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, ...
Q My daughter has a 2004 Monte Carlo SS with the 3.8-liter motor. It uses about two quarts of oil between 3,500-mile changes. At the last oil change, the shop wanted to flush the motor, saying it ...
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