Remember thicker oils cause powerloss. I run 20W50 in my F-150 and can gain about 10-15hp by going back to 5W30 from what I understand. Like running onthe ground vs in a pool.
My old C5 ran 5W30 M1 factory and the WRX uses M1 5W30 too.
If I use dino oil, I do with Valvoline.
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
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