Autolite HT0 Spark Plug

High Thread OE-Style Spark Plug

Autolite High Thread Pro spark plug HT0 is built for applications that call for a high-thread design and OE-style form, fit, and function. It uses a platinum center electrode, nickel ground electrode, and a tapered seat to support consistent ignition performance.

Compatible With select Buick, Chevrolet, Pontiac, Saturn, and related GM applications, including Fits 2009-2011 Buick Lucerne, N/A and Fits 2006-2011 Chevrolet Impala, N/A. The HT0 part number is also referenced as a direct replacement option for the same application.

Key Features

• OE-patented design focused on durability and a more complete seal.
• Platinum center electrode with fine-wire design for focused ignition.
• Copper core center electrode and nickel ground electrode for heat transfer.
• Resistor spark plug with 0.035 in. pre-gap and tapered seat.
• Extra-long special ceramic insulator for demanding ignition service.

Detailed Description

Autolite HT0 is part of the High Thread Pro line, a product line developed around OE-style replacement needs for Ford 3V engine applications and related high-performance requirements. This spark plug is engineered to deliver a more comprehensive seal, improved heat transfer, and concentrated ignition energy while maintaining the dimensions needed for proper installation. The HT0 part number appears in interchange listings with 12591131 and PZH0 for the same application.

Fits 2006-2010 Chevrolet Malibu, N/A, Fits 2006-2010 Pontiac G6, N/A, and Fits 2008-2010 Saturn Vue, N/A. It also fits 2006-2008 Chevrolet Uplander, N/A, 2007-2008 Saturn Aura, N/A, 2006-2007 Buick Terraza, N/A, 2006-2007 Chevrolet Monte Carlo, N/A, 2006-2007 Saturn Relay, N/A, and 2006 Pontiac Montana, N/A.

What It Is Used For

• Replacing worn spark plugs that cause rough idle.
• Restoring weak ignition performance and misfire conditions.
• Addressing hard starting from degraded plug electrodes.
• Supporting stable combustion in high-thread plug applications.
• Maintaining proper ignition output in service intervals.

Installation Notes and Tips

Verify engine application and thread style before installation. Confirm the specified gap and seat type match the vehicle requirements, and inspect the ignition system for wear that could affect plug performance. Use the HT0 part number and vehicle fitment data to confirm the correct application before service.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers and is a leading spark plug supplier. The High Thread Pro design is OE engineered for specific Ford 3V engine requirements and related applications.