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Autolite Platinum Spark plug 8308320
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  • Part #: AP3924|
  • SKU: 8308320

Available today

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    • OE Approved
    • Platinum Ball on the Center Electrode minimizes gap erosion for longer life

Autolite Platinum Spark plug

Provides a center wire platinum firing tip. Benefits include reduced gap erosion, fewer misfires, better performance and more durability. 3 year limited guarantee.
  • OE Approved
  • Platinum Ball on the Center Electrode minimizes gap erosion for longer life
  • Proprietary Platinum Ball Welding Process provides consistent point of contact for better adhesion
  • Fewer Misfires & Reduced Gap Erosion
  • Optimizes engine performance to provide improved fuel economy
  • Three Year Limited Guarantee
Since its inception, the Autolite brand has provided the automotive aftermarket and Original Equipment manufacturers the highest quality ignition products. As a leading supplier of spark plugs, ignition wire sets and Coil-on-Plug boots, the Autolite brand has the right ignition products for you, regardless of your vehicle make or model.

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Thread Size/Diameter
Hex Size
Rib Configuration
Center Electrode Core Type
Copper Core
Terminal top fixed or threaded
Thread Reach
Seat Style
Heat Range


Autolite Platinum Spark plug is rated 4.6 out of 5 by 18.
Rated 5 out of 5 by from as expected Works as expected. Car starts easier. Gas mileage improved.
Date published: 2015-10-20
Rated 5 out of 5 by from autolite spark plug Excellent parts for it price, accurate, great performance Easy to install.
Date published: 2015-05-28
Rated 5 out of 5 by from Great plugs Great price, and had rebates. Fit perfectly, engine ran beautifully after installation.
Date published: 2015-01-20
Rated 5 out of 5 by from good It's good
Date published: 2015-01-17
Rated 5 out of 5 by from good It's good
Date published: 2015-01-17
Rated 5 out of 5 by from Autolite Platinum Spark Plug I replaced this Platinum grade over the original Copper Resistor spark plugs because I want my old engines to run cleaner and burn more leaner comibushable cycles and less carbon deposit in the valves and head. I have countless of thousand miles on my S10 truck and I have decided to upgrade to a better spark plugs to run smoother, more power and better MPG. Also, it does helps to PASS smog testing results.
Date published: 2014-12-28
Rated 5 out of 5 by from Autolite Spark Plugs Chrysler Corporation used to use & recommend Autolite spark plugs until Ford bought Autolite in 1961. So Chrysler switched to Champion spark plugs instead. Ford sold Autolite to Bendix in 1973, and Allied Signal bought Bendix in 1983. Ownership becomes very confusing after that, involving Honeywell and later Fram. Autolite, Champion, and AC all make excellent spark plugs.
Date published: 2014-12-22
Rated 5 out of 5 by from good OEM plug good OEM plugs in my 03 ford the stock set lasted 100k miles so i am good for another 100k
Date published: 2014-12-15
Rated 5 out of 5 by from spark plug and complete tune up I think the Quakertown Pa. PepBoys has the best service specialist and technician I have gone to different Pepboys and never received top service. Joe who is always at the service desk is very honest and professional and always there to help.
Date published: 2014-08-11
Rated 4 out of 5 by from AP104 Good spark plug. Fits properly, was gapped properly - fired up right away after installation.
Date published: 2014-07-03
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