Opinion - Spark plugs for '98 3.0 Voyager

Discussion in 'Voyager' started by Ken Peterson, Mar 12, 2005.

  1. Ken Peterson

    Ken Peterson Guest

    Some time this spring I'd like to pop some new spark plugs in my
    wife's '98 3.0 V6 Voyager (Vger). This one has the Mitsubishi engine.

    When I got the car two years back, it had 66K miles on it and when I
    replaced the plugs, they looked like the originals, they were that
    bad. (Never have I seen such bady worn plugs!) I replaced those plugs
    with Bosch Platinum plugs (regular plats, not the 2s or the 4s) The
    Vger now has about 75K on the clock.

    From personal experience in other cars and also from reading on the
    'net, the original Bosch Platinums may not be the best plugs when one
    is looking for a long-lasting plug.

    What do people recommend? The Bosch Platinum+4s? Bosch Platinum 2s?
    Autolite Platinums? Denso Iridiums?

    I don't mind spending more if the plugs are long-lasting premium
    plugs. The Vger is only driven about 4K a year around town, so these
    very well may be the last plugs I put in the car.
     
    Ken Peterson, Mar 12, 2005
    #1
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  2. Ken Peterson

    Bob Shuman Guest

    I know that the original equipment on my 1991 Mitsubishi 3.0L were NGK plugs
    which were rated for 60K miles. I've had very good luck with the NGK plugs,
    but they are a bit expensive. Even so, shop around for them since price
    varied considerably.

    Bob
     
    Bob Shuman, Mar 12, 2005
    #2
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  3. NGK. Regulars are fine, Iridiums are VERY long lasting and commensurately
    expensive.
    Neither are their latest scams, the Platinum+4 and Platinum+2.
     
    Daniel J. Stern, Mar 12, 2005
    #3
  4. Ken Peterson

    Ken Peterson Guest

    On Sat, 12 Mar 2005 12:45:50 -0500, "Daniel J. Stern"

    Thanks for the advice. I see that NGK has a variety of plugs for this
    engine:

    Standard $2.25
    V-Power $2.50
    G-Power Platinum $3
    Iridium IX $7
    Laser Platinum $12

    Any opinion on Autolite double-platinums? I like the idea of a
    plat-to-plat airgap and the autolites are half the price of the NGK
    laser plats.
     
    Ken Peterson, Mar 13, 2005
    #4
  5. Ken Peterson

    Richard Guest

    Autolite double-platinum's are a superb plug. I have had great experience
    with them in two Chrysler Town & Countries and a PT Cruiser (for which they
    are OEM approved) and a 98 RAV4.

    Richard.
     
    Richard, Mar 13, 2005
    #5
  6. Certainly not a bad plug. I ran Autolites exclusively until I mostly
    changed to NGKs, but I'm still happy to run Autolites. I will not run
    Champions or Bosches (too many problems!).
     
    Daniel J. Stern, Mar 13, 2005
    #6
  7. Ken Peterson

    Ken Peterson Guest

    On Sat, 12 Mar 2005 20:55:44 -0500, "Daniel J. Stern"

    Thank you Richard & Daniel for your inputs!

    Looks like I'll have to order the plugs via the 'net as those do not
    appear to be available in Long Island, NY, unless some performance
    shop carries them.

    I figure the Autolite double-plats should do nicely and might last a
    few years (considering the 4-5K a year that's put on the clock).

    The Iridium plugs only have an iridium core, not the ground electode,
    so while the iridium center electrode may last a lifetime, not the
    ground, so no good for that.

    I haven't run Champions in years. Never really liked them, except I
    did use them back in the early 70's on a '64 Buick Skylark 300 cu in
    V8 I had.

    A tip of the hat, gents!
     
    Ken Peterson, Mar 13, 2005
    #7
  8. Ken Peterson

    HarryS Guest

    I buy the OEM Champion the cheapest plugs for all my vehicles and change
    them out at each 30K. The truth to be known there is no proof that a more
    expensive plug provides better performance whether it be a platinum , or
    split fire, or any other type. See for yourself write each manufacturer and
    ask them to provide a guarantee and if you are lucky to get an answer you
    will find they will not provide one and they will provide many excuses.

    --
    HarryS My 2¢
    | On Sat, 12 Mar 2005 20:55:44 -0500, "Daniel J. Stern"
    |
    | Thank you Richard & Daniel for your inputs!
    |
    | Looks like I'll have to order the plugs via the 'net as those do not
    | appear to be available in Long Island, NY, unless some performance
    | shop carries them.
    |
    | I figure the Autolite double-plats should do nicely and might last a
    | few years (considering the 4-5K a year that's put on the clock).
    |
    | The Iridium plugs only have an iridium core, not the ground electode,
    | so while the iridium center electrode may last a lifetime, not the
    | ground, so no good for that.
    |
    | I haven't run Champions in years. Never really liked them, except I
    | did use them back in the early 70's on a '64 Buick Skylark 300 cu in
    | V8 I had.
    |
    | A tip of the hat, gents!
    |
    | >On Sat, 12 Mar 2005, Ken Peterson wrote:
    | >
    | >> Thanks for the advice. I see that NGK has a variety of plugs for this
    | >> engine:
    | >>
    | >> Standard $2.25
    | >> V-Power $2.50
    | >> G-Power Platinum $3
    | >> Iridium IX $7
    | >> Laser Platinum $12
    | >>
    | >> Any opinion on Autolite double-platinums?
    | >
    | >Certainly not a bad plug. I ran Autolites exclusively until I mostly
    | >changed to NGKs, but I'm still happy to run Autolites. I will not run
    | >Champions or Bosches (too many problems!).
    |
    | On Sun, 13 Mar 2005 01:30:05 GMT, "Richard" <>
    | wrote:
    |
    | > Autolite double-platinum's are a superb plug. I have had great
    experience
    | >with them in two Chrysler Town & Countries and a PT Cruiser (for which
    they
    | >are OEM approved) and a 98 RAV4.
    | >
    | >Richard.
     
    HarryS, Mar 13, 2005
    #8
  9. Ken Peterson

    jdoe Guest

    Put in what it came with in the first place. The mits is hard on plugs
    it's
    a known fact. Either way the mfgr. spends WAY more time and money than we
    do
    to figure out what will give the best balance of performance. Bosch plats
    are all junk imo. anyway.
    Larry
     
    jdoe, Mar 13, 2005
    #9
  10. The Mitsubishi engine is not "hard on plugs" anywhere except in your
    imaginative little mind.
    The manufacturer spends time and money negotiating for the lowest-priced
    plug that will do the job acceptably.
    Well, there y'go -- you got one out of three statements correct in your
    post.

    Better luck next time.
     
    Daniel J. Stern, Mar 13, 2005
    #10
  11. Nobody said it did.

    There are more expensive plugs that make engines run worse and don't last
    very long (Splitfire, Bosch Platinum, etc.), but there are also more
    expensive plugs that make the engine run properly over a longer period of
    time.

    Go back to sleep, now.
     
    Daniel J. Stern, Mar 13, 2005
    #11
  12. Ken Peterson

    Bob Shuman Guest

    Ken,

    My 3.0L is a different application even though it is the same engine. My
    3.0L is in a 1991 Mitsubishi 3000GT SL. This is the double overhead cam
    version with 222 base HP and basically the same engine (and plugs) as is
    used in the much higher HP twin turbo. The 3000GT calls for the laser
    platinum version. As I indicated in my previous post, they are 60K mile
    plugs and I picked them up the last time for around $10-11 each somewhere on
    the web. This compares to the $23 each they wanted at the local Chrysler
    (Stealth) and Mitsubishi dealers.

    They are excellent plugs and perform very well. I was reluctant to try
    anything else since I have had some bad luck when not using OEM plugs in the
    past. Hey, if the manufacturer sprang for the extra bucks for these plugs
    in the first place, then there was a reason. That all said, I'm not sure
    what plug your make and model call for so check to see what it came with
    from the factory and use the same if possible.

    Bob
     
    Bob Shuman, Mar 13, 2005
    #12
  13. Ken Peterson

    Guest Guest


    Double platinums are genreally designed for lost spark ignitions,
    because half the plugs fire positive, and the other half negative.
    They are not a great improvement on conventional ignitions, and using
    non platinum plugs on my old 3.0 Aeostar (ford) I got over 40,000KM on
    a set. Never liked leaving them in much longer than that anyways, as
    they tended to "burn" the case, and you'd twist them off trying to
    remove them. Not nice on an engine where you have to do everything by
    "braille".
     
    Guest, Mar 13, 2005
    #13
  14. Ken Peterson

    jdoe Guest

    Some day your head will come out of that dark place
     
    jdoe, Mar 13, 2005
    #14
  15. Ken Peterson

    me! Guest

    Amen on that one Daniel.. Champion cranked out so much crap in the 60's
    (sparkplugs anyway.. don't remember them marketing anything else)that I
    still won't buy *anything* that says Champion on it. Autolites.... yup..
    used them for years NGK's have used also without *any* comebacks or problems
    of any kind.
     
    me!, Mar 14, 2005
    #15
  16. Ken Peterson

    me! Guest

    Bosch platinums.. tried the 2 prongs.. 1. they gave a guarantee if I
    couldn't tell the difference I could get my money back.. (of course I DID)
    2. plugs on my 2.4 are a 30 minute job from opening the hood to closing
    after the finish or I wouldn't have bothered.. but it did do well to settle
    the argument for me anyway..

    Platinum=another attempted rip off *no value* didn't make a bit of
    difference to the positive.. and I actually felt the vehicle did not start
    as well.. however that was not scientific.. just a judgment of my own.. ..
    but one of experience.. I have had the vehicle for 7 years and put 100,000
    miles on it in the city (Chicago) not a lot of high way or expressway
    miles.. hence many many many starts.
     
    me!, Mar 14, 2005
    #16
  17. Ken Peterson

    Ken Peterson Guest

    Thanks for all the input - I ordered some Autolite double platinums
    today from http://www.sparkplugs.com - I figure that will be better
    than the Bosch Platinums that are currently in use. The Bosch plugs
    have less than 10K on them by the time I remove them, so I figure
    they'll do until their replaced.

    On a side issue, I am impressed with the Bosch 8mm plug wires. They
    seem to be of good quality, plus I've found Bosch wiper blades to be
    better than Anco. (IMHO)
     
    Ken Peterson, Mar 14, 2005
    #17
  18. Ken Peterson

    Richard Guest

    On a side issue, I am impressed with the Bosch 8mm plug wires. They seem
    to be of good quality, plus I've found Bosch wiper blades to be better than
    Anco. (IMHO)

    Back in 67 my friend got a new 911, with twin 3 barrel carbs. It had air
    injection and fouled the plugs every 1,000 miles or so. Bosch had an
    expensive platinum plug that was superb and that cured the fouling problem
    (along with a capacitive discharge ignition we build from a kit). Wonder if
    Bosch still offers those superb plugs in Europe?

    Richard.
     
    Richard, Mar 14, 2005
    #18
  19. Based on...?
    Boy, not me. I've found just the opposite.
     
    Daniel J. Stern, Mar 14, 2005
    #19
  20. Ken Peterson

    Ken Peterson Guest

    Personal opinion and examination. The other generic wires I have
    acquired from the various auto parts stores local to me were not as
    good. YMMV.
    I had Anco blades on this Voyager and they made horrible noises on
    anything but a very wet windshield. (drove the wifee crazy). I
    popped in a set of Bosch 28" blades, and that cured the noise problem,
    both in the blades and the wifee complaints! :)
     
    Ken Peterson, Mar 15, 2005
    #20
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