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, ...
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Things you should never do to a high-mileage engine
High-mileage engines have settled into a specific mechanical rhythm that routine mistakes can quickly disrupt. Switching oil viscosity without understanding the engine's current state can cause new ...
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