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Thread: Squeeze every gallon...

  1. Top Of Page | #1
    T1H5TA3's Avatar

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    Squeeze every gallon...

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    Who here is in the 700 mile per tank club?
    I had a lot of twisty hilly back roads , slogging along in 2nd or 3rd.. ( I need a tighter converter!) On this last tank...
    I'm hoping to be in the 800 club soon!
    Took 35.5 gal to top off.. 20.8mpg...
    Not bad for a beat up ¼ mil mile beater!


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  3. Top Of Page | #2
    T1H5TA3's Avatar

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    Re: Squeeze every gallon...

    And yes, before some one asks...... Yes I'm adjusted for tire size....
    GPS puts my trip within a mile of the overhead .


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  5. Top Of Page | #3
    Power247's Avatar

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    Re: Squeeze every gallon...

    Not bad! I gave up my quest for 20+ mpgs when I went 35" tires. Congrats to you though!

    Greg
    2012 | RAM 2500 | CCSB | MM3 tuned by Double R Diesel
    2016 | Heartland Pioneer | DS310

    Greg
    2012 CCSB Big Horn 4x4 68RFE 3.73|FLO~PRO|SIMS|Edge Insight CTS|XRT Pro w/MCC by Double R Diesel|Infinity|JBL

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  7. Top Of Page | #4
    RamIt's Avatar

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    Re: Squeeze every gallon...

    My 4th gen was all over 630-650 on the highway. This 5th gen struggles to break 500 in stock form & daily driving, my average is about 430

    A tune will fix that though


  8. Top Of Page | #5
    cumminsdieselfreak's Avatar

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    Re: Squeeze every gallon...

    Quote Originally Posted by Power247 View Post
    Not bad! I gave up my quest for 20+ mpgs when I went 35" tires. Congrats to you though!

    Greg
    2012 | RAM 2500 | CCSB | MM3 tuned by Double R Diesel
    2016 | Heartland Pioneer | DS310
    Can you not get 20+? I'm on 35s and in the mountains and can get 20+ on highway runs.

    Current: 2018 2500 G56 Off Road. 2.5" RC Leveling Kit W/ 35" Cooper AT3 XLT. LUND Camper Cover W/ Thule Roof Rack. DRD Happy. AFE Magnum Stage 2 Intake. 5" Stainless Exhaust. Lost Some Weight At 920 Miles. Amsoil 5w-40 Signature Series & Amsoil Oil Filter @ 1,300 Miles.
    Sold: 2013, 2007.5, 2007, 2006, 2002, 2000
    For whosoever shall call upon the name of the Lord shall be saved - Romans 10:13 KJV

  9. Top Of Page | #6
    Booch035's Avatar

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    Re: Squeeze every gallon...

    Quote Originally Posted by T1H5TA3 View Post
    Click image for larger version. 

Name:	IMG_20190910_192546.jpg 
Views:	67 
Size:	107.2 KB 
ID:	9020

    Who here is in the 700 mile per tank club?
    I had a lot of twisty hilly back roads , slogging along in 2nd or 3rd.. ( I need a tighter converter!) On this last tank...
    I'm hoping to be in the 800 club soon!
    Took 35.5 gal to top off.. 20.8mpg...
    Not bad for a beat up ¼ mil mile beater!
    What year you running? What size tank you got? Thought the biggest the cummins ever came with is a 34 gal tank?

    2019 3500 Big Horn Dually, 6.7L Cummins, 68rfe, 255x80x17 St Maxx's.

  10. Top Of Page | #7
    Power247's Avatar

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    Re: Squeeze every gallon...

    Quote Originally Posted by cumminsdieselfreak View Post
    Can you not get 20+? I'm on 35s and in the mountains and can get 20+ on highway runs.
    I can get close to 20 if 100% highway driving and keep it at 70 or below. For comparison, my truck has 3.73 gears and a live front axle which doesn't help.

    Greg
    2012 | RAM 2500 | CCSB | Custom tuned by Double R Diesel
    2016 | Heartland Pioneer | DS310

    Greg
    2012 CCSB Big Horn 4x4 68RFE 3.73|FLO~PRO|SIMS|Edge Insight CTS|XRT Pro w/MCC by Double R Diesel|Infinity|JBL

  11. Top Of Page | #8
    T1H5TA3's Avatar

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    Re: Squeeze every gallon...

    Quote Originally Posted by Booch035 View Post
    What year you running? What size tank you got? Thought the biggest the cummins ever came with is a 34 gal tank?
    I updated my sig.
    I have factory 35 gal with the +5.5gal rpo code, it modifys the vents or some thing, but I can get 40 in if I'm on fumes...

    My 03 used to pull 800+ on a regular basis.
    4x4 4.10s 35" nv5600.....

    08 r2500 quad cab 4x4 - Ugly Betty
    Deleted, AFE , 5" strait pipe , DRD Tuned
    68rfe, bonded, pressure kit , ultra tight
    Rear axle - 4340 chro-mo shafts Grizley Locker 3.73's
    Front axle - 4340 chro-mo shafts, FreeSpin kit, TrueTrack,
    20 x 10 XD wheels, 35" Patagonia's
    IronCross bumpers F/R, BedSlide, Canopy, RamMounts , etc.

  12. Top Of Page | #9
    Basic Member 03 unicorn's Avatar

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    Re: Squeeze every gallon...

    Quote Originally Posted by T1H5TA3 View Post
    I updated my sig.
    I have factory 35 gal with the +5.5gal rpo code, it modifys the vents or some thing, but I can get 40 in if I'm on fumes...

    My 03 used to pull 800+ on a regular basis.
    4x4 4.10s 35" nv5600.....
    Ok I need to know what you did to get 800 on a tank. I have an 03 2500 nv5600 4x4 with 3.73 and stock size tires


  13. Top Of Page | #10
    T1H5TA3's Avatar

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    Re: Squeeze every gallon...

    Quote Originally Posted by 03 unicorn View Post
    Ok I need to know what you did to get 800 on a tank. I have an 03 2500 nv5600 4x4 with 3.73 and stock size tires
    That truck was a R&D test mule / Dyno mule... Lol
    Over the course of 3 years it prob made 1k pulls on the Dyno, wore I don't know how many different turbos , and beta tested and developed slot of software for several major players in the industry.

    In my "normal " 750hp daily driver form it typically had some hybrid 120+ hp injectors and a custom 66mm turbo....
    In that same form is how it also got it's best economy....
    It liked RPM, If I kept it above 2k it was happy, closer to 3 it wanted to start to work, at 4k it wanted to party.
    Proof that people that love to lug the motors don't understand volumetric effiency...

    My best tank ever was 850 ish doing 80+mph from Seattle to Montana and back.

    Triple Nickel motors were the fuel economy Kings if properly tuned!

    08 r2500 quad cab 4x4 - Ugly Betty
    Deleted, AFE , 5" strait pipe , DRD Tuned
    68rfe, bonded, pressure kit , ultra tight
    Rear axle - 4340 chro-mo shafts Grizley Locker 3.73's
    Front axle - 4340 chro-mo shafts, FreeSpin kit, TrueTrack,
    20 x 10 XD wheels, 35" Patagonia's
    IronCross bumpers F/R, BedSlide, Canopy, RamMounts , etc.

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