I'm debating Mobil1 75W-140 or Ultra1Plus SAE 80W-140. I bought Nitro 4.56 upgrades and their site sells "Nitro" 80w-140. But tractor supply sells UP+ so my question is should I just go with tractor supply or stay with Mobil1 and or go a different weight? TYSM in advance
Rear diff dana44 m220...
