Recent content by APTOSJAMES

Is there a list of GL-5 of differential GL-5 oils that are non corrosive to yellow metal. I.e.brasd, bronze and copper, Most GL-5 oils use sulfur based modifiers. . The only one I have found claiming to be non corrosive is Royal Purple IS MAXGEAR 75W/90 GL-5. They claim to be non corrosive to...

Please only use the most expensive BMW approved oil you can find even if you only need 50 grams, To entertain yourself call your BMW dealer and ask how much they charge to purchase a new differential—- and install it. It will be $xxxx.00! Light hearted reply. Please be careful of the on line...

I understand GL-4 single rating will provide the best performance for manual transmissions. GL-4 also does not generally have sulphur which is corrosive to any transmission with bronze or brass components, The lubricating qualities for GL-4 actually will provide smoother shifting in a standard...