I see, I see.

Cowboy Steve

 

dude, that mileage sucks for a pick up. Is that empty? I have been surfin this forum cause I might buy another truck.

Theres only like 3 people on here(that I have seen post) who get better than 15mpg w/ a 6.4, but you haven't even broke into double digits..........

I commend you for your honesty............

ra

 

That is mostly empty. I towed my empty trailer (10K lbs) for 30 miles on the first tank and about 140 miles on the fifth tank. The rest is normal everyday driving like I would drive my car, 70% city and 30% freeway. My '04 V10 F250 got 11.5 mpg doing the same type of driving but 6-8 towing @ 70mph. This truck is much more fun to drive and gets tons of looks! Some mornings I uncover it and drive it to work "just because".

 

70% city driving would explain why he hasn't broken double digits yet. Chances are it's regenerating more often because I'm assuming that you (Mikey) don't get to open 'er up as often as others who drive backgrounds and highway a lot?

 

It may have to do with the 4.88 rear end, but just a guess.

 

'08 F450, Crew Cab dually, 4.88, auto, 4WD. My only disappointment with the truck thus far is the mileage. I'm averaging around 10 mpg empty. Towing a 28K load (36K combined gross) put me down around 7.5, towing a 24K load (32K combined gross) had me around 8.

I usually drive between 65 and 70mph. If I drove around 55 I think that I'd get around 11 - 12 mpg empty.

My '05 F350 Crew Cab dually 4.11 rear end ratio 4WD averages around 13.5 combined city and highway. I can get up to 16.5 mpg with it on the highway at 55.

My advice - get the 4.88's only if you routinely pull in excess of 20K lbs. Anything less than that, get a higher rear end ratio for better mileage.

 

I have about 2000 miles on mine, getting 12mpg around town. Won't pull my car trailer until Oct. but hope to get 9mpg with it loaded. I have the 4.88s 4x4 DRW and same as Big Sky's thoughts on it, felt this was the rig for the next bigger trailer not the one I have now.

I don't drive the truck that fast so the 4.88s are not an issue. I have a Corvette for my speed fix, the F-450's there to haul it from A to B.

A 4.56 gear if available, may have been my second choice knowing what I know now. I'd like to have my crusing rpm closer to 2000 vs at 2500 I get with the 4.88s.

 

I have normal regen cycles... I have had four (that I know about) in 1800 miles. You can still lick the tailpipe! I drive with the cruise set at 70 mph on the freeway. Today I was doing 80 mph for a while. It is just a big heavy truck with a low rear end gear.

 

I second that opinion. Unfortunately any gear swap in these bad boys is going to be real expensive. The differential is a single piece, you will not be replacing just gears.
Gear Vendors would be a cheaper solution.

 

I have a F450 4x4, Auto with 4:30's. Pulling a 18K+ 5th wheel north to Alaska. Getting about 8-9 mpg. Empty I have seen it close to 15. have almost 4K miles on it.