional and synthetic motor oil to find great deals. You can filter by brand, container, or SAE oil weight by using Narrow Your Results.

What Kind of Oil Does My Car Need?

We have the right price on motor oil for your vehicle. Consult your owner's manual or simply enter your vehicle's information at the top of this page. Whatever you drive, we have conventional motor oils, high mileage oils, and blend or full synthetic motor oils to cover every major make and model's needs.

What Does Oil Weight Mean?

Oil weight is a measurement viscosity. It is a term assigned by the Society of Automotive Engineers (SAE) to specify how well a given oil flows at an engine's operating temperature. Higher weighted oils are thicker and flow more slowly than lower weights.

Most oils have two weights that are separated by a "w," like 5w30. That's because cold weather changes how oil flows. In this case it would flow like a 5 weight at the time of a cold startup, and then flow like a 30 weight once the engine finished warming up to 210 degrees Fahrenheit.

What Types of Motor Oil Does AutoZone Carry?

Conventional motor oil is a mixture of base oil and additives that lubricates, cleans, and protects the engine. This was long the standard kind of oil in most vehicles, but has become less common as synthetic oils have gotten better
- Synthetic motor oils are either full synthetic oils or synthetic blends. Both come from a more complex refinement process than conventional options, which have more impurities due to their crude oil content. Full synthetics and synthetic blends better protect your engine and help improve performance
- High mileage motor oils are made to provide extra protection as the engine ages and more wear accumulates. They should generally be used with vehicles that have more than 75,000 miles on the odometer

You can learn more about the difference between conventional and synthetic oil here.

We carry different categories of each type of oil for gas engines, diesel motors, racing, motorcycles, marine applications, and more.

How Often to Change Oil?

Generally, you should change conventional oil every 3,000 miles or every 3 months. Synthetic oils have increased this the oil change interval for most vehicles to anywhere between 5,000 and 15,000 miles. Some only need to be changed once a year.

Signs it may be time to change your oil include smoky exhaust, low oil levels, and more engine noise, particularly when idling. If it's time, check out our oil change guide.

What is Motor Oil?

Motor oil consists of a base oil that is mixed with additives and detergents that lubricate and clean your engine.

Engine oil creates a separating film that lubricates moving parts to reduce friction, helping your car run more efficiently. Friction turns useful energy into heat, wearing your engine and making it work harder.

Car or truck, diesel or gasoline, we have the best brands and products for gas engines or diesel trucks. Buy online for Free Next Day Delivery or pick up your oil at an AutoZone near you today.