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how can i get better gas mileage with vortec 350

This is a discussion on how can i get better gas mileage with vortec 350 within the Technical / Maintenance forums, part of the General Discussion category; if theres any way to improve mpg on the 350 vortec motors i would love to know. my truck is ...

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    how can i get better gas mileage with vortec 350


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    if theres any way to improve mpg on the 350 vortec motors i would love to know. my truck is stock with 373 gears and its a z71. only thing done to it is a k&n filter not a cold air just the filter. thanks guys

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    Registered User crossy's son's Avatar
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    Re: how can i get better gas mileage with vortec 350

    What are you getting now?

    It's not gonna get better than 15 highway....so just ease up on the skinny pedal.

    But headers and a full exhaust would make a difference around town because you wouldn't have to give it as much gas to get it up to speed
    91 Dodge 4x4 12v Cummins Intercooled/5 speed, D60 & D70 rear w/ 3.55's and a Powr-Lok--- Lots of fuel and some boost-

    SOLD-- 91 Reg. cab shortbed GMC, Black on black, 350tbi crate, 5 speed w/hurst shifter, 3.42 G80--- Over 400,000 miles on body

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    Re: how can i get better gas mileage with vortec 350

    Complete tune up, mild tread high quality tires like Michelin.

    Black Bear custom tune.

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    Registered User crossy's son's Avatar
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    Re: how can i get better gas mileage with vortec 350

    Yea i was gonna say something about tires too. The narrower the better and less aggressive the better.

    My dad used to run 235/85/16 on a 92 Z71 he had with a 350tbi and it consistenly got 1-1.5 mpg better mixed driving then it did with 265/75's A/T's
    91 Dodge 4x4 12v Cummins Intercooled/5 speed, D60 & D70 rear w/ 3.55's and a Powr-Lok--- Lots of fuel and some boost-

    SOLD-- 91 Reg. cab shortbed GMC, Black on black, 350tbi crate, 5 speed w/hurst shifter, 3.42 G80--- Over 400,000 miles on body

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    Re: how can i get better gas mileage with vortec 350

    235/85 tires rule, but picking is slim.

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    Registered User crossy's son's Avatar
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    Re: how can i get better gas mileage with vortec 350

    Yea they're turning up though lately for some reason 235's are all over my craigslist but 265's or 285's are impossible to find,


    I think everyone in Maine knows Narrow tires are beasts in snow so they get sucked up
    91 Dodge 4x4 12v Cummins Intercooled/5 speed, D60 & D70 rear w/ 3.55's and a Powr-Lok--- Lots of fuel and some boost-

    SOLD-- 91 Reg. cab shortbed GMC, Black on black, 350tbi crate, 5 speed w/hurst shifter, 3.42 G80--- Over 400,000 miles on body

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    Re: how can i get better gas mileage with vortec 350

    trade in for a new 1500 with energy management system, son has one great power and good mileage.

    for old tech 350
    tuneup with all ac delco parts
    change all fluids (motor, trans and differential) to synthetic oils
    run tires a high end of tire pressure rating

    run non ethanol fuel if you can find it, otherwise try different brand fuels, see if you find one that gives you a little advantage.

    speed it a killer in these heavy vehicles, slow starts, clean tool box of all dead weight,
    check brakes be sure you do not have any dragging brakes.

    about all you can do other than high dollar processor kits.

    it takes fuel to move heavy iron.

    buddy has a new camero, 400hp and still gets around 23 mpg. goes like wild dog
    new technology.

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    Re: how can i get better gas mileage with vortec 350

    thanks guys

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    Re: how can i get better gas mileage with vortec 350

    Good:
    K&N and take your time getting up to speed + good tire pressure regardless of the tire

    Bad:
    Tornado
    + I bought a hypertec programmer and tried the "efficiency" setting.. my fuel economy dropped 15%

    Good Luck!

  10. #10
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    Re: how can i get better gas mileage with vortec 350

    Good:
    K&N and take your time getting up to speed + good tire pressure regardless of the tire

    Bad:
    Tornado
    + I bought a hypertec programmer and tried the "efficiency" setting.. my fuel economy dropped 15%

    Good Luck!

 

 

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