Well I have my to do list for my truck come winter break and am in the process of getting everything I need. I plan on changing my rear differential gear oil. It's 3.55 non-limited slip so all I need is gear oil. I want recommendations on brand. I'm between Valvoline, Mobil1, and Lucas. Thoughts? (they're all about the same price so it doesn't matter to me, just want to know what you guys think is the best brand and what will last the longest/perform the best). Thanks!