Quote:
Originally Posted by leontige
Hello sikolene 5w-40 and 15w-50 are the same quality just different sae?Also what to prefer 75w80 or 75w-90 for gear oil?Are 75w-80 fully synthetic?Thank you
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Yes with the Pro S and Pro R it is just a viscosity difference.
I usually recomend synthetic 75w-90.
Cheers
Guy.