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  1. #1

    Default Hypertech Max Energy MPG's

    So I have recently installed the Hypertech Max Energy on my '99 5.3L Sierra. I set it up for regular fuel tuning, adjusted the tire size, and shift firmness and left everything else alone for now.

    I've only had one opportunity to do a real accurate MPG test, but on that one I saw a increase from 11mpg up to 13.8mpg driving at 60mph. To me this is a more than satisfactory gain, considering some people have reported no mph gains.

    My question is, to those of you who have the Max Energy installed, is it worth it to run the Premium tuning? That is, has anyone seen a increase in MPG from switching from the 87 to 91 octane tuning?
    '99 GMC Sierra 1500. Hypertech Max Energy, K&N Cold Air intake, Catback custom dual exhaust, 35" Toyo Open Country M/T's on 16" rims, 4" leveling lift kit.

  2. #2


    I agree that 2.8% is well worth it! I had the Hypertech on a '96 350R Chevy I had and got close to that. I never tried the "premium" though. Good luck!

    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  3. #3


    I'm actually experimenting with this right now. I started filling up with premium a couple weeks ago, and I changed to the premium tune last week. I actually haven't seen any improvement in gas mileage at all compared to the regular tune. It does seem to run a little smoother and maybe have a little better "get up and go", but the mileage stayed the same.

    Of course, I've been less and less "fuel concious" lately, so my foot may have gotten heavier as well. Definitely not a scientific study, but that's what I've found. I'll probably stick with it unless gas prices start to go back up again.
    Hallsville, TX

    2005 Silverado 1500 LS Crew Cab 5.3L 2WD
    Magnaflow Exhaust
    Hypertech Max Energy Programmer
    Suspension Leveling Kit
    Putco Element Window Visors
    Carriage Works Billet Grille
    TruXedo TruXport Tonneau Cover

  4. #4


    Welcome to the site by the way!

  5. #5


    I just got the max energy programmer, and all i did was program the "regular" fuel setting. left everything else alone, i gues si was originally under the impression that it would tell you your MPG..not some obscure way to figure it out.
    wasnt sure if i wanted to mess with the shift points/firmness/rpm limit. anyone got some good points to set it to?
    2004 Silverado Crew Cab-z71-4x4-5.3-100k+ miles-KN FIPK Stage 2 CAI-Flowmaster 40 muffler w/ dual tip-Apline deck/alpine amp, Pioneer components front/Pioneer Back/2x10" MTX Subs under rear seat-Cooper ST tires

  6. #6


    I have mine set to premium. I know I only have a v6 but I mainly do city driving and drive it hard most of the time. I got 19.7mpg last I checked.

    - '07 Silverado Classic - 4.3, 5spd, reg. cab, short bed, 2wd, silver....Magnaflow, K&N 63series kit, Hypertech Max Energy, CFM Tech tb, 180* tstat, McGaughys 2/4 drop, 275/55-17 tires(stock painted rims), billet grill, Pioneer cd, Sony Xplod speakers/sub, 1000w Crunch amp. Jba headers and Wynjammer s/c coming soon!
    - '98 Grand Prix GTP - modded - *SOLD*

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