blacksheep10
XBJRA champ/ 555 and team Nasty codriver
wow, who thought going to synthetic in my drivetrain could be expensive like this when I don't do the front end and have a hookup on everything else. I am going royal purple engine/transfer/rear end and castrol syntorq (have to) in the nv4500. We'll see if I pick up any mileage at all. I'll get back to you on the mileage. Here is what I have gleaned from observing and listening. Luke (cash talk's) father in law picked up 1.5 mpg on his duramax pulling his big ass camper when he switched to royal purple. the people that sell the stuff claim 3. I have talked to and read about first hand accounts of 1-2 mpg gains depending on driving style. Its worth a shot to me, especially if it last longer before it breaks down. I'll go 5k miles on this change and come back with the averages of all the tanks.
TO THE SHOP!
TO THE SHOP!