Best Engine Flush for Buick Owners Before Oil Changes
Neglecting the internal cleanliness of your Buick’s engine, especially the sludge-prone 3.6L V6 or the older 3800 Series II, often leads to the dreaded “lifter tick” or premature timing chain wear. After seeing how quickly dirty oil can degrade the VVT solenoids in newer Enclaves and Regals, I spent six months testing twelve different formulations…