2020 Ford F-150 Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2020 Ford F-150 is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not "one size fits all" components, and using the wrong type can lead to a host of problems.

Heat Range: Each engine is designed to operate within a specific temperature range, and spark plugs are manufactured with a "heat range" to match this. A plug that's too "cold" won't burn off deposits effectively, leading to fouling. A plug that's too "hot" can cause pre-ignition (pinging) and potentially damage the engine. The factory-specified plugs ensure the correct heat range for your F-150's engine.

Electrode Metal: Modern spark plugs utilize different electrode materials, each with unique properties:

• Iridium: The most durable and expensive, iridium plugs offer the longest lifespan (typically 100,000 miles or more) and excellent performance due to their fine-wire팁electrode, which delivers a concentrated spark.
• Platinum: Platinum plugs are a step up from copper, offering a longer lifespan (around 60,000-80,000 miles) and good performance. They are often used as OEM plugs in many vehicles.
• Copper: While copper is an excellent conductor, copper-tipped plugs have the shortest lifespan (around 30,000 miles) due to the softer metal. They are generally less expensive but require more frequent replacement.

For your 2020 F-150, all engine options utilize iridium-tipped spark plugs as specified by Ford, ensuring long service intervals and consistent performance.

How to gap a spark plug

Properly gapping a spark plug ensures the ideal distance between the center and ground electrodes for a strong, consistent spark. While many modern iridium plugs come pre-gapped, it's always wise to double-check.

1. Obtain a gauge tool: Use a wire-type spark plug gapping tool. Coin-style gauges can damage fine-wire electrodes.
2. Check the gap: Carefully slide the appropriate wire gauge between the electrodes. It should have a slight drag.
3. Adjust if necessary: If the gap is too small, gently bend the ground electrode outwards with the gapping tool's adjuster. If it's too large, carefully tap the ground electrode on a hard, flat surface to slightly close the gap. Never bend the center electrode.

Refer to the "Quick reference" table above for the precise gap specification for your engine.

Replacement procedure tips

Replacing spark plugs on your 2020 Ford F-150 is a manageable DIY task for most mechanically inclined individuals. However, there are a few tips to ensure a smooth process.

• Coil-on-plug removal: All 2020 F-150 engines utilize a coil-on-plug (COP) ignition system. Each spark plug has its own ignition coil directly mounted on top of it. To access the spark plugs, you'll need to carefully disconnect the electrical connector and remove the coil. Use a gentle back-and-forth twisting motion if a coil seems stuck, but avoid excessive force that could damage the coil or connector.
• Anti-seize debate: There is ongoing debate regarding the use of anti-seize on spark plug threads. Ford, like many manufacturers, generally recommends against it for modern spark plugs with nickel-plated shells, as it can alter torque readings and potentially lead to over-tightening. Follow the manufacturer's recommendation. If you do choose to use anti-seize, apply it sparingly and reduce the specified torque by about 10-20%.
• Dielectric grease on boots: Applying a small amount of dielectric grease inside the spark plug boot (the rubber part that connects to the top of the spark plug) can aid in future removal and help prevent moisture intrusion, ensuring a good connection.
• Torque specs are critical: Always use a torque wrench to tighten spark plugs to the manufacturer's specified values. Over-tightening can damage the spark plug, cylinder head threads, or even crack the porcelain insulator. Under-tightening can lead to plugs vibrating loose, causing misfires and potential damage.

Known issues

Fortunately, the 2020 Ford F-150 does not suffer from the widespread spark plug-related issues that plagued some earlier Ford engines, such as the notorious two-piece spark plug breakage on the 3-valve 5.4L Triton engine.

The iridium spark plugs specified for your F-150 are robust and designed for longevity. The most common "issues" stem from improper installation, such as incorrect torque or neglecting regular replacement intervals. Always use genuine Motorcraft or recommended aftermarket spark plugs to ensure compatibility and performance.

Need plugs replaced? Find a shop on Repairius.