How to Find the Right Spark Plug for Your Vehicle

With thousands of spark plug options available, finding the exact right plug for your vehicle is important. Installing the wrong plug — wrong heat range, wrong reach, or wrong thread size — can cause serious engine damage. Here's how to get it right.

Use Your Vehicle's Year, Make, Model, and Engine

The most reliable method: use a fitment lookup. You'll need:

• Year: Model year of your vehicle
• Make: Brand (Ford, Toyota, Chevrolet, etc.)
• Model: Specific model (F-150, Camry, Silverado, etc.)
• Engine: Displacement and configuration (2.5L 4-cyl, 5.0L V8, etc.)

Check the Owner's Manual

Your owner's manual lists the OEM spark plug specification. This tells you the correct part number prefix and often the brand. This is the most authoritative source.

Understand Plug Specifications

• Thread diameter: 14mm is most common; 10mm and 12mm exist on some engines
• Thread reach (length): Must match your cylinder head depth
• Seat type: Flat (with gasket) or tapered — do not interchange
• Heat range: Engine-specific; wrong heat range causes fouling or overheating
• Gap: Verify against your engine's specification

Sticking With Quality Brands

When in doubt, stick with the OEM brand for your vehicle:

• Toyota, Honda, Subaru, Mazda: NGK
• GM, Chevy, GMC: ACDelco
• Ford, Lincoln: Motorcraft
• Chrysler, Dodge, Jeep: Champion

Find the right spark plugs for your vehicle at Texan Supply with free shipping on all orders.