Picked up an 09 Silverado 4x4 with the 4.8 as a spare vehicle for snow, etc. It has 97k on it and I will only put around 5k or so a year.
I'm going to change out all the fluids.
Power steering - Maxlife
Front and Rear Axles - Mobil 1 75w90 $10 a quart on amazon
Trans - First i'll suck out the pan and do a fill, wait a few thousand then do a pan drop and filter change
Transfer case - drain and fill
Both the trans and transfer case call for DEX6. I found on amazon a case of regular mobil for $80. Walmart has their quarts of Supertech DEX6 for $4.26.
Will the supertech do as well as the mobil (not mobil1)?