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
 
3.3

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (7)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (6)

61%

of respondents would recommend this to a friend.

Pros

  • Easy to install (11)
  • Durable (8)
  • Improves engine efficiency (8)
  • Increases power (8)

Cons

  • Decreases gas mileage (5)
  • No improvement in performance (5)

Best Uses

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

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 notice...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 18 customers

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Displaying reviews 1-10

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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)

     
    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)

         
        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)

         
        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)

         
        1.0

        runs rough

        By Mike

        from pennsylvania

        About Me Auto Enthusiast, Truck Enthusiast

        Ask me a question

        Level 4

        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)

             
            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)

            (1 of 1 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)

              (1 of 2 customers found this review helpful)

               
              5.0

              Bosch PLatinum + 4 spark plugs.

              By William

              from Chicago, IL

              About Me Casual Driver

              Verified Buyer
              Level 1

              Pros

              • Durable
              • Easy To Install
              • Improves Engine Efficiency

              Cons

                Best Uses

                • Everyday Driving

                Comments about Bosch Platinum+4 Spark Plug:

                This my second set of Platinum + 4 spark plugs. Last time I changed my plugs was 50000 miles, my car just turn 100,000 miles. tPlugs last for a long time as the warranty said.I am using on a 6 cyl Jeep Wrangler, when I do long distance driving,I see improvement on gas. It cost a little more, but I only have to change my plugs every 4 to 5 years. So it came out cheaper than using the standard plugs. To me money well spent on the Platinum +4 plugs.

                Comment on this review(earn points)

                (1 of 1 customers found this review helpful)

                 
                5.0

                Spark Plugs are Great

                By Kathryn

                from MD

                About Me Casual Driver

                Verified Buyer
                Level 3

                Pros

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

                Cons

                  Best Uses

                  • Everyday Driving
                  • Replacement

                  Comments about Bosch Platinum+4 Spark Plug:

                  Easy to Install

                  Comment on this review(earn points)

                  (1 of 1 customers found this review helpful)

                   
                  4.0

                  so far so good

                  By chet

                  from windsor locks ct.06096

                  About Me Auto Enthusiast, Casual Driver, Mechanic, Retired enthusiast, Truck Enthusiast

                  Ask me a question

                  Verified Buyer
                  Level 1

                  Pros

                  • Easy To Install
                  • Improves Engine Efficiency
                  • Increases Power

                  Cons

                    Best Uses

                    • Everyday Driving

                    Comments about Bosch Platinum+4 Spark Plug:

                    plugs havent been in long enough to see if there's a difference

                    Comment on this review(earn points)

                    Displaying reviews 1-10

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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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