I was wondering what type of gear oil some of you guys run in your differentials (non VLSD). Specifically the weight. I know that nissan recommends 80w-90 if the ambient temp is below 104, but I live in phoenix and its going to be 110+ for the next month or two, so do you guys think i will still be alright with the 80w-90? I dont think it should be a problem if its only for a couple months but still, what expirience have you guys had with this? Specifically you hot climate people.