How Iridium Spark Plugs Have Evolved with Engine Technology
True iridium alloy spark plugs are the experts’ choice when replacing their spark plugs to meet or exceed OE specifications for performance in late-model engines.

VIDEO: Should You Use Anti-Seize On Spark Plugs?
Anti-seize can alter the tightening torque up to 20%, increasing the risk of breakage. This video is sponsored by Autolite.

Iridium Aftermarket Spark Plugs Offer OE-Level Performance
Aftermarket parts manufacturers live to push the boundaries of performance.

VIDEO: Ignition Coil Secondary Ignition Waveforms
Watch this week’s garage video on the “burn line” of a secondary ignition waveform. This video is sponsored by Autolite.

VIDEO: Can You Replace Spark Plugs On A Hot Engine?
Installing a spark plug with the engine hot can change the torque specification. This video is sponsored by Autolite.

VIDEO: Inspecting Spark Plug Appearance
A spark plug can reveal short- and long-term problems if you know where to look. This video is sponsored by Autolite.

VIDEO: Guess The Spark Plug Replacement Interval
Are you a master of spark plug intervals? This challenge will prove it. This video is sponsored by Autolite.

VIDEO: To Gap Or Not To Gap Spark Plugs
Find out what spark plugs need to be gapped and the tools required to get the job done. This video is sponsored by Autolite.

VIDEO: Misfires In The Ignition System
It is so important to correctly diagnose misfires before repairs. This video is sponsored by Autolite.

Autolite Announces New Premium Packaging For Iridium Ultra Spark Plug
Iridium Ultra spark plugs feature an ultra 0.5 mm finewire iridium center electrode tip design with laser-welded technology for optimal ignitability and performance.

Autolite Tech Tip: The Anti-Seize Debate
There is a debate about whether or not to use anti-seize when installing spark plugs.

I Spy Spark Plug Fouling
As a plug’s service life is coming to an end, or if the plug is suffering from an improper gap, symptoms of fouling may start to show.
