Re: 600 w
The correct oils have secondary effects that you should be concern with in your car.
Remember cleaning your axle housings?
They were coated with this smelly stuff. That is the side effect of this oil. It coats the inside of the axle housing with a rust proofing. The unvented housing will get condensate on the metal. This can cause rust flakes which would not be good for your bearings.
Does stp or the others thinner oils do this?
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