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I just got off the phone with Royal Purple, while i know they dont have 0-W40, I asked if there was a way I can leave a message or suggestion of making a 0-W40 for Porsche Boxsters and they said that they are already developing that weight cause there are alot of desiels and clean cars that use 0 weights for emissions, So soon we shall have 0-w40 from Royal Purple.
Right now Im using Royal Purple 5-W50 which is bad.... but the car does run much better than it with the correct weight of mobile oil. I've used the correct weights in my other cars i've had and that oil is nothing short of amazing... i mean it litterally polished my cams and bearings on my 1967 mustangs and 300zx TwinTurbos.
I just cant wait for the correct weight from RP!!!! I'll soon change my gear oil and will use the Royal Purple brand, especially since i have 103,000 miles on the syncros.
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