I Have Never Had A Diesel That Has Been Affected MPG Between Gas Stations Producing The Same Standard of Diesel.. Honestly It Can Range Between 5MPG Depending On Where I Stop For Diesel. -

HVACguy's Sig:

2008 Ford F-250 Harley Davidson Edition Series-Sequential Turbo Diesel

TDC
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My 2008 F-250 6.4 SUPER-CAB LONG-BED 3.73 gears, is giving me 12.8 to 14 MPG in the city, at sea level, I only have 1,423 miles. -

gunman41mag's Sig:

MEMBER- BLOWIN' SMOKE GANG
2008 F250 6.4PSD SUPERCAB LONG-BED 2WD
2007 ARCTIC CAT 400 4X4 FIS

all the diesels should be getting 20 + MPG's if they did not have all the restrictions -

89silverbullet's Sig:

john
89, auto, diaphram turned, pump turned up, bhaf, straight piped
97, 5-speed, fuel plate #10, k&n intake, glasspacked

My best MPG for this tank full was 14.36 in the city, I now have 1,643 miles on my truck !! -

mine gets about 10 in the city and 14 hiway its got 13200 miles on it ive herd add fords fuel sup and increase fuel milage 2-3 mpg i dont know though ive never tried it -

stud08's Sig:

stud

I haven't added any additives, What I'm going to do is add a better air-filter & see If I get better MPG. -

im averageing around 14 hiway and 10 around town -

Mine is about the same as stud08 - I got 31,000 on mine and has been that since i got it in Nov 07 - I've been a die hard Ford fan since I was knee high to a short grasshopper but somebody hit it on the head with the term 'powerJOKE' when it comes to the 6.4 - that's just my opinion and you know what they say about opinions............. -

txredman's Sig:

2008 F350 Crew Cab Lariat 4X4 PSD
1989 C350 Bronco Crew Cab 4X4 460 CID