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Learning Center

ISO vs. JIS Spark Plug Heights

What are ISO and JIS plug heights? Read More

Tapered vs. Gasket Seat

Spark plug seats are not interchangeable... Read More

Does a Spark Plugs Hex Size Matter?

A plugs hex size determines the socket required for installation... Read More

How is a Spark Plugs Reach Calculated?

A spark plugs reach is calculated by the length of the threads... Read More

How are Spark Plug Threads Measured?

A spark plugs threads are comprised of three dimensions... Read More

Spark Plug Insulator Design

What is the spark plug insulators purpose? Read More

Rolled vs. Cut Threads

A spark plugs manufacturing process affects installation and structural integrity... Read More

Common Spark Plug Problems

Let's explore three common problems in the firing sequence... Read More

What are Autolite HT Plugs?

Autolite's HT or "High-Thread" design offers more power by... Read More

Car Maintenance Checklist

Routine auto care and preventative maintenance helps keep your car safe and dependable. Read More

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