Re: OT: Real world Diesel Mileage?

Posted by thejdman01 on August 16, 2005 at 15:55:28 from (205.188.117.6):

In Reply to: OT: Real world Diesel Mileage? posted by Dug G. on August 16, 2005 at 09:42:16:

the 15mpg is possible on the semi. i have run an n14 celet plus geared low running down 39 flat terrain and got 8.3 but thats about the best your going to get. reason i say 15 is possible is that if you had it tuned had a pittsburg power chip on it, ceramic coated pistons etc etc if you had a 60000 dollar motor in it very possible. i forget and somone will help me out im sure that dodge cummins that banks built the fastest truck in the world was diesel and that i believe averaged 24 mpg and had 1200 horse(again dont remember somone may remember exact numbers getting too old believe those numbers are close but not guarenteed. its all about the thermo efficency of the motor. again not likely at all but possible. if its there ive never seen one but possible. back to the question had a 6.2 with a 5 spd 3.43 rear end and that got suprisingly 16-18. my 96 6.5 1 ton will average around 12-15 mpg (but i do pull goose necks, alot of idling when putting up hay etc however not much hay to put up this year) with 4.10 rear my truck has a gm8 turbo with a number 9 calibration resistor and i pull stuff for work 3x a week. wifes 93 6.5 3.73 rear end only gets 16 and she doesnt pull alot besides farm. no pulling for her job but she does around the farm. had a duramax for one job had 19. terrian nut behidn the wheel and city/county trailer (goosneck vs enclosed camper) make huge differences. really so many variables.

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