The right differential oil for Subaru Forester
I note in the 2004 Forester Owner's Manual that the front differential uses API GL-5, but warns that: "Each oil manufacturer has its own base oils and additives. Never use different brands together". Seems to say I have to either find out what Subaru uses or go to Subaru and get it directly from them. Then too, "each oil manufacturer" may advertize where their product can be used.