F550 Mileage

What is an average expected mileage for an F550 with 4.88 gears in town and highway empty and also loaded on highway?

Terrible.

I'm not sure what mine is getting, haven't figured it but ive compared it to my other trucks. With the driving, and idle time mine sees its not getting 10mpg. I'm betting close to 8mpg.

my 2000 gets around 8 when running around the farm and town. I rarely shut it off though. When I have to go on road trips with it I get from 10-12 depending on how fast I am driving. Slowing down from 65 to 60 makes a big difference.

Also truck is completely stock. No chip or anything. Running a 245 tire though instead of stock 225

EDIT: I should add that this is a shop truck loaded with 100+ gallons of fuel, welder, air compressor, Tools, etc. Prob close to 13-14k gross weight.

Our 03 with an 11' aluminum dump bed gets around 10. The 4.88s don't really like the highway either. Forgot to add its a 6.0.

Well I guess I can't complain then, getting 10mpg in town with a real light foot, but I forget this thing weighs 11,000lbs.

I had a customer call about this yesterday, he said he was getting 8mpg on avg and wanted to get to 11. Basically the gears are the main killer.

In town my really sucks. I dont drive it in town too much though. On the road unloaded when it was stock 11-11.5.
4.88's are the killer, but they are great for pulling heavy stuff.

Our f450 gets 12-13. Its on swamps hot tune all the time stock injectors. 4.88 gear

Our 6.4 F450 2wd gets 8 in town 10 highway Deleted Pdf and tuned. 4:88 suck azz. Looking to do a gear swap this winter. Would like to see 12-15 but not getting my hopes up.

Rodslinger said:

Our 6.4 F450 2wd gets 8 in town 10 highway Deleted Pdf and tuned. 4:88 suck azz. Looking to do a gear swap this winter. Would like to see 12-15 but not getting my hopes up.

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Slow down and you will get above 15.

tbsimmons said:

Slow down and you will get above 15.

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Thats the biggest factor in mpg's. 4.88's are hardly a highway gear so drive accordingly.

Need a tune?

^^lmao.

6point0damn2004 said:

Thats the biggest factor in mpg's. 4.88's are hardly a highway gear so drive accordingly.

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Slow down to what?? 50? And get ran over? That's at 65-70. It has wide opens tunes. If it had a 4:56 or 4:11 I feel 12-14 mpg will be had.

tbsimmons said:

Slow down and you will get above 15.

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If I drive 50 and it still gets 10. It has Wide opens tunes. It just need a set of taller gears to make it happy on the highway.

My 550 6.4 that im building has 488 in it. Im going ti swap it to 410 before it ever gets tagged. Plus that way it will still be quick on the street lol

Something is up then.
If I drive with Innovative X-Street I can get above 17 hand calculated (Dash says around 20 a couple of times) if I drive about 60-65. Anything above that and it drops. If I drive with the Tow Tune or normal Street I get 1-1.5 less.

My 2000 F550 got between 10-12 mpg empty
Towing 8-10 mpg depending on terrain & weight

They really benefit from a gear vendors

Can't tow heavy with a gear vendors so that kinda makes them pointless on a F550. Besides for the money you'd spend on that you can easily have a new gear set.