Ok, so I recently drove 770 miles and used around 45 gallons of fuel, which is around 17.1 mpg

recently I swicthed from mud/heavy lug tires to some nice open all terrain tires.... now I calculated out my fuel econemy for that last tank of fuel ... mostly in city but good freeway also.... now getting an impressive 20.6 mpg.....

my truck is a 7.3 IDI n/a 4spd 3.55's and 315/75/16 Cooper Discovery AT/3's .... they sure do ride smoother than my dunlop mud rovers....and there quieter also...

whats your fuel eco like ... numbers are great ....wondering if you turbo guys are getting any better ???

 

1996 f350 psd, CC e4od 3.55 rear gear bangs out 20-21 on the hwy, 12-13 w/ 12,000lb 5er.
1977 C/30 CC dually 7.3 idi, e4od, 3.73 rears, 16-17 on the hwy, 12-13 w/ 12k 5er, go figure.

Thats all I got
Daniel

 

87 f250, 6.9,t19,3.55's, 285/75/16 tires. Gets consistant 13.7 mpg. I hear about others getting high teens. I ain't never seen that much.

 

chris... your spinnin engine fast thats why..I had the same issue with my factory size tires.... now I have 35's and its better...if ur's is 4x4 you can do the add a leaf and 35's will clear just fine no lift needed....

 

I'm only getting about 12mgp on my 91 f250 5 speed. I wish i was getting more, how are you guys getting so much?

 

well i have 3.55's and 35" tires .... a 4 spd and I run the B5 diesel from shell ...(it says up to 5% bio).... about every other tank i throw 1/2 qt of atf in the tank to clean the injectors up and it always turns out great... I'm also running Royal Purple 15/40 full synthetic oil and a Wix filter ...... I run the beans out of it as well I wont shift before 3k on the tack and most of the time I wont shift till I hear the govenor..LOL..... they love to be romped on.......... I got told by the international dealer and my locan diesel fuel shop (where I get my injectors and IP's from) just run the beans out of it and it will love you...... like a detroit diesel ... slam your finger in the door and drive angry all day

 

speedo doesnt work but a good guess is 14.5 mpg 94 7.3 idi nonturbo with a 5speed 411 gears 286r16 a/t tires 45lbs of air and thats driving like grand pa would.