Fuel Mileage............

[BIG JOE]

60 mph will get ya ran off the roads out here.

FWIW.. I've slowed to 62 MPH (1800 RPM), as much as possible, empty & towing. It's amazed me how many other drivers are doing the same. I hardly pass anyone anymore. 4+ bucks a gallon maybe ?

MY main reason for 62 is to see if useing the Torque curve makes any dif. So far I'm seeing lower EGT's (60/70*) and about a 1.5 MPG increase, Empty & Towing. Truck seems to "WORK" better, overall, too.

 

[Limishowman3]

450 mile trip to lubbock

On a full tank, I was getting around 530 miles when driving from my house near New Braunfels to Lubbock, TX. Let's see 530/35.5 (since i nvr let if run dry) thats about 14.9-15mpg. and thats sometimes avg 85mph for 130miles. And the rest at 80mph. I was getting 15.5mpg for a while when going 70-80mph. Only mods I have made to my truck is bedliner, K&N Cold Air Intake, and A superchip set to Performance aka no more than 4000lbs of towing. Was getting 14mpg before mods. I have a 99 old F350 7.3L V8 4x4 8ft long bed Supercab. Does anyone know of any other mods I can do to the truck to get better mpg.

Also today at the pump, I guy had a f250 shortbed supercab, which i thought he had a diesel, but he also said v6? with a bed cover. Says he gets 18-20 on highway and said his son has the same type of truck but with $5000 worth of mods, and get 26mpg on the highway. I wanted to keep talking but he had to leave. Any advice? I may want to trade my f350 in for a f250. Still need for towing cattle, hay, and boat though.

 

[treyloco]

You might want to put 4" exhaust, zoodad mod and delete your AIH. This will help to lower your egt's a little and let your engine breath better, which in turn you may see a small benefit in mpg's.

 

[Butch Cassidy]

21 -maybe 22 mpg - 50 mph, cruise on, a/c off, no weight in truck, even took off the tail gate. Mileage is good, ride is boring @ 50 mph.

Butch Cassidy

 

[JLDickmon]

21 -maybe 22 mpg - 50 mph, cruise on, a/c off, no weight in truck, even took off the tail gate. Mileage is good, ride is boring @ 50 mph.

Butch Cassidy

you keep thinking $4.90/ gallon $4.90/ gallon $4.90/ gallon $4.90/ gallon $4.90/ gallon

and 50mph will seem like you're hauling mail

 

[Doghead]

It was an expensive way to do it but when I replaced my transmission and converter I picked up 60miles per tank. That put me right around 18 mpg.

 

[Limishowman3]

Deleting your AIH?

What do you mean by deleting your AIH? Like what is it there for and what does it do/ look like and what will happen if I delete it?

 

[jto89]

I have a 2003 f350 7.3 supercab short bed 4x4 all stock i have seen a constant 15-16mpgs city and around 20-22 on the highway with the cruise set at 70 and the a/c on

 

[treyloco]

The AIH is your air intake heater, it is a heating element in your intake that helps heat incoming air while you crank your truck on cold days. And its also obstructs air going into your engine. There is a wiki article and pics on this site. The only thing you may encounter when doing this is ses light but dfuser makes a delete for this problem and they also sell a plug that you can hook your boost gauge to.

 

[Limishowman3]

So wont I have problems starting my truck in the winter then. Ill be up in Lubbock where its at or below freezing for most of winter. I can already tell it takes a while for my truck to start up there.

Damn all stock and ur 03 shortbed gets that type of mileage. I wish my dad wouldve bought then instead of buying the 04.