I can say this , I use M1 in ALL my turbo builds from 200HP to over 700HP nd have had no issues
We built roughly 35-40 race engines a year for dirt track and road racing among other engines for other forms of racing (dozens of engines yearly for race app) , Our customers have less issues with M1 then the brands they use to run and have engine failures , Till I have issues / engine failure from M1 I will be sticking with it ,
I use it in every Focus engine and trans I build and thats a lot , 10 years of building the Focus engine boosted and NA , find some one with an engine failure ???
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