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Thread: great mileage

  1. #11
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    Keeping it under 2000 RPMS, I've been getting 19 in mine. Now normal driving, I get 16.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  2. #12
    Join Date
    Feb 2007
    Location
    Fort Worth
    Posts
    9,578
    Yeah, MPGs all depend on Cd, gearing, tire PSI, how good your tune is, and throttle input. In a stock height 2WD truck with a 5.3L, 4.10 gears, a good live tune, and keeping the truck around 60 mph, I can get just a touch over 21 MPGs.

    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

  3. #13
    Join Date
    Jun 2009
    Location
    Washington DC
    Posts
    1,812
    if I do mainly highway cruising I can get 21-22 mpg, but if its all city driving then only about 14-17. I have a heavy foot too, so I cant complain

  4. #14
    Quote Originally Posted by Maui4x4 View Post
    The money spent a tb spacer would be worthless unless it had a nitrous jet....

    You would be better off getting a port and polish job on your stock throttle body by someone who's reputable, better results per $. (would be around the price of a tb spacer)

    edit: dang im slow at posting, was none before i dropped this... lol
    how muuch u thinking for a port and polish job on stock throttle body
    2006 1500 crewcab
    5.3 flex fuel.
    mods include cst 4 inch spindle lift and 1 inch spacer up front.
    rancho adjustable shocks.
    performance mods: k&n CAI, Hyperpac programmer and flowmaster 70 series with 3" mandrel bent pipe.

  5. #15
    Join Date
    Mar 2007
    Location
    Austin,TX
    Posts
    479
    Quote Originally Posted by sleeper1500 View Post
    I've mustered up 28, shifting below 2000, keeping it around 60. K&N filter, Magnaflow muffler and tire pressure at 40. Next pay check is a tune for the little bugger and hopefully hit 30 mpg.
    I must admit I'm pretty skeptical about this. I've seen a lot of MPG threads and no one has ever come close to this. Then to say you did it without a tune makes me even more skeptical.

    How did you calculate it?

    I'm curious, as to mistakes are often make. Especially if you're converting KMPG to MPG

  6. #16
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    6,994
    4.3,5 speed, 3.23 gears, A/C off, highway driving. It's also a stripper truck, the only weight adding option is the A/C. I calculate it as KM/L x 2.82

    The 28 was a one time thing, perfect conditions driving a little better than reasonable, I average 26 and got as low as 19 at one point (cheap gas and a heavy foot)

    Since I can't afford to knock on 11's I get a little amusement out of trying to make it as efficient as I can, once I can hit 30mpg the V6's life in the truck is over.
    Last edited by Frenchy; 09-13-2009 at 05:20 PM.
    2006 Silverado
    Little Black Bitch

  7. #17
    Join Date
    May 2009
    Location
    Plainfield, IL
    Posts
    2,036
    right back wind, and TRYING to get good mileage...its def possible (but really boring)
    blown transmissions are about as useful as 97% of the guys on this forum

  8. #18
    Join Date
    Mar 2007
    Location
    Austin,TX
    Posts
    479
    Quote Originally Posted by sleeper1500 View Post
    4.3,5 speed, 3.23 gears, A/C off, highway driving. I calculate it as KM/L(2.82)

    The 28 was a one time thing, perfect conditions driving a little better than reasonable, I average 26 and got as low as 19 at one point (cheap gas and a heavy foot)

    Since I can't afford to knock on 11's I get a little amusement out of trying to make it as efficient as I can, once I can hit 30mpg the V6's life in the truck is over.
    Ah didn't realize it was a V6. That explains a few things.

    You know this is predominantly a performance site right?

    Just kidding with you man.

  9. #19
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    6,994
    Quote Originally Posted by randomhero View Post
    Ah didn't realize it was a V6. That explains a few things.

    You know this is predominantly a performance site right?

    Just kidding with you man.
    Haha yeah I'm well aware, but there is more to performance then going fast in a straight line.
    2006 Silverado
    Little Black Bitch

  10. #20
    ya and i love throwing this in the face of my friends, one has a dodge, gets 16 or 17 at best on highway, a new tundra, gets 16 on a really good day, a titan, which is about 17. i all told them and they are like are u serious dude, the dodge guy was at the chevy dealer that evening trying to negotiate a price
    2006 1500 crewcab
    5.3 flex fuel.
    mods include cst 4 inch spindle lift and 1 inch spacer up front.
    rancho adjustable shocks.
    performance mods: k&n CAI, Hyperpac programmer and flowmaster 70 series with 3" mandrel bent pipe.

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