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Avg mileage you changed out your plugs and wire?

This is a discussion on Avg mileage you changed out your plugs and wire? within the External Engine forums, part of the LSx Technical Help Section category; what is the avg mileage everyone swaps out their stockies and go with something else or just something new?...

  1. #1
    sell out Mustang Killa's Avatar
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    Avg mileage you changed out your plugs and wire?

    what is the avg mileage everyone swaps out their stockies and go with something else or just something new?

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    M6 King Hot Black Trans-Am's Avatar
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    2001 Trans-Am 13 F-XT

    Why would you want to change them? J/K


    I'm going to do mine when I get to the headers next spring and do trans & motor mounts too. I'll yank the air pump and other crap all at the same time too. I hate taking things apart more often than needed.

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    Junior Member A BAD T/A's Avatar
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    I changed the plugs around 75K 'cause I thought I should. Plugs looked great! Only reason I put in new ones is I had already purchased them!
    No reason to change wires.

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    I'm coming up on 77k and am going to change them within the next few weeks. Car seems to be running well, I got just hair over 24mpg my last tank, but it has a shake at idle, so I'm wondering if plugs will cure it.

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    sell out Mustang Killa's Avatar
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    How do you get 24 mpg with an a4 I can't break 19!

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    Slow'er'Ass Mr. Luos's Avatar
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    I change the plugs once a year.
    2500-3000 miles.

    Wires are MSD. Should be good for quite some time.

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    sell out Mustang Killa's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    I change the plugs once a year.
    2500-3000 miles.

    Wires are MSD. Should be good for quite some time.
    . Are you laughing because you are joking or because they waited so long to change theirs? What kinda plugs do you use?

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    My Neighbors Hate Me!!! lvbroham1's Avatar
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    I think he changes his plugs so often because they are not the stockers. Aftermarket plugs give you great performance, but have to be changed more often. The stock ones are made to last for a long time. I change my NGK's every 3,000 miles. Plus by no means is my valvetrain stock. But since I barely drive mine, that's about once a year for me. LOL!!!

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Mustang Killa View Post
    . Are you laughing because you are joking or because they waited so long to change theirs? What kinda plugs do you use?
    I was laughing because of how short the time frame is.
    I run NGK TR55's at .048"

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    Junior Member A BAD T/A's Avatar
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    I was driving 60 mi / day round trip on I 15 avg 70-75 MPH and got 20 mpg on a good day.
    Moved to MO and drive 60 mi /day round trip, avg 55 mph and never get less than 22 mpg. Noticed an immediate increase in milage getting out of CA.
    Out on the road, avg 70 mph, NOW, I get 25 - 26 mpg!
    All this w/A4 AND 3.23 gears!
    I do use cruise nearly all the time, even @ 55!
    go figure.
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    A4 w/3.23s. 245-50x16 Kuhmo M550AS. MTI w/K&N & FRA, Hooker 'Cat-back', BMR LCAs. 1LE sway bar, urathane bushings, Bilstein HDs f&r. Granatelli SFCs, KVR cross-drilled front rotors with PBR "Metal Master" pads.

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    Quote Originally Posted by Mustang Killa View Post
    How do you get 24 mpg with an a4 I can't break 19!
    All stock, 2,73's, and I drive like a grandma. Cruise set at 65, and I do mostly highway driving. I put on about 350 miles a week, work is 30 miles away from where I live, so I try to drive conservatively to cut my fuel bill down.

    I get on it once in a while, but no racing and no holeshots.

  12. #12
    cutting and welding mark21742's Avatar
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    Quote Originally Posted by Mustang Killa View Post
    How do you get 24 mpg with an a4 I can't break 19!
    24-26 mpg in my 04 a4 goat, autolite 103's, lt's, 3" true duals, slp maf, p&p tb, and a home made cai/ram air

  13. #13
    cutting and welding mark21742's Avatar
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    I run mobil 1, I change my filter every 2,500 miles and top off the oil, every 5,000 I do a full oil change, every 10,000 I change the plugs. AP 103 plugs

  14. #14
    The Demon Demon_Z28's Avatar
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    I did plug and wires at 95k, amazing huh, sparking still @ 95k lol but I now have MSD wires and E3 spark plugs

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    Member Ripper415's Avatar
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    tons of people run tr-55s and this is the first i've heard about someone needing to change them every 3k miles. most people put em on and leave em on forever w/o probs.

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    Quote Originally Posted by Ripper415 View Post
    tons of people run tr-55s and this is the first i've heard about someone needing to change them every 3k miles. most people put em on and leave em on forever w/o probs.
    i think he just does it for fun..lol

  17. #17
    Member BlackSS1's Avatar
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    Quote Originally Posted by Demon_Z28 View Post
    I did plug and wires at 95k, amazing huh, sparking still @ 95k lol but I now have MSD wires and E3 spark plugs
    91K. the oldies still worked great, just did plugs/wires during header install because it was an easy opportunity to get 'er done.

  18. #18
    member since may 2000 nhraformula's Avatar
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    mpg didnt improve at all with a plug and wire change.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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