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My gas milage sucks now, can't figure out why, HELP!

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  • My gas milage sucks now, can't figure out why, HELP!

    When I bought my car in December 99' it got about 350-400 miles per tank(400/15.5gal=25mpg). I drove rather conservative then ;) . And I once made it to Atlanta from Tampa on one tank of gas in June 200. But now it is more like 230-250 miles per tank, roughly 15mpg :( . That's more like V-8 mileage. I do drive very fast now, full throttle almost every gear of every stoplight, of every day. But I tried to drive "normal" last week to test out my theory. Well it didn't help one bit . Still about 235 miles to a tank.

    There's only one thing I can think of. Engine ware. When I had my new clutch installed 6 weeks ago, my engine oil was 2 quarts [img]graemlins/omg.gif[/img] low. All the engine seals are good, no leaks. So the piston seals must be worn because the engine had 52,000 miles in Dec 99, and now it has 97,000m. This is the only thing I can think of. If anyone can think of another reason or cause, please let me know. If it is the pistons, can new rings be installed or does the cylinder bores need to be machined?
    Moroso CAI<br />Flowmaster 40 Delta

  • #2
    "I do drive very fast now, full throttle almost every gear of every stoplight, of every day"

    Reminds me of something a wise man once said

    " It is more fun to drive a slow car fast then a fast car slow "


    but man I don't even ride rentals that car....
    RedLineVSix <br />95 Patriot Red Trans Am, M6, 3.42\'s,no rear tires<br />(SOLD!)97 Silver Camaro 3.8 Liter A4 3.42 + LSD, 1pc DS, and one messed up speedo :)

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    • #3
      just coast more (ie hammer it up to like 10 over and then coast for a while) , i was gettin about ~250 (10% gear off) and now its up to like 300, 315, but i also switched to 93, i dont know if that is it, but o well
      98 Jeep Grand Cherokee 5.9 Limited<br /><br /><br />MODS:<br />180* t-stat, K&N FIPK, mopar ECU,<br />mike leach long tube headers+3\" y-pipe, 3\" all the way out flowmaster 50 series, mopar magnum 2bbl m1 intake manifold, APS 52mm throttle body, powerslots, 2 JL 10w3\'s

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      • #4
        O2 sensors!!! These are usually the culprit in my car when my gas mileage dips. I'm going to change mine soon. I've been changing them out about once a year for preventative maintenance.
        95 Camaro 3.4L A4<br />Bosch plugs/MSD wires, K&N FIPK , Magnaflow catback, hi-flo cat, B&M Shift+, Dee\'s spacer<br />Kenwood KDX-859, eXcelon Amps, Infinity Kappa 3-way doors and Perfect10 sub<br /><a href=\"http://www.cardomain.com/id/harbins95\" target=\"_blank\">Behold, the raw fury that is known as the 3.4!!!</a>

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