Ideas on better mpg

[freightshaker120]

I've got a 93 F250xlt extended cab 4x4 long bed with 4.10gears and 7.3 that was originally a n/a but a previous owner put on a complete banks sidewinder setup currently running a 6'' suspension lift with 35/12.50 it seems lately my mpg has gone down to about 350 miles out of both tanks does this sound about right or can I get better the truck only has 81k on it and I've had it for about a year starting to think it has something to do with the fuel available now

[Rob]

the light foot mod will help! i get crappy MPG too, i think its the winter fuel.

[Rob]

welcome to the .ORG by the way!

[freightshaker120]

Thanks for the welcome I save the heavy foot for my car hopefully the summuer fuel mix will yield better mpg

[Rob]

yeah i know how a feel. i lost 2 to 3 MPG i think. it sucks. i may try a hottertune to see if it helps me out. i heard the hotter tunes get better mileage with a light foot.

[craig long]

what is the winter fuel and what is the reason? thanks

[freightshaker120]

Winter fuel is the ratios they use to make fuel it varies from summer to winter my big truck has also lost about 1.5mpg it's down to 5.5-6.0mpg now

[crankme69]

Checked your tire pressure lately?

[dieseldan2005]

I have also been having really poor mileage. My last tank was 13.3mpg. Considering my mods i hope i do better this summer. Try adding some powerservice to your next tank of fuel, it'll help with that junk ULSD. Also welcome to the ORG! Do you drive a freightliner FLD120?

[freightshaker120]

No I've got a century class with a 525 N-14plus cummins 13sp and 3.58's. Tire pressures good the only thing that has added any improvement is 4-6oz of 30w non detergent motor oil