I have been using Berryman's B12 to clean my engine. I pour in a half bottle into the crankcase, run it for 15 minutes, then drain it c0mpletely, then complete my oil change. But I just bought a brand new 2018 Toyota Rav4 and it uses 0W-20 synthetic oil this is thin oil. My question is, should I continue this process with this new close tolerance engine, or not? Thank you. Jeff Baldwin, baldjeff@comcast.net