4 Pack Autolite Spark Plugs Brand New in Box

Autolite is a long-standing and well-regarded brand in the automotive ignition market, specifically known for its spark plugs. They have been manufacturing spark plugs since 1936.

Autolite offers a wide range of spark plugs, categorized primarily by the material used for their electrodes and their intended application. The different types are designed to meet varying performance needs, vehicle requirements, and budget considerations.

Here are the main product lines (or "brands" within Autolite) of spark plugs:

Autolite Copper Core (Standard):

Description: These are the most traditional and economical spark plugs, featuring a solid copper core center electrode and a nickel alloy outer material.
Pros: Good electrical conductivity, low cost, reliable performance for older engines.
Cons: Shorter lifespan compared to precious metal plugs, require more frequent replacement.
Best For: Older vehicles, small engines, and applications where frequent replacement is acceptable.
Autolite Platinum:

Description: Features a platinum disc welded to the tip of the center electrode.
Pros: Improved performance over copper plugs, quicker firing, smoother starts, better fuel efficiency, and longer life due to platinum's higher melting point and resistance to wear.
Best For: A step up from copper, suitable for many modern engines that benefit from longer-lasting plugs.
Autolite Double Platinum:

Description: These plugs have platinum on both the center electrode and the ground electrode.
Pros: Platinum-to-platinum firing virtually eliminates gap erosion, significantly reduces misfires, provides improved durability, and offers an extended lifespan (often rated for 100,000 miles). They are ideal for Distributorless Ignition Systems (DIS) common in most modern vehicles.

Best For: Modern vehicles with DIS, where long life and consistent performance are crucial.
Autolite Iridium XP / Iridium Ultra:

Description: Autolite's most advanced plugs, featuring an iridium-enhanced fine-wire center electrode. Iridium Ultra is the most premium offering.
Pros: Iridium is extremely hard, strong, and has a very high melting point, allowing for very fine wire electrodes that provide maximum performance, optimal fuel efficiency, quick acceleration, and superior durability. They offer excellent ignitability and are designed for extreme engine conditions and long life (often 100,000 miles or more).

Best For: Late-model vehicles, high-tech engines, and those seeking the ultimate in performance and longevity.
Autolite Racing:

Description: Specifically engineered for high-performance and demanding racing applications.
Pros: Feature elements like cut-back ground electrodes for optimal ignitability, anti-corrosive nickel plating, and yttrium-enhanced alloys for better heat transfer and resistance to intense conditions.
Best For: Race cars and vehicles modified for extreme performance.
Autolite Glow Plugs:

Description: These are specifically designed for diesel engines. They use a nickel-chrome alloy to quickly reach high heat intensity to pre-heat the combustion chamber for quicker, more seamless startups.
Autolite High Thread Pro (specific):

Description: An OE patented design exclusively for Ford 3V engines, featuring a fine-wire platinum design for focused ignition power and longer life.
How to Choose Autolite Spark Plugs:

The most important factor in choosing the correct spark plug is to match it to your vehicle's engine.

Consult your owner's manual: This is always the best source for the recommended spark plug type, heat range, and gap.
Use online lookup tools: Autolite's website, as well as many auto parts retailers, offer vehicle lookup tools where you enter your year, make, and model to find compatible plugs.
Consider your driving style and engine needs:
For standard replacement and older vehicles, copper plugs might suffice.
For modern engines and those looking for better performance and longevity, platinum or double platinum are good choices.
For the best performance, fuel efficiency, and longest life in high-tech engines, iridium plugs are the top tier.