Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Fuel Mileage...What have you done to improve it?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jeff427, Sep 10, 2001.

  1. Jeff427

    Jeff427 1/2 ton status

    Joined:
    May 22, 2000
    Posts:
    1,186
    Likes Received:
    0
    Location:
    Gladwin, MI
    Ok, instead of just listing how crappy your gas mileage in your Blazer (or truck) is, let's hear from everyone who has done something to improve their mileage, and how well their modification worked. Then we will have a list of things we can all try on our rigs to stretch our fuel dollars a bit [​IMG].


    Jeff427
    <a target="_blank" href=http://muddog.off-road.ws>Mud Dog Off Road Club</a>

    <a target="_blank" href=http://lyonsdesign.bizhosting.com>Lyons Design Web Site</a>
     
  2. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    The best way I found is to stay off the skinny pedal.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  3. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

    Joined:
    May 19, 1999
    Posts:
    21,623
    Likes Received:
    701
    Location:
    CO
    The best thing I have done to improve my gas milage is to jump in my wife's Honda and drive that, I go from around 10 to around 35.

    Steve

    Bandwidth FREE ZONE

    Mall-Running poseur 4x4 with curb-feelers
     
  4. DesertDueler

    DesertDueler 1/2 ton status

    Joined:
    May 23, 2001
    Posts:
    3,106
    Likes Received:
    0
    Location:
    Phoenix, AZ
    I drive my Jimmy to get better gas milage. My firebird gets 5 mpg. The Jimmy gets 12 mpg.

    86 Jimmy 4"lift 35"MTRs Other cars 69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  5. ftn96

    ftn96 1/2 ton status

    Joined:
    Sep 26, 2000
    Posts:
    3,238
    Likes Received:
    0
    Location:
    Nashville Tn
    Tune ups, a little extra tire pressure and coast on the hills as much as possible. I've tried drafting a bit but the damn thing is too high up and I keep getting the air foil from the drafted car hitting me right in the windshield.[​IMG]

    "you know... the guy with the BAD A$$ spring perches!!![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  6. rocko

    rocko 1/2 ton status

    Joined:
    Jul 3, 2000
    Posts:
    3,380
    Likes Received:
    0
    Location:
    Ellsworth, Maine
    K&amp;N airfilter, AcDelco Rapidfire plugs.. Havoline 10-40 engine oil.. (they claim it give's you more mileage) It does.. since I've been using it.
    New cap, rotor, plug wire's regularly.. And keeping tire's up to correct pressure work's..


    I haven't failed, I've found 10,000 ways that don't work. www.rocko.rockcrawler.com
     
  7. sapper

    sapper 1/2 ton status GMOTM Winner

    Joined:
    Jul 11, 2001
    Posts:
    3,052
    Likes Received:
    0
    Location:
    NoVa
    i got a increase of over 80 miles to the tank by changing the fuel filter.

    <a target="_blank" href=http://coloradoK5.com/gallery/Pauls89K5>http://coloradoK5.com/gallery/Pauls89K5</a>
     
  8. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    A couple of months ago I discovered that by slowing down about 20-25 km/h on the highway I could almost <font color=red>DOUBLE</font color=red> my mileage. I used to drive about 115 or 120 km/h(about 70-75 mph) on the highway. One day I drove through the National Park where the speed limit is 90 km/h(55 mph) and actually went at the posted speed. I got 780 kms out of that tank instead of the regular 450 kms!!!!!!!!!!!! I have a 305 and a 700r4.

    Needless to say, I now regularly drive between 90 and 100 km/h on the highway. Who cares how many guys pass me!!!!!!![​IMG]



    <font color=blue> MEAN DAD WITH TWO BAD KIDS<font color=blue>
     
  9. ironmikek5

    ironmikek5 1/2 ton status

    Joined:
    May 31, 2001
    Posts:
    145
    Likes Received:
    0
    Location:
    Massachusetts
    I tried everything, K&amp;N Air cleaner, high-perf ignition, more air in the tires, nothing worked. Then I started having my rig pulled by a team of Llamas...problem solved.

    The only thing is...that...SMELL...

    <font color=red>I will not tolerate intolerance </font color=red>[​IMG]
     
  10. TorkDSR

    TorkDSR 1/2 ton status

    Joined:
    Sep 1, 2001
    Posts:
    1,258
    Likes Received:
    0
    Location:
    bucks co pa
    i find that the 3:07 rears and the 38.5 groundhawgs work incredibly well at about 40. I also find that i get great mileage while winching, i never touch the gas!!!!!!! and while being trailered my rig does well.

    Who the hell drives these things for highway performance??? This is my HOBBIE, my LOVE, my PASSION, and if i only get 7.2 miles per gallon who cares???
    If i wanted efficeincy id drive an, dare i say it, import econobox piece of [censored]. that said, does anybody get worse than 7 highway??

    Tork DSR
    I just got a winch, it takes the fun out of things.
     
  11. blazer72

    blazer72 1/2 ton status

    Joined:
    Apr 13, 2000
    Posts:
    939
    Likes Received:
    0
    Location:
    KCMO
    I started towing my K5 thats helps a bunch,
     
  12. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    I get good milage. I'm running a TBI 350, 700r4, 3.73 gear ratio, K&amp;N, MSD, Edelbrock headers, Flowmaster, no cat.
    When I'm running my 31" tires at 65 mph i get 19-20 mpg on 89+ octaine gas. I loose about 1-2 mpg when I switch to my 33"MT tires in the winter. Also when I an doing a lot of freeway driving i keep the air pressure up near the max 45 to 50 psi to decrease the rolling resistance. That helps to get a little better milage.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze>http://coloradok5.com/gallery/Thunders-Blaze</a>
    <font color=orange>Charter Member of The Too Much Fun Club</font color=orange>
     
  13. Kyle89K5

    Kyle89K5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    2,273
    Likes Received:
    0
    Location:
    OKLAHOMA
    on the same page as Canmore, I slowed down about 10 MPH. Neveer get the rpms over about 2200 or so. This went a LONG ways. It's kinda hard now, I've got 4.10's, 36's, and a 700R4. I don't get to use overdrive unless I'm driving 65 to start with.

    A good tuneup is the only thing I've found that keeps my miliage worth a damn. I saw a 2 mpg jump just by replacing my O2 sensor and EGR Valve. Plugs, wires, and all that other misc. crap doesn't hurt none

    Kyle
    89K5
     
  14. Pugsley

    Pugsley 1/2 ton status

    Joined:
    Jan 16, 2001
    Posts:
    3,556
    Likes Received:
    0
    Location:
    Tucson, Arizona
    I also did the slow-it-down trick, with awesome results. By running at 55 between Kingman and Phoenix, instead of the usual 70-75, I got 19 mpg average compared to 14. Everybody and their brother passes me, but I don't care - I like not having to make extra fuel stops[​IMG]

    Clean up on aisle 3!!
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  15. Jeff427

    Jeff427 1/2 ton status

    Joined:
    May 22, 2000
    Posts:
    1,186
    Likes Received:
    0
    Location:
    Gladwin, MI
    <blockquote><font class="small">In reply to:</font><hr>

    Who the hell drives these things for highway performance??? This is my HOBBIE, my LOVE, my PASSION, and if i only get 7.2 miles per gallon who cares???
    If i wanted efficeincy id drive an, dare i say it, import econobox piece of [censored]. that said, does anybody get worse than 7 highway??


    <hr></blockquote>

    That is fine if you are satisfied with that. But some of us use our rigs as daily drivers, so there is nothing wrong with getting the most out of them that we can. I especially like to go run trails for as long as I can before having to head back to "civilization" to fill up again. I am not looking to get 30 MPG out of my Blazer (although it would be nice), I just want optimum performance, which for my application also means optimum efficiency for what it is.

    Oh yeah, when I first got my 77 (350 [stock], 3 speed, 205, 3.73's) it got 8.5 mpg.

    Jeff427
    <a target="_blank" href=http://muddog.off-road.ws>Mud Dog Off Road Club</a>

    <a target="_blank" href=http://lyonsdesign.bizhosting.com>Lyons Design Web Site</a>
     
  16. Alaskan85K5

    Alaskan85K5 Registered Member

    Joined:
    Sep 5, 2001
    Posts:
    32
    Likes Received:
    0
    Location:
    Anchorage, AK
    Well I'm trying to get the best fuel mileage possible as well. I haven't had much luck though. My 85, 305, 31" get 8mpg in town and 10mpg highway. I've changed plugs, cap, rotor, plug wires, air filter, fuel filter, pvc valve, checked the timing. Needless to say I'm gettting the same mileage as I was before.

    Next thing on my list is getting my Carb checked out. To be honest I truly believe all the damn emissions crap is causing alot of this. I had a 73 chevy with a 350 in it and got 15mpg highway. Main difference was I had no emissions equipment on the thing.

    I also have a TH350 tranny, might get a bit better if I were running a TH700r4 but I don't really have the money to change it out.

    Remove the NOSPAM from the e-mail address to send me an e-mail.
     
  17. Pugsley

    Pugsley 1/2 ton status

    Joined:
    Jan 16, 2001
    Posts:
    3,556
    Likes Received:
    0
    Location:
    Tucson, Arizona
    Good point on the emissions stuff - My non smogged 350 will actually get within 1 mpg of my mom's TBI 305 in her Caprice on a road trip.

    Clean up on aisle 3!!
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  18. ChevyCaGal

    ChevyCaGal 3/4 ton status

    Joined:
    Dec 16, 2000
    Posts:
    8,158
    Likes Received:
    0
    Location:
    Sacramento, CA USA
    I replaced my exhaust... Edelbrock headers, high flow cat, and a flowmaster muffler... K&amp;N filter, new spark plugs, wires, trying this thing called a tornado and fuel magnet, new dist cap and rotor, tuned up my carb, keep my tires filled the right psi, driving slower helps more then you could dream... I'm getting better gears soon and will have manual hubs... not sure if the hub thing will help (some people say yes some say no) but the gears will... plus I got OD... so once I get done I should be doing well!.... oh yeah i got a tbi set up to someday install so whoohoo!! [​IMG]

    How can I miss you if you won't go away? [​IMG]
    <a target="_blank" href=http://www.chevycagal.homestead.com/steph.html>www.chevycagal.homestead.com/steph.html</a>
    &lt;&gt;&lt; 1 Timothy 4:12 &gt;&lt;&gt;
     
  19. Blue85

    Blue85 Troll Premium Member

    Joined:
    Jul 26, 2000
    Posts:
    9,084
    Likes Received:
    486
    Location:
    Grand Rapids area
    Along the same lines as driving slower, a MPG gauge in the vehicle can really help you drive differently and get more for the gallon. I am not sure how well the ones work for carb trucks, though. I have one in my GTP and by keeping my eye on that economy, I find myself slowing down and easing the throttle trying to get that number up instead of always putting my foot in the blower and making as good of time as possible.

    Does anyone have before and after fuel injection numbers to share? I am starting to think that it is a poor financial decision NOT to do an TBI or TPI swap.

    <font color=green>"It is generally not adviseable to eject directly over the area you just bombed"</font color=green>
     
  20. Mudzer

    Mudzer 1/2 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    3,639
    Likes Received:
    0
    Location:
    Missouri
    Jeff,

    lets see... I installed 37" Boggers which are taller and help me go faster! (yeah right) I installed more lift to get the air to go over and under my Blazer, therefore providing more aerodynamics! (yeah right) and I have started caving in the bedsides from wheeling tight trails, this made the vehicle smaller and therefore more fuel efficient!

    Ok, on a serious note, I would say lighten up your rig as much as you can. When installing a motor, build one as stock as can be with fuel injection, this will keep you dependable and by being stock should get better mileage than a 502 crate motor (right Ken?). Keep your foot off the floorboard! Hey man, thanks alot for the decals, they looked killer, even with sheetmetal damage!

    Mudzer 1978/91 K5
    <font color=blue><a target="_blank" href=http://www.mudzer.rockcrawler.com>www.mudzer.rockcrawler.com</a></font color=blue>
     

Share This Page