If you check your oil and find it smells like gas, then it's something that shouldn't be ignored. Here are the most likely ...

The stroke is considerably shorter, and uses energy of the engine's exhaust vacuum to assist in the combustion cycle ... gas just like everything else, and oil is running out.

Because modern internal combustion engines have tighter spaces between fast-moving metal parts to help make them more efficient. That means these engines usually need lower-viscosity oil—oil ...