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, ...

Dear Car Fix: I have a 2004 Kia Spectra, a four-cylinder with 54,000 miles, and a 2009 Kia Rondo, six-cylinder with 4,500 miles. So obviously they are not driven much. Recently I went to the local car ...

There are a few different solutions you can use to remove sludge and other contaminants from your car's engine, but soapy water should not be one of them.