I just got done changing the oil and changed the front and rear diff as well. I was at the dealership today, not one I'v ever gone to they just happened to be the closest one where I was at today, and they sold me two 8 oz bottles. Well as most of you may know it takes about 17 oz or a tad more to do the job. I asked the guy behind the counter to check to see how much I needed and he told me to look at my owners manual!! Or I could bring it in. What a tool bag. Anyway, I have some Bel-Ray synthetic 80-90 Hypoid gear oil here. Thought I might just top off the front diff with that. I don't need to ride it anytime soon, and I can swing by another dealership if needed. So no real need to add the Bel-Ray if that would create a problem. Thoughts? Useful input?