Hey everyone I have been looking at doing the 6.0 swap for sometime now but I was wondering what mileage difference there is between the two. I searched for this a few times but didnt find what I was looking for. I baby my truck so I figure it would be about the same, maybe better. Any of you guys with experience wanna post up? Right now I get around 13/city 15.5/hwy with the mods in the sig... Thanks-Mike

 

if you put in a 6.0 with a nice cam package(nothin too big)with headers etc and a GOOD tune you will stay about the same...seeing you'll have more low end to help you out with gettin ur big truck goin...plus gas is cheap now so go for it

 

ecsb 2wd. 3.42 rear. 12.8 combined. well over 20 pure highway. 11.5 all city playing around.

 

damn my tune is still screwed up but i got 10.7 on ecsb 07 3.73 6.0 ls6 cam and yellow springs! but well over 20 on hwy! well maybe i got on it a few times haha

 

haha a few times? im goin to put a throttle limit on yours... maybe 20%

 

Im surprised the highway mileage is that much better, so are you guys running the lq4 or lq9?

 

20 highway? damn. my ****'s mostly stock and i average 12mpg, driving hard, babying her, towing, doesn't matter.

 

mine is about the same, maybe a little worse in the city, but not much. My converter made the biggest drop in the city of anything

 

city kills, specially with an off tune. Im still a 4.8 (for now) and Im getting aroung 12 city and easily 20 if its all highway.. and thats averaging 85-100 mph.

Im putting the same cam in my 6.0 and I dont expect a drastic difference except the 1st couple months its in

 

what gears are you running if you can get 20mpg going 85-100