Page 4 of 4 FirstFirst ... 234
Results 31 to 39 of 39

Thread: Best Spark Plugs for Fuel Economy?

  1. #31
    Junior Member
    Join Date
    Aug 2017
    Location
    Texas
    Country
    United States
    Posts
    15
    Thanks
    0
    Thanked 5 Times in 5 Posts
    Omg. I put some Denso plugs in and my gas mileage dropped to 34mpg from an easily reached 44mpg. I'm running back to NJK immediately



  2. #32
    Senior Member
    Join Date
    Aug 2017
    Location
    Richland Center
    Country
    United States
    Posts
    1,816
    Thanks
    15
    Thanked 577 Times in 455 Posts
    Quote Originally Posted by Rndeleon1988 View Post
    Omg. I put some Denso plugs in and my gas mileage dropped to 34mpg from an easily reached 44mpg. I'm running back to NJK immediately
    I find that interesting, because rockauto.com carries the Denso plugs (not NJK) for the Mirage.

    DENSO 3433 {Click Info Button for Alternate/OEM Part Numbers} Iridium Long Life Info
    Gap .044

    Anyone else have a negative (or positive) experience with Denso Iridium plugs?

  3. #33
    Senior Member DonkeyPal's Avatar
    Join Date
    Mar 2019
    Location
    Central Illinos
    Country
    United States
    Posts
    113
    Thanks
    24
    Thanked 31 Times in 22 Posts
    So, do we have an agreement that whoever puts a set of NGK Ruthenium plugs in their Mirage will report any change in fuel economy?

    Remember: the thread question is about what spark plug choices might give better miles per gallon.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 automatic: 43.0 mpg (US) ... 18.3 km/L ... 5.5 L/100 km ... 51.7 mpg (Imp)


  4. #34
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    4,816
    Thanks
    2,735
    Thanked 1,602 Times in 932 Posts
    I've actually been in contact with NGK. They contacted me a few weeks ago to ask if I would like a set of Ruthenium HX plugs for testing. I told them that I'd love a set to try out in the Mirage. Sadly, they said that they made a mistake in their catalog, and that the plugs they have listed for the Mirage aren't actually correct. They are working to fix it. That being said, I would recommend waiting until they have this issue cleared up until actually ordering a set of Ruthenium HX plugs that are claimed to fit the Mirage. They said plugs for the Mirage will likely be available sometime in the summer of 2021, but they actually haven't been approved yet.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 47.2 mpg (US) ... 20.1 km/L ... 5.0 L/100 km ... 56.7 mpg (Imp)


  5. The Following 2 Users Say Thank You to Daox For This Useful Post:

    DonkeyPal (04-15-2019),inuvik (04-15-2019)

  6. #35
    Senior Member Mitz's Avatar
    Join Date
    Jun 2015
    Location
    Cavite
    Country
    Philippines
    Posts
    376
    Thanks
    27
    Thanked 190 Times in 126 Posts
    Quote Originally Posted by Daox View Post
    ...
    Sadly, they said that they made a mistake in their catalog, and that the plugs they have listed for the Mirage aren't actually correct. They are working to fix it. That being said, I would recommend waiting until they have this issue cleared up until actually ordering a set of Ruthenium HX plugs that are claimed to fit the Mirage. They said plugs for the Mirage will likely be available sometime in the summer of 2021, but they actually haven't been approved yet.
    Ouch... too bad about that..

    Their statement looks absurd to me though as the specs of the Ruthenium is about the same as their Iridium

    NGK 96355 LFR5AHX

    NGK 93298 LZFR5BI-11

    I have put my order for NGK 96355 on hold due to unavailability. I'm looking forward to try it as soon as it will become available.

    Name:  Summit Order Fail 2.jpg
Views: 323
Size:  52.6 KB

    Name:  96355 @ RockAuto.jpg
Views: 380
Size:  70.3 KB

  7. #36
    Senior Member Mitz's Avatar
    Join Date
    Jun 2015
    Location
    Cavite
    Country
    Philippines
    Posts
    376
    Thanks
    27
    Thanked 190 Times in 126 Posts
    I asked their Tech Support a direct-to-the point question.
    Name:  NGK Plug Inquiry 1.jpg
Views: 354
Size:  71.4 KB


    ... No reply to date.

  8. #37
    Senior Member
    Join Date
    May 2014
    Location
    Country is Europe, state is Germany
    Country
    Germany
    Posts
    707
    Thanks
    89
    Thanked 474 Times in 265 Posts
    The European models have either NGK DILFR6A11 or Denso FK20HR11 installed as OEM.

    In Europe, the NGK usually sell around €14.- or so, and the DENSO at around €9.- each.

  9. #38
    Senior Member Wallythacker's Avatar
    Join Date
    Nov 2016
    Location
    Niagara region
    Country
    Canada
    Posts
    928
    Thanks
    19
    Thanked 200 Times in 157 Posts
    Isn't it crazy how the same product, the spark plug is 14 euros which is about $22? Yet the same plugs just cost me $6.87 CDN which is about $4.50 US,
    Zero, 2014 ES Plus 5MT, written off but not forgotten.
    Zero II, 2014 SE, 5MT, climate She's HOME now!
    Shelby AKA "Cute", 2017 ES 5MT, A/C.

    Mirage owners look at the world differently than everyone else, but in a better way
    We're driving the Beetle of the 21st century, the greatest small car now available!

        __________________________________________

        click to view fuel log View my fuel log 2017 Mirage ES PLus 1.2 manual: 39.0 mpg (US) ... 16.6 km/L ... 6.0 L/100 km ... 46.8 mpg (Imp)


  10. #39
    Senior Member
    Join Date
    May 2014
    Location
    Country is Europe, state is Germany
    Country
    Germany
    Posts
    707
    Thanks
    89
    Thanked 474 Times in 265 Posts
    That is why I use the cheaper DENSO, which as far as I can tell, are practically identical.



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •