Dirty or contaminated oil system. Sticking piston rings or valve lifters.

Consumer solutions

Motor Cleaner

Only use for oil system

Wynn’s Motor Cleaner is a highly concentrated detergent, designed to clean all oil lubricating systems prior to oil change.

Engine Flush

Only use for oil system

Wynn’s Engine Flush is a highly detergent concentrate, designed to clean all oil lubricating systems prior to oil change.