Engine oil is essential for cars with internal combustion engines. It lubricates the engine's internal parts, like the camshaft(s), crankshaft, and pistons, as well as helps with heat dissipation. But ...

While there are other nuances to motor oil classifications that need to be understood before changing or topping off the oil ...

W-20 engine oil is a lightweight oil that should not be used to replace 5W-30 if the engine does not support it.