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  1. #11

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    with my 02 silverado 2 wheel drive. 5.3L, 3.43 rear end. stock except a jet power programmer and k&n filter. I used to get 24-26mpg on the highway doing 72mph with the AC on. If I sped up to 80-85mph it would drop to about 20mpg. This was all hand calculations as the truck did not have a DIC with avg mpg readout
    Last edited by Pikey; 09-14-2012 at 09:12 AM.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  2. #12
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,612

    Default

    17-18 mpg at an honest 80 mph- is GREAT!
    25 mpg at 80 mph- is the best SBC numbers at 80 mph that I've ever heard of.
    What is you actual "tank" mpg 4.8 vs 5.3 ?
    Not what the NAV system tells you- but actual calculated mpg-distance traveled from trip meter divided by gallons pumped in.
    I don't have a 5.3 or 4.8- but I'm a mpg NUT.
    And in general the 5.3(same year motor vs same year motor) gives the same mpg as the 4.8-the same or so close as to not matter.
    Now GM did improve the mpg every few years-so maybe the 2007 4.8 had a slight mpg over the 2004 5.3- but I wouldn't guess it to be 7 mpg better-maybe 2-3 at best.

    I would check actual mpg-manually calculating it for several tanks. If you get 15 mpg in mixed driving-you are doing OK.
    Did you ever actually measure the mpg on the 4.8-not NAV numbers-actually hand calculate it?
    Don't trust the NAV numbers
    In any case 17 mpg at 80 mph-awfully good! 25 mpg at 80 mph-I wouldn't trust the NAV if it told me that.
    Charlie
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  3. #13

    Default

    Quote Originally Posted by Pikey View Post
    with my 02 silverado 2 wheel drive. 5.3L, 3.43 rear end. stock except a jet power programmer and k&n filter. I used to get 24-26mpg on the highway doing 72mph with the AC on. If I sped up to 80-85mph it would drop to about 20mpg. This was all hand calculations as the truck did not have a DIC with avg mpg readout
    That's crazy mpg...

  4. #14

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    Quote Originally Posted by SurrealOne View Post
    That's crazy mpg...
    The first time I figured it out I was shocked. So, I did it with every highway road trip for 6 months and came up with the same answer give or take 1mpg. The kid that bought the truck from me called me about a month after I sold it. He said "I had to call, I thought you were BSing me about the mpg, you were right, and if I drive slower I can get it even higher". To bad that truck was not big enough for the growing family.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  5. #15

    Default

    2WD truck, I presume...

  6. #16

    Default

    yes, 2 wheel drive

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  7. #17

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    What do you mean by rate? I'm going in as an E1. Doing aviation electronics.
    Quote Originally Posted by 2k8z71 View Post
    Chad: what rate did you get in the Navy? I was in the Navy myself. Also, I used to get 22-23mpg driving from Bakersfield Ca to Los Angeles, then I leveled my truck and bigger rims/tires and now i get 19 if I do it right lol. All I have is an intake (the mileage was done via the good ole math method instead of DIC)
    '07 Chevy Silverado Classic

    PERFORMANCE
    -K&N Intake
    -Air Raid Throttle Body Spacer
    -Thrush Muffler
    -Bully Dog Triple GT Programmer
    5.3L V8
    LOOKS
    -3" Spindle Lift
    -Tint
    -Blacked Out Rims
    -Blacked Out Taillights
    SOUND
    -2 Kicker CVT 12s
    -Rockford Fosgate 6.5"
    -500 Alpine Mono Block
    -Pioneer 6.5" Touch Screen
    -2 Boss Tweeters
    SOON!
    -3.73 gears

  8. #18

    Default

    Quote Originally Posted by Chad513 View Post
    What do you mean by rate? I'm going in as an E1. Doing aviation electronics.
    E1 = Rank Ranks are as follows - E-1/E-9 Enlisted O-1/O-10 Officer OE-1/OE-4 Officer former Enlisted CWO-1/CWO-4 (5 for Army) Chief Warrant Officer

    Aviation Electronics = Rating
    Are you going as an AE = Aviation Electrician
    Or an AT = Avionics Technician
    Big difference between the two skills although they work side by side and in the same shop most times.
    Before the end of boot camp you'll be expected to know the difference between Navy rating and Navy rank, the different insignias for each each rate, the basic job each rate does, and the different ranks.

    Another member on the site Rileyjr16 will be leaving for Navy boot camp in a few days.

    I retired USN with 25 yrs active duty, in as an E-1 out as a CWO4, held every enlisted rank from E-1 to E-9 (a couple I had the distinction of holding more than once unfortunately) before going CWO. Enjoy it's a great job and you'll learn and see more in any one year on active duty than you would in 5 years of civilian life.

  9. #19

    Default

    I'm on Airman Pact but I'm gonna push for AWS (Helicopter Aircewman). I'm leaving Tuesday for the hotel and going to MEPS and airport Wednesday and get there early Thursday AM I think. If I like it I'll put in 20 years worth.



    If at first you don't succeed, chances are, you are using too small of a cheater bar

    Current:
    1999 GMC Sierra SLT Z71 | 5.3 Vortec | Spectre Cold Air Intake | TransDapt TBS | Hypertech 30005 Tune | 2005 Chevy Tails | Denali headlights | AWS Bug Shield | 265/75/16 Mastercraft Courser A/T | "Ghetto" painted tailgate | Boss HD Speakers | 2005 Overhead Console | Dual Thrush Turbo Mufflers
    Future:
    Bigger Amp Alternator | Electric Fans | Oil/Trans Fluid cooler | Re-done exhaust | Paint | Interior Restoration/upgrade with newer model stuff | Window Visors (In channel) | Tint | Low-Profile Tool Box | LEDs throughout stock cab locations | And whatever is spurr of the moment
    US Navy Sailor :sign0011:

  10. #20

    Default

    Quote Originally Posted by tbplus10 View Post
    E1 = Rank Ranks are as follows - E-1/E-9 Enlisted O-1/O-10 Officer OE-1/OE-4 Officer former Enlisted CWO-1/CWO-4 (5 for Army) Chief Warrant Officer

    Aviation Electronics = Rating
    Are you going as an AE = Aviation Electrician
    Or an AT = Avionics Technician
    Big difference between the two skills although they work side by side and in the same shop most times.
    Before the end of boot camp you'll be expected to know the difference between Navy rating and Navy rank, the different insignias for each each rate, the basic job each rate does, and the different ranks.

    Another member on the site Rileyjr16 will be leaving for Navy boot camp in a few days.

    I retired USN with 25 yrs active duty, in as an E-1 out as a CWO4, held every enlisted rank from E-1 to E-9 (a couple I had the distinction of holding more than once unfortunately) before going CWO. Enjoy it's a great job and you'll learn and see more in any one year on active duty than you would in 5 years of civilian life.
    Yeah I'm going in as an AV. I was trying to get IT but I have a kind of large record so I couldn't get it and he said if you like computers then this would be pretty close experience so I was like lets do it. Well thanks for the info. I'm a little nervous on what I have to know, there is a lot. haha
    '07 Chevy Silverado Classic

    PERFORMANCE
    -K&N Intake
    -Air Raid Throttle Body Spacer
    -Thrush Muffler
    -Bully Dog Triple GT Programmer
    5.3L V8
    LOOKS
    -3" Spindle Lift
    -Tint
    -Blacked Out Rims
    -Blacked Out Taillights
    SOUND
    -2 Kicker CVT 12s
    -Rockford Fosgate 6.5"
    -500 Alpine Mono Block
    -Pioneer 6.5" Touch Screen
    -2 Boss Tweeters
    SOON!
    -3.73 gears

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