Manual states 10W30
i have used 5/30 in mine
Gear oil...usually 75w90 weight. I would use Royal Purple or any synthetic gear oil. That goes for both differentials and the transfer case.
5 WITH A NEW OIL FILTER.
the best oil to use is olive oil. It taste is perfect
between 1 and 2
gear oil but not sure how much
best oil to use in 7.3 diesel is rotella brand oil
The best oil to use is the one reccomended by the manufacturer.
80w90
The best oil to use is 5W-20, any brand.
4.56 or 4.10
I Use Chicken Oil!