OP
OP
Dantheman1540
Full Access Member
I know the 6.0s are known for terrible MPG no matter what you do, I swear I really don't drive aggressively 99% of the time. I'd say no more than an average of 1-2 WOT pulls per tank of gas. (Many tanks see no WOT just commuting and rarely in traffic mostly 2 lane 55mph roads.) I guess I'm just a tad disappointed a 10.5-1 CR motor, sipping 93 with a mild cam (Had the even milder 212/218 before) motor hooked to a 5 speed with a better OD than a 4l60, 3.42 gears, 2wd, lowered, and small street tires doesn't do better. Only thing I can think that really hurts it is displacement obviously but the 6.2s do better, or the lift of the cam. It's always had a "High lift cam .600/.600. Roger Vinci and BTR seem to be pretty firm believers in Higher lift hurts mpg even if the heads flow good enough to make use of it. I also assumed the parasitic loss of the manual trans would be better than an auto but the 14b axle probably helps negate that.
I wish the new regime would loan me 5k in the name of global warming so I could swap to lighter wheels, Michelin tires, Low lift cam, big front lip, and a week off so I could work on a lean cruise tune and really see what I could get out of it. Oh, and of course the regime would need to forgive that load after the fact.
While it's fun to commit keyboard science it's not worth putting my own money into.
