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I have the oil light going on in my 2003 Toyota RAV4 with the 2.0 AZ-FE motor. It has 185,000+ miles. If I were to pour your Chem-Dip in the engine and let it sit, would it hurt the engine bearings or eat anything else I should know about? How long should it sit for before draining it out? Would squirting air into the engine help swish chemical around? Thanks.
Neither variety of Berryman Chem-Dip (part #0905 or part #0996) is suitable for the application you’re suggesting as they both contain water in one form or another. If the engine runs but has severe sludge, a better bet would an engine flush. We offer Berryman Oil Change Flush (part #1216) designed for that task. Berryman B-12 Fuel Injector Cleaner (part #0116) can actually go into the crankcase, too, at a ratio of 1.5-2 fl oz of product per quart of oil capacity. 0116 is the more aggressive cleaner of the two. Note that if the problem is especially severe, you may need multiple applications.