Shop By Motor Oil Type

Full Synthetic Oil Type Full Synthetic - All Brands
Full Synthetic High Mileage Motor Oil Full Synthetic High Mileage - All Brands
Heavy-Duty & Diesel Motor Oil Heavy-Duty & Diesel - All Brands
Conventional Motor Oil Conventional - All Brands
Conventional High Mileage Motor Oil Conventional High Mileage - All Brands

Shop the Best Motor Oil Brands

O’Reilly Auto Parts stocks name-brand oils that you can trust to keep your vehicle running at peak performance. We carry top synthetic oil brands, such as SYNTEC, Mobil 1, Castrol, Valvoline, Pennzoil, Royal Purple, as well as our own O’Reilly full synthetic, conventional, and high-mileage oil. Check out our extensive selection and find your preferred conventional, synthetic, high-mileage, diesel, or heavy-duty engine oil, including SYNTEC Powered by O'Reilly.
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SYNTEC Motor Oil SYNTEC
Royal Purple Motor Oil Royal Purple
Castrol Motor Oil Castrol
Pennzoil Motor Oil Pennzoil
Valvoline Motor Oil Valvoline
Mobil 1 Motor Oil Mobil 1

How To: Choose the Best Synthetic Oil or Conventional Oil For Your Vehicle

When choosing the type of oil that's best for your vehicle, consider the type of engine, age, mileage, and your specific needs or driving style. Most modern vehicles are equipped to use only synthetic oil as recommended by the manufacturer, but older vehicles may still be able to use conventional oil. Even older vehicles can benefit from a synthetic oil upgrade, and you can find the best synthetic oil for your late-model or classic car at O’Reilly Auto Parts. High-mileage oil is recommended for engines with over 75,000 miles, and is available in both conventional high-mileage and full synthetic high-mileage oil varieties. Heavy-duty vehicles with diesel engines also use a specially-formulated oil made for complete diesel engine protection. You can use our vehicle selector to find the best oil for your vehicle, or check your owner’s manual to find the manufacturer’s recommended type and weight of oil for your application.

Oil Change Tools and Equipment

The best way to change engine oil is to make sure you have all the necessary oil, tools, and supplies before cracking open your vehicle's oil drain plug. When performing a complete oil change, you should also always replace the oil filter. O'Reilly Auto Parts carries oil filter wrenches to help remove old or stuck-on oil filters and install new ones quickly. We also stock a wide selection of jacks and jack stands for light- and heavy-duty vehicles, as well as oil drain plugs and gaskets, shop towels, funnels, drain pans, and tool sets to help ensure the easiest and most efficient oil change.

We also offer Free Motor Oil Recycling for hassle-free oil disposal at your closest O'Reilly Auto Parts store.
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Additional How-To Hub Motor Oil Resources

How to Change Oil and Oil Filter

How to Change Oil and Oil Filter
Synthetic Oil vs Conventional Oil

Synthetic Oil vs Conventional Oil
Motor Oil Weights Explained

Motor Oil Weights Explained