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    20/50 Oil in an Evo? Partially Explained

    I own an evo 9 and have found a few problems with the 4g63 motor,the first is the sump is too small and not baffled enough,the second is the oil thermostat letting lots of oil through to cooler at the wrong times,the 30 weight oil is to thin ,when the evo is changing dirrections rapidly,,no...