Double Platinum Spark Plugs
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Autolite Double Platinum Spark Plugs

Part No. APP3924 Warranty Details  

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This premium plug provides outstanding performance and platinum-to-platinum firing

Product Features:
  • Super conductive Yttrium enhanced ground electrode provides superior heat transfer
  • Platinum enhanced high nickel alloy side electrode maintains precision gap
  • Platinum tip assures virtually no gap erosion for longer plug life
  • Easier starts, quicker acceleration and improved fuel efficiency
  • Heat range precisely set by Ionization Sensing Technology
  • Lifetime Limited Warranty*
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Electrode Tip Material:Double Platinum
Reach:3/4 in
Resistor:Suppressor
Seat Type:Gasket
Thread Diameter:14 mm
Tip Configuration:Power
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
Autolite Double Platinum Spark Plugs
 
4.8

(based on 14 reviews)

Ratings Distribution

  • 5 Stars

     

    (11)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (9)
  • Easy to install (8)
  • Durable (5)
  • Increases power (5)

Cons

No Cons

Best Uses

  • Everyday driving (9)
  • Replacement (7)
    • Was this a gift?:
    • No (3)
    • Reviewer Profile:
    • Casual driver (6)

Reviewed by 14 customers

Displaying reviews 1-10

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5.0

Heavy boost caused misfire, these solved that problem

By 

from Toms River NJ

Verified Buyer

Comments about Autolite Double Platinum Spark Plugs:

Used these in my built up 91 Capri XR2, had NGK in before and after awhile the insulator cone cracked and started a misfire under boost, which worsened o a constant misfire under any load. Another plug had track marks over the cone as well. After gapping these plugs to .038 i havent had a problem! The responsiveness is back and doesnt miss a beat even under full boost at 7200rpm. i'll update on these after a couple thousand because it seems most only last 2k miles in my car. hope this helps

  • Was this a gift?:
  • No

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(0 of 1 customers found this review helpful)

 
5.0

Good spark plugs

By 

from Danville, VA

Verified Buyer

Comments about Autolite Double Platinum Spark Plugs:

Entire process worked great!

  • Was this a gift?:
  • No

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4.0

Good Stuff

By 

from Houston, Tx

Verified Buyer

Comments about Autolite Double Platinum Spark Plugs:

Welp it solved my problem, car is running better now. Easy to install. Im not a mechanic, but I'd say its good stuff.

  • Was this a gift?:
  • No

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(0 of 1 customers found this review helpful)

 
5.0

Noticeable difference in performance.

By 

from Largo, FL

About Me Casual Driver

See all my reviews

Verified Buyer

Pros

  • Easy To Install
  • Improves Engine Efficiency
  • Increases Power

Cons

    Best Uses

    • Everyday Driving

    Comments about Autolite Double Platinum Spark Plugs:

    Installed easily.

    Comment on this reviewHelp Icon

     
    4.0

    Good spark plugs for the price.

    By 

    from Fayetteville NC

    About Me Auto Enthusiast

    See all my reviews

    Ask me a question

    Verified Buyer
    3 or more reviews submitted

    Pros

    • Easy To Install
    • Improves Engine Efficiency

    Cons

      Best Uses

      • Everyday Driving
      • Replacement

      Comments about Autolite Double Platinum Spark Plugs:

      Half the price of the NGK, which I normally prefer to use on Japanese brands. Great replacement for a quick tune up on a budget for older cars that you don't want to put too much money into. I'll recommend this product for anyone who is not looking for top performance but like to keep its dally driver at shape at a very reasonable price.

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      (2 of 5 customers found this review helpful)

       
      5.0

      How can you go wrong

      By 

      from KC.MO

      About Me D I Yer Self Wrencher

      See all my reviews

      3 or more reviews submitted

      Pros

      • 5 Year Warranty If Defect
      • Exact fit
      • Quality Brand

      Cons

      • Long Winded Threads
      • Need To Ensure Gap

      Best Uses

      • Exact Fit Dodge B250 318c

      Comments about Autolite Double Platinum Spark Plugs:

      I bought these for the REBATE and the 5Year Warranty. Please read to the end for helpful info.
      Looked the very same style and throw as the Champions I removed. Which I checked the Champ's for GAP's and they were worn to 60-65 and it still ran, go figure, hoping for better gas mileage now.
      Did check the Gap's on these new Autolite plugs and not a one was close to . 035 (In thousandths of an inch) they were .050-.055 GAP so do yourself a favor and check each one.

      Aside from the below information I found this which is quite interesting to me about the PLATIUM features-
      Ground Electrode Tip Material: Platinum Tipped
      Center Electrode Tip Material: Double Platinum
      seems like the double platinum is only on the Center Electrode.
      INFORMATION on these plugs:

      High nickel alloy side electrode
      Full platinum tips
      Necked-down center electrode
      Full copper core center electrode

      Description Copper Core, Double Platinum, Nickel Plated Shell.
      •OE Design for DIS systems
      •30% More Durable*
      •Full Platinum Tips - Platinum on both center and side electrode for reduced gap wear
      •Proprietary Platinum Ball Welding Process provides consistent point of contact for better adhesion
      •Optimizes engine performance, longer life, improved fuel economy and easier starts.
      Features platinum-to-platinum firing. Engineered to virtually eliminate gap erosion, reduce misfires, and provide up-to-100,000-mile durability.
      Man looking for the specific of the warranty I found in the 4pack container 1/2 of the plugs came in and I only wished that Advance Auto Parts stands behind them for the FIVE years and doesn't make you go to the manufacture.

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      (2 of 5 customers found this review helpful)

       
      5.0

      definitley i will buy it

      By 

      from fredericksburg va

      About Me Casual Driver

      See all my reviews

      Verified Buyer
      Helpful Reviewer

      Pros

      • Durable
      • Easy To Install
      • Improves Engine Efficiency
      • Increases Power

      Cons

        Best Uses

        • Everyday Driving
        • Performance Driving
        • Replacement
        • Restoration

        Comments about Autolite Double Platinum Spark Plugs:

        the service is good especially when i went to pick it up after i purchased on line. the only thing was wrong is that the part did not match what was in the car. so i went back and explained to the sale person and exanged righ away. i did take the old part with me and it waqs the original part and that made it so easy to exchange the spark plugs.

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        (3 of 5 customers found this review helpful)

         
        5.0

        Great Plug

        By 

        from NC

        About Me Casual Driver

        See all my reviews

        Ask me a question

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Easy To Install
        • Improves Engine Efficiency
        • Increases Power

        Cons

        • none

        Best Uses

        • Everyday Driving

        Comments about Autolite Double Platinum Spark Plugs:

        Works flawlessly.

        Comment on this reviewHelp Icon

        (5 of 8 customers found this review helpful)

         
        5.0

        Good Fit

        By 

        from Naperville, IL

        About Me Casual Driver, Mechanic

        See all my reviews

        Ask me a question

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Durable
        • Easy To Install
        • Improves Engine Efficiency

        Cons

          Best Uses

          • Everyday Driving
          • Replacement

          Comments about Autolite Double Platinum Spark Plugs:

          Good replacement.

          Comment on this reviewHelp Icon

          (3 of 8 customers found this review helpful)

           
          5.0

          Works Great.

          By 

          from Vermont

          About Me Auto Enthusiast, Truck Enthusiast

          See all my reviews

          Verified Buyer
          Helpful Reviewer

          Pros

          • Durable
          • Easy To Install
          • Improves Engine Efficiency

          Cons

            Best Uses

            • Everyday Driving
            • Performance Driving
            • Replacement

            Comments about Autolite Double Platinum Spark Plugs:

            It's a sparkplug. Make sure to check the gap before installation, two of these were almost double what the gap was suppose to be.

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            Displaying reviews 1-10

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            Do you have questions about this product?

             

            Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

            4 Questions | 4 Answers
            Displaying questions 1-4
            • Q:

              Is this item Pre-gapped. And does it fit my 2002 Infiniti g20t Manual.
              Asked on 3/28/2016 by Jose

              1 answer

              • CUSTOMER CARE

                A:

                Hi Jose, happy to help you! This Autolite Double Platinum Spark Plug (Part No. APP3924) is an exact fit for your 2002 Infiniti G20T and it is pre-gapped at .044 inch. However, when it comes to repair and maintenance it is always recommended referring the vehicle owner's manual for the exact specifications to get better and safer results.

                Answered on 3/29/2016 by Steve from AAP
            • Q:

              Are these properly pre-gapped for a 2003 Land Rover Discovery HSE?
              Asked on 6/16/2012 by Anonymous from Knoxville, TN

              1 answer

              • CUSTOMER CARE

                A:

                Yes, this part Autolite Double Platinum Spark Plug, Part No. APP3924 fits your 2003 Land Rover Discovery 4.6L. A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the spark plug from the factory will come with a gap to a pre-selected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy, and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode.
                For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

                Answered on 6/18/2012 by Aaron from AAP
            • Q:

              Are these plugs pre gaped?
              Asked on 4/19/2012 by Anonymous

              1 answer

              • CUSTOMER CARE

                A:

                A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the spark plug from the factory will come with a gap to a pre-selected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy, and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode. This part should be coming with pre-gap of 0.044''.
                For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.

                Answered on 4/20/2012 by Aaron from AAP
            • Q:

              have a 2004 isusu rodeo 3.5 gas engine, I was told that the APP3924 plug will work good in this vyhicle.You discribe this plug as a disel glow plug ? So my question is ,is this plug going to work on the gas engine in this suv?
              Asked on 2/2/2011 by Anonymous

              1 answer

              • CUSTOMER CARE

                A:

                Yes, this part fits your 2004 Isuzu Rodeo.

                Answered on 2/3/2011 by David the Dynamite Parts Guy from AAP
            Displaying questions 1-4

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