I was getting 15.5 MPG out of my 1999 F250 7.3 PSD SUPER-CAB LONG-BED. I was adding 2oz of acetone for every 10 gallons of diesel to my 1999 F250 truck.

i installed sct extreme and deleated the dpf im seeing 14-16 in town and 18 to 20 on the hiway just hope that nothing serious goes wrong and and they catch on to my programer other then that the power is awsome :c:

My last tank full of diesel only gave me 12.43 MPG in the city, that was my worst tank full to date, I have been getting 13.9 to 14.4 MPG in the city !!!:humm:

Hey Stud 08,
Is your truck a 4x4? I just bought my 08 F250 6.4L 4X4 and I get 12 mpg on the highway empty. New to site so looking for tips, scared of the DPF Delete due to warranty. Just installed a Hypertech max energy last night so i will see if it helps. Bought a Bully Dog Triple only to find out that they have not even written the program yet for the 08 (sent it back of course). In case ya'll thought you read it wrong i'll say it again 12 mpg on the highway!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I dont know what programmer to get, SCT or Spartan for my 08 6.4? Wanted to ask some others about them what do you guys think?

I just installed the Spartan tune on my truck tonight. It is stupid fast for a 9000 lb truck. No idea on mileage. Didn't really care much before still don't really care, but an improvement will be nice.

I keep hearing that SPARTAN is the best !!!!!!!!!!!!!!