Platinum+4 Spark Plug
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Bosch Platinum+4 Spark Plug

Part No. 4428 Warranty  

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The Bosch Platinum+4 spark plug features unique revolutionary firing technology that combines the advantages of surface air gap technology, 4 nickel-yttrium ground electrodes and a heat-fused center electrode with pure platinum to provide optimum engine performance, smoother acceleration and top fuel efficiency.

Product Features:
  • Revolutionary surface air gap firing technology, featuring multiple spark paths, delivers a powerful spark for ultimate engine performance
  • Offers smoother acceleration, top fuel economy and maximum engine power
  • 4 yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion; yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
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Electrode Core Material:Platinum
Electrode Tip Material:Platinum
Ground Strap Quantity:4
Insulator Type:Pyranit
Manufacturer Heat Range:8
Resistor:Yes
Shorty Spark Plug:No
Spark Plug Seat Type:Flat
Tip Configuration:Surface
Type:FGR8LQP0

REVIEW SNAPSHOT®

by PowerReviews
BoschPlatinum+4 Spark Plug
 
3.2

(based on 21 reviews)

Ratings Distribution

  • 5 Stars

     

    (8)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (7)

57%

of respondents would recommend this to a friend.

Pros

  • Easy to install (12)
  • Durable (8)
  • Improves engine efficiency (8)
  • Increases power (8)

Cons

  • Decreases gas mileage (6)
  • No improvement in performance (6)

Best Uses

  • Everyday driving (8)
  • Replacement (8)
  • Performance driving (4)
    • Car & Truck:
    • Auto enthusiast (3), Mechanic (3)
    • Reviewer Profile:
    • Auto enthusiast (7), Mechanic (7), Casual driver (6), Truck enthusiast (5)

Most Liked Positive Review

 

Worth the money!

Every car I have ever owned I have replaced the spark plugs with the Bosch Platinum +4 plugs. You dont have to worry about getting the gap right and they work great. I...Read complete review

Every car I have ever owned I have replaced the spark plugs with the Bosch Platinum +4 plugs. You dont have to worry about getting the gap right and they work great. I notice a slight jump in the response of the accelerator. Not as much as replacing the air filter but still improvement.

VS

Most Liked Negative Review

 

Don't waste your money

Removed and replaced these plugs within 400 miles of installation. Spent the extra money and bought the NGK laser platinum. Much better performance from the NGK. these +4 really disappointed me.

Removed and replaced these plugs within 400 miles of installation. Spent the extra money and bought the NGK laser platinum. Much better performance from the NGK. these +4 really disappointed me.

Reviewed by 21 customers

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(1 of 1 customers found this review helpful)

 
2.0

not for dodge

By alex

from nashville,tn

About Me Auto Enthusiast, Competitive Driver, Mechanic, Truck Enthusiast

Ask me a question

Level 5

Pros

  • Easy To Install
  • Lightweight

Cons

  • Decreases Gas Mileage
  • No Improvement In Performance

Best Uses

    Comments about Bosch Platinum+4 Spark Plug:

    NOT for dodge vehicles.kinda actually decreases performance. and gas milage.

    Comment on this review(earn points)

    (2 of 4 customers found this review helpful)

     
    1.0

    Do Some Research Before Purchasing

    By Intrepid Lover

    from Cincinnati, Ohio

    About Me Auto Enthusiast

    Pros

      Cons

      • Fouled Prematurely

      Best Uses

        Comments about Bosch Platinum+4 Spark Plug:

        I had been using Bosch Platinum plugs since 1984 with great success and satisfaction. For that reason, I installed them in my 1996 Dodge Intrepid (3.5L engine), expecting the same performance and economy improvements that I had always enjoyed previously. Unfortunately, for this application, they were not a good choice. They fouled out prematurely (about 6,500 miles) and created a no-start condition. After replacing them with the OE Champion copper plugs (which yielded significant improvement), I Googled "Bosch Platinum +4 plugs). Many users had reported the same issue I had encountered. My assessment: if they're right for your application, they're a great plug. If not, they're a nightmare.

        Comment on this review(earn points)

        (2 of 4 customers found this review helpful)

         
        5.0

        excellent

        By amarildo

        from wakefield

        Verified Buyer
        Level 1

        Comments about Bosch Platinum+4 Spark Plug:

        good

        Comment on this review(earn points)

        (2 of 4 customers found this review helpful)

         
        5.0

        My 1st choice...

        By Master Engineer

        from Pittsburgh, PA

        About Me Auto Enthusiast, Mechanic, Overall Car Guy, Truck Enthusiast

        Pros

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

        Cons

          Best Uses

          • Everyday Driving
          • Performance Driving
          • Replacement

          Comments about Bosch Platinum+4 Spark Plug:

          I replaced the 2.8L V6 in my '86 Cherokee with a 3.4L GM crate motor. I put in a set of +4's with the new motor. After 110,000 miles it still has plenty of power and good mpg...24 mpg average. I've also used them in my '98 4.0L Cherokee for 70,000 miles...21 mpg average versus 18.5mpg with Champions. I'll be installing them in my Pontiac G8, 2010 Jeep Wrangler, and '96 F-250 5.8L.

          Comment on this review(earn points)

          (1 of 3 customers found this review helpful)

           
          4.0

          Noticable difference right away.

          By Zaz

          from Manahawkin. NJ

          About Me Mechanic

          Verified Buyer
          Level 1

          Pros

          • Increases Power

          Cons

            Best Uses

              Comments about Bosch Platinum+4 Spark Plug:

              Quality

              Comment on this review(earn points)

              (2 of 4 customers found this review helpful)

               
              5.0

              1988 jeep 6 cyl install

              By Schwag

              from Niles, Illinois

              Verified Buyer
              Level 1

              Comments about Bosch Platinum+4 Spark Plug:

              have not really driven yet so cna't comment on MPG - but this was my first install and it was super easy. after intall engine fired right and and ran very strong.

              Comment on this review(earn points)

              (2 of 3 customers found this review helpful)

               
              4.0

              works

              By reggie

              from lancaster co. Pa.

              About Me Auto Enthusiast

              Pros

              • Durable
              • Easy To Install
              • Good With Hi-performance
              • Improves Engine Efficiency

              Cons

              • Mileage Started To Drop

              Best Uses

              • Performance Driving
              • Used With Hi Output Coil

              Comments about Bosch Platinum+4 Spark Plug:

              used in 94 cherokee sport 4.0 std trans, hi-out put coil and wire set, mileage started to drop after 2 yrs, removed and cleaned plugs and it all came back like new

              Comment on this review(earn points)

              (2 of 4 customers found this review helpful)

               
              1.0

              runs rough

              By mike

              from pennsylvania

              About Me Auto Enthusiast, Truck Enthusiast

              Ask me a question

              Level 5

              Pros

                Cons

                • Decrease Performance
                • Decreases Gas Mileage

                Best Uses

                  Comments about Bosch Platinum+4 Spark Plug:

                  Not meant for my Jeep Cherokee.
                  makes my engine run rough.

                  Comment on this review(earn points)

                  (2 of 4 customers found this review helpful)

                   
                  4.0

                  More pep

                  By Ed

                  from Harlingen, TX

                  About Me Casual Driver

                  Verified Buyer
                  Level 1

                  Pros

                  • Easy To Install
                  • Increases Power

                  Cons

                  • Decreases Gas Mileage

                  Best Uses

                  • Replacement

                  Comments about Bosch Platinum+4 Spark Plug:

                  My 2002 Dodge Ram 1500 seems to have more pep. I did notice a decrease in gas milage maybe because my truck responds better and I get carried away with my lead foot.

                  Comment on this review(earn points)

                  (3 of 5 customers found this review helpful)

                   
                  1.0

                  not worth the money

                  By shadowman

                  from columbus, ohio

                  Pros

                  • Easy To Install

                  Cons

                  • Decreases Gas Mileage

                  Best Uses

                    Comments about Bosch Platinum+4 Spark Plug:

                    installed these, smoother running at lower rpm, i think just because they are new. mpg dropped, will go back to platinum plus.

                    Comment on this review(earn points)

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                    Do you have questions about this product?(earn points for answers!)

                     

                    Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                    4 Questions | 5 Answers
                    Displaying questions 1-4
                    • Q:

                      i have a 2008 liberty.would these bosch 4 point plugs help my gas milage?or fry my wires n other stuff?
                      Asked on 3/3/2011 by spanky from geneva ny

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Yes, this part fits your 2008 Jeep Liberty.

                        Answered on 3/4/2011 by David the Dynamite Parts Guy from AAP
                    • Q:

                      I installed these on my 2004 Jeep Grand Cherokee. Jeep runs great, pulls strong with smooth idle, but my gas mileage has dropped from 325 miles per tank to 275 miles per tank (consistent commute). I've read this about other plugs, like the E3. Has anyone seen the same. Is this just not a good fit for this vehicle.
                      Asked on 12/18/2010 by Ed from Cary, NC

                      1 answer

                      • CUSTOMER CARE

                        A:

                        I personally had a former Dodge/Chrylser/Jeep Master Certified Technician as an instructor recently. He always told us that the Bosch Platinum +4 and E3 spark plugs are the worse plugs for later model Dodge/Chrysler/Jeep vehicles. He told us that they decreased gas mileage and in many instances even fried/destroyed the coils in the ignition system. He recommended that with certain later model vehicles, you either use NGK Iridiums or copper core spark plugs.

                        Answered on 12/21/2010 by Mike the Auto Parts Master from AAP
                    • Q:

                      what is the expected life of the plus 4s
                      Asked on 3/27/2010 by lkn

                      1 answer

                      • CUSTOMER CARE

                        A:

                        From experience, I have seen these to last up to 100,000 miles on some vehicles.

                        Answered on 5/18/2010 by Mike from AAP
                    • Q:

                      when it means no gap then I dont have to adjust the gap right?
                      Asked on 1/4/2010 by Serg from Mission, TX

                      2 answers

                      • A:

                        Correct. It is already preset from the factory for optimal performance.

                        Answered on 3/13/2010 by John from Charlotte, NC
                      • A:

                        yes gap them with a hammer and pliers

                        Answered on 1/23/2010 by grease monky from texas
                    Displaying questions 1-4

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