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Thread: Change in setup - better gas mileage?

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  1. #1
    Join Date
    Feb 2007
    Location
    Fort Worth
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    9,578
    What mpgs are you getting V? I logged mine this week and it showed 17.8 mpg city/hwy mixed...

    Moze, if I am getting damn near 18 mpgs in an ECSB with a 5.3L with a decent amount of mods and a tune that is out of whack, you should be getting close to 15 in a LQ9 RCSB...

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  2. #2
    Join Date
    Nov 2006
    Location
    Mesquite, TX
    Posts
    4,321
    well if i cruise 70-75 i get 16-16.5 anything above 80 and i get like 14-14.5
    2006 silverado SS....Clifford Jr...turbo coming soon
    1970 Chevelle ly6 swap....d1 coming soon

  3. #3
    Join Date
    Dec 2006
    Location
    Saginaw, Texas
    Posts
    607
    ok so any ideas as to why moze is getting such crappy gas milage? is it just the fuel eating 6.0 or what?
    I am gonna be a new Daddy...

    Drive it like you live hard and fast....
    '91 rcsb, 4.3 V6, 700R4 trans swap, 4/6 drop rolling on 18's, roll pan, 2" cowl hood, electric fan, TBI injector spacer, K&N filter replacement, flowmaster muffler...



    [Today 08:09 AM] ChevyLee: dale would make a awesome dad in law too

  4. #4
    Join Date
    Nov 2006
    Location
    Mesquite, TX
    Posts
    4,321
    he dont know how to add???
    2006 silverado SS....Clifford Jr...turbo coming soon
    1970 Chevelle ly6 swap....d1 coming soon

  5. #5
    Join Date
    Mar 2006
    Location
    Mesquite
    Posts
    8,176
    I'm doing very basic math...maybe I'm off (boy wouldn't I feel like a tool)...

    I believe it's a 20 gallon tank, and I get around 200 miles per tank.

  6. #6
    Join Date
    Nov 2006
    Location
    Mesquite, TX
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    4,321
    Quote Originally Posted by DamnYankee View Post
    I'm doing very basic math...maybe I'm off (boy wouldn't I feel like a tool)...

    I believe it's a 20 gallon tank, and I get around 200 miles per tank.
    you cant do it like that...fill up reset the trip drive it around then fill it back up...then you take whats on the trip...say 232 and it took 18 gallons to fill it then your gas mileage would be 12.88mpg...the only way you can do this is start with a full tank and end with a full tank
    2006 silverado SS....Clifford Jr...turbo coming soon
    1970 Chevelle ly6 swap....d1 coming soon

  7. #7
    Join Date
    Mar 2006
    Location
    Mesquite
    Posts
    8,176
    Yeah...just figured I was relatively close and it still seemed way lower than it should be - even with the margin of error.

  8. #8
    Join Date
    Dec 2006
    Location
    Saginaw, Texas
    Posts
    607
    man that thing is a gas hog... a lot has to do with how you drive it as well... but still i would think that you can get more than 200 miles to a tank...
    I am gonna be a new Daddy...

    Drive it like you live hard and fast....
    '91 rcsb, 4.3 V6, 700R4 trans swap, 4/6 drop rolling on 18's, roll pan, 2" cowl hood, electric fan, TBI injector spacer, K&N filter replacement, flowmaster muffler...



    [Today 08:09 AM] ChevyLee: dale would make a awesome dad in law too

  9. #9
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    I wonder if the tune goes into power enrichment mode too early. Now is that city driving or mixed city/highway or straight hwy?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  10. #10
    Join Date
    Mar 2006
    Location
    Mesquite
    Posts
    8,176
    Mixed...just my normal weekly useage...HOV lane to work, around town to get to the HOV...a few WOT runs here and there.

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