I'm not an expert in gear oils, I just try to gain anything I can from what I read here, but looking at Amsoils gear oils, for instance
75w90 Severe
75w90 Long Life
80w90 Gear Oil
What is the real difference between all of these? You have two which are the same weights, and one that is an older common oil. They all recommend 100k normal, and 50k severe intervals. I'm assuming that Amsoil markets them as Best,Better,Good in the same order as above, but in real life, what are we looking at here as far as different applications or quality or protection?
75w90 Severe
75w90 Long Life
80w90 Gear Oil
What is the real difference between all of these? You have two which are the same weights, and one that is an older common oil. They all recommend 100k normal, and 50k severe intervals. I'm assuming that Amsoil markets them as Best,Better,Good in the same order as above, but in real life, what are we looking at here as far as different applications or quality or protection?