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Originally Posted by Scagburner
(Post 4369392)
My 2008 Southern Comfort Conversion with 35 x 20 Toyos got 7-9 towing and 11-12 empty in stock form. I deleted the DPF, blocked the EGR, added a MPRP down pipe and exhaust, EFI Live tuning with the CTS monitor and got it up to where my 05 Duramax was stock. 11-12 towing, 15 - 16 empty.
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i used a friends 04 standard cab 4x43.73 gears 285 75 16 tires and the speedo was off 5 mpg with those tires.. ran from chicago to loto and back..hand calculated 21 mpg at 70 mph..with the speedo being off it got more mpg but the speedo rir not show the extra mpg because the speedo was a little off from the bigger tires..
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Originally Posted by CrownLPX
(Post 4369478)
My concern is you grant gearing that truck. Are you sure it's performing optimally?
Actually, its gets great fuel mileage between now and spring, it wont burn another drop! |
:picard1:
Originally Posted by FIXX
(Post 4369480)
i used a friends 04 standard cab 4x43.73 gears 285 75 16 tires and the speedo was off 5 mpg with those tires.. ran from chicago to loto and back..hand calculated 21 mpg at 70 mph..with the speedo being off it got more mpg but the speedo rir not show the extra mpg because the speedo was a little off from the bigger tires..
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05 Crew LLY, egr delete, cat delete, turbo mouthpiece, EFI live tunes by ATP, stock tires and gear. Gets 15-16 daily driving, 11 towing heavy. Highway MPG is directly related to speed/RPM, 16 at 80 but will pull 20 or better at 65.
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05 extra cab short bed. Intake, turbo mouth piece, straight piped, EGR block, lift pump, and PPE program at level 1. 15ish around town with some highway. 17 highway only and anywhere from 10-12 towing depending on how i drive. If i go up to level 3 the mileage goes up also...
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Ford 86 dually 4.11 gears here. 10 to 13 MPG empty towing 12000 to 14000 lbs 7 to 8 MPG. eXPECT ECONOMY TO IMPROVE A BIT once I DEAL WITH FRONT END ALIGNMENT some bushings are shot, as are my fingers today
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From another thread; applicable here:
Originally Posted by Sydwayz
(Post 4091289)
And a LOT can affect fuel mileage, so trying to do any comparison is pointless.
gearing cab size (standard/extended/crew/mega) bed size (short/long/flat/none/custom) drw vs. srw 4x4 vs. 2WD fat wife vs. skinny gf empty vs. a few tools vs. fully loaded towing mirrors vs. regular mirrors windows down vs, AC on bug deflectors tire size (height) wheel size (diameter) tire size (width) wheel size (width) windshield visor tonneau cover vs. open bed vs. cap vs. van body lift vs. stock vs. lowered Manual Transmission vs. Automatic Transmission How many Transmission gears? 4, 5, 6. more? Driving Style (biggest variable) |
ive never seen better than 10 towing with my 08 3500. BUT, but friends with 05 cummins. one friend has built motor, huge injectors,built tranny, 40'' tires, 10'' lift and hand calculated gets 24mpg highway running 80.... alot of it is in the custom tuning and making everything run in sync... but ya, ive never owned anything that gets 19 or so towing.
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I would think terrain, elevation and wind would have a lot to do with fuel economy. A god tune with deletes is about the best you're going to get.
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