It seems there is an endless debate on the internet with no real conclusive answers regarding what gear oil is OK to use when "SAE 80 GL-4 Hypoid Gear Oil" is called for. I am almost to the point of using Royal Purple 75W-90 that is GL-4 and GL-5 compatible. It seems ridiculous to me that Yahama's own website where the fluids are sold doesn't even show a compatible gear oil. My dealer, of course, doesn't have Yamaha gear oil so I am really confused.
What are you guys using?
What are you guys using?