Autolite AP65 Spark Plug

Autolite Platinum Spark Plug AP65

Autolite Platinum Spark Plug AP65 is an OE-style replacement spark plug built for dependable ignition performance across a wide range of classic and late-model applications. It uses a platinum center electrode for added durability, along with a nickel ground electrode and a ceramic insulator for stable operation.

For drivers servicing Chrysler, Dodge, Plymouth, Jeep, and other listed vehicles, AP65 supports easier starting, quicker throttle response, and improved fuel economy compared with standard copper plugs.

Key Features

• Platinum center electrode tip material for longer service life
• Nickel ground electrode with tapered tip design
• Resistor type spark plug with 4000 resistance
• Pre-gapped at 0.035 in. / 0.90 mm
• Flat seat, 14.0 mm thread diameter, 19.5 mm reach
• Mid-projection ceramic insulator for OE-style fitment
• Stud terminal type for common ignition connections

Product Details

The Autolite Platinum Spark Plug line is positioned as an OE-form, fit, and function replacement for many foreign and domestic vehicles. AP65 follows that approach with a standard/regular center electrode design and platinum-on-platinum construction at the firing end, helping maintain consistent spark performance over time. This part cross-references Champion Spark Plug 38 for the same application.

AP65 is a practical choice for owners searching for a platinum spark plug for 1980s and 1990s Chrysler, Dodge, Plymouth, Jeep, and related applications. It also appears in fitment for select Bentley, Rolls-Royce, Toyota Land Cruiser, Honda Civic, BMW 530i, and Mercedes-Benz 560SL applications, making it a broad OE-style ignition service part.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Rough idle from degraded ignition performance
• Slower acceleration due to weak spark delivery
• Reduced fuel economy from inefficient combustion
• Misfire symptoms tied to plug wear or incorrect gap

Installation Notes

Verify the vehicle-specific gap listed in the fitment notes before installation, since some applications call for a different setting than the plug’s 0.035 in. pre-gap. Confirm thread diameter, reach, seat type, and terminal style against the original plug before service. AP65 is listed for many vehicles including Dodge Caravan, Dodge Dakota, Chrysler LeBaron, and Jeep Grand Wagoneer, so matching the exact engine application is important.

Use proper torque procedures and inspect ignition wires, coils, and boots during spark plug service to help maintain consistent ignition performance.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, and this platinum spark plug is built to OE-style specifications for form, fit, and function.