Yours truly has a neutral opinion regarding engine flushes: I believe engine flushes are only necessary when the engine has sludge buildup. Sludge is a dark and thick substance from contaminated oil, ...

Adding an engine flush to your oil change routine can help remove sludge and buildup. Photo credit: David Traver Adolphus / ...

The need for marine engines to run on a clean source of fresh water is common. Saltwater boaters should regularly flush their engines with fresh water to stave off internal corrosion. Also, the ...