Choosing the right oil can make or break your engine. ... What’s Inside That Bottle of Oil Really Does Make a Difference. Black Gold. HOT ROD Staff Writer Jun 24, 2019. See All 14 Photos.

But since oil changes happen so infrequently — changing it out every 5,000 to 10,000 miles is recommended – you could find yourself with a bottle or two of unused engine oil for an extended ...

Best diesel engine oil: Shell Rotella T6 Full Synthetic Diesel: Synthetic: 1 gallon/5 gallon: $32-$274: Enlarge Image Pennzoil. ... It's usually on the label on the back of the bottle.

The best synthetic oil products last longer, keep engines cleaner, perform well in all temperatures, ... The big numbers on a motor oil bottle such as 10w40 or 5W30 indicate its viscosity, ...

Independent oil tests by Blackstone Labs keep finding normal wear levels, whether the sample comes from Quaker State, Mobil 1, or Royal Purple — showing that the name on the bottle matters far ...

While many engines are capable of running a couple of different oil viscosities — for example, some Toyota RAV4s accept both 0W-20 and 5W-20 oil — straying too far from the accepted range can ...

Q: I have a 2016 Toyota Camry that takes 0W-20 engine oil. I need to add about half a quart, and I have some unused leftover 0W–20 oil in the garage. However, it is about 2½ years old.

3. Can I Use GF-7 Engine Oil In My Older Car? Yes, GF-7A engine oils are designed to be backward-compatible with previous ILSAC specifications in popular viscosity grades like 0W-20, 5W-20, 0W-30 ...