Could be ring blow-by.....
[Conceptually a leak but doesn’t leave spots on the floor.]
If the rings are bad it would be time to get the engine rebuilt if I the money, but I would probably trade it in instead.
“Could be ring blow-by.....
[Conceptually a leak but doesn’t leave spots on the floor.]”
Look and smell for oily exhaust at the tailpipe. Over time the cylinder walls are scored which effectively channels oil up the cylinder wall past the damaged rings and into the combustion chamber.