Come on DimDummy, what's so hard with answering a few simple yes or no
questions?



Yes or no:

In a normal engine the oil ring on a piston is not 100% effective in
removing all of the oil from the cylinder wall.

In a normal engine a thin film of oil is left on the cylinder walls on the
downward stroke.

In a normal engine some oil is burned in the combustion chamber.

In a normal engine some oil is consumed in the combustion chamber.