Are these necessary repairs, reader asks? Q: My sister took her 2000 Buick Century into a garage and asked them to look into an odd pinging noise. They diagnosed it as a clogged EGR valve, but they ...

An engine flush washes the gunk out of your car's engine – and most cars will never need one, says an engine expert. "If you do your oil changes regularly you shouldn't have a need for an engine flush ...

So, you’ve heard about engine flushes, right? They promise to clean out all that gunk and sludge that builds up over time. Sounds great, but not all engine flush products are created equal. In fact, ...

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, ...