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does anyone know what grade of oil i should use in my 04' sti? im looking at millers. i dont use the car hard or do any track days. will millers 10w/40 be ok?
i always used 5/30 w as recomended in the book but i went in to tsl to pick up a new green filter and as it was about due its in between service oil change i got them to do while i was there and they put 10/50w in it why ???