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I have a toyota 4runner with a very tricked up 22r. It has about 25,000 on it since I built it, and I've only run M1 in it. I started with 15 - 50 ( I'm in florida), but also tried 0 - 40. the 0 - 40 had obvious performance increase, but on my last change I did the 15 - 50 again. I was towing a...

We've all seen the good and bad post's on Autorx... virtually everyone says it cleaned the sludge, some have pointed out the residual varnish still on the engine parts and the waxy crystals in the filters...hmmm. I got to thinking about it, and during re - orders I have discussed this with...

As an engine builder for almost 25 years, I have seen engine designs change in ways that really requires clean oil and diligent maintenance. One place is the pickup screen. Prior to 1995, most pickup screens, if not all I'd seen were at least 3 to 4" diameter, with generous surface area. As of...