Conversion Charts
  • Displacement Conversion Chart


  • Center Electrodes
  • iridium

  • Fine wire

  • Tapered center

  • Necked down


  • Ground Electrodes
  • Sidewire Technology

  • Cut back ground

  • Trimmed side electrode

  • Multi-ground


  • Resistor Types
  • Resistor


  • Precious Metal Types
  • Platinum


  • Plug Problems
  • Fouling

  • Bridging

  • Deposits

  • Pre-ignition

  • Flashover

  • Quenching


  • Ignition Anachronism
  • Distributorless Ignition System

  • DIS

  • Capacitor Discharged Ignition

  • CDI


  • Manufacturer's Numbering System
  • Autolite

  •    

        Not all spark plugs are created equal.

    Some spark plugs can improve performance, while others offer long life. Some can make your lawnmower easier to start, while others resist fouling. For most of the applications you look up at this site, whether its for a car, boat, lawnmower or generator, you will find the prices for a plug as low as $2 or as high as $5. So why spend $5 for a spark plug when a $2 plug will screw in and start your car? Well, to be honest, if you are just tuning up your car to pass smog so you can sell it, it isn’t cost effective to purchase the highest quality double platinum plug. But if you are planning on keeping that car or the outboard motor your tuning up, the plug you choose can improve ease of starting, acceleration, fuel economy, as well as how soon you have to change them again. In short, there are horsepower and mileage improvements available from different spark plugs.

    To help you decide which plug is best for you we have categorized the spark plugs according to quality level and construction features. We have also explained and illustrated the differences in what may appear to be similar plugs. AutoliteSparkPlugs.com has compiled technical spark plug information and provided sparkplug charts and a comprehensive spark plug cross reference to help you make an informed decision on the best spark plugs for your application.

    Whether you are a racing engine builder or just tuning up your lawnmower, Autolitesparkplugs.com will become your source for Autolite spark plugs. After searching through the plugs available and selecting the best plug for your needs, we will have it in stock and ship it to you immediately, (usually the next business day).
    sparkplugs.com
    P.O. Box 772
    Sun City, CA 92586
    Toll Free Phone Number: 888-800-9629
    Out of U.S. call 951-672-8501
    Sparkplugs.comTM 2008. All rights reserved.  


    Home   View Cart   Ordering Info   Contact Us   FAQ   Spark Plug 411   Advanced Tuners

      Site Terms   Privacy Policy   Site Disclaimer