Ford Spark Plugs: OEM Vs. Aftermarket

When buying new spark plugs for your Ford, you have two options:

  1. OEM spark plugs
  2. Aftermarket spark plugs

This comparison guide will cover both options and explain why one option is better than the other.

OEM Spark Plugs Defined

Replace ford plugs

Original equipment manufacturer (OEM) replacement spark plugs are made of the same materials, and produced to the same specifications as the spark plugs already in your engine. This means when you buy OEM replacement spark plugs, you’re getting the exact same high-quality plugs that are designed just for your Ford model.

Aftermarket Spark Plugs Defined

Aftermarket spark plugs aren’t guaranteed in quality and design like OEM plugs are. It’s because they’re produced by third party manufacturers that come up with their own spark plug design. They decide the type and quality of their materials without following OEM specs.

A lot of people are tempted to buy aftermarket spark plugs because they usually cost less upfront. But you’re actually better off with OEM spark plugs. Here’s why:

1. OEM Spark Plugs are Designed to Exact Tolerances

With OEM, you know exactly what you’re getting: a well-built spark plug that’s designed just for your Ford model. This means you’ll get optimized engine performance and the best fuel economy your engine can produce. This is because OEM spark plugs are built with high quality materials, including quality interference suppression resistors. And they’re designed to work specifically with your engine.

When it comes to spark plugs, design is everything. It’s because if a spark plug is even slightly longer or shorter than OEM specs, your engine’s power goes down and its fuel consumption goes up. So a spark plug needs to be the right length.

Also, the electrode design and shape matter a lot. Ford spent a lot of money researching and developing the most optimal electrode design that will maximize your engine’s horsepower and mileage. The electrode designs on aftermarket spark plugs are rarely tailored to your car’s OEM specs. If you put a generic aftermarket spark plug in your vehicle, you’ll experience a loss in engine power and an increase in fuel consumption.

2. OEM Spark Plugs Cost Less

Not only are OEM spark plugs inexpensive upfront when you purchase from (at wholesale pricing), but also they’re more affordable in the long run. Some aftermarket spark plugs may cost less upfront, but chances are good they’ll fail after a short time while OEM spark plugs will last much longer. So if you buy aftermarket spark plugs, expect to replace them more frequently than if you had OEM spark plugs in your car.

3. OEM Spark Plugs are Easier to Find

The sheer number of aftermarket spark plugs available can be overwhelming because they vary in quality and fitment. And not all of them are covered under warranty. You’ll have to do a ton of research on different aftermarket spark plug brands to determine 1) the quality, 2) fitment for your specific make and model, and 3) warranty. Even after doing all that research, there’s no guarantee you’ll find aftermarket plugs that are comparable to OEM ones.

In comparison, OEM spark plugs are incredibly easy to find. All you have to do is to look up your Ford here to find the right part number for your vehicle. It takes all but 2 minutes to do.

If you have any questions about the differences between genuine OEM spark plugs and aftermarket spark plugs, you’re welcome to reach out to us.