Spark plugs are the heart of the combustion process. If they are fouled or worn out, your Chevrolet Equinox will start to feel like it’s lost its "zip," your fuel economy will tank, and you might even see that dreaded "Check Engine" light blinking at you.

Consequences of Using Aftermarket Spark Plugs: Why OEM Is the Best Choice

1. Inconsistent Electrode Quality

Generic plugs often use lower-grade metals that wear down quickly, leading to an ever-widening gap and engine misfires.

2. Risk of "Engine Knock"

If the heat range is even slightly off, the plug can become a glowing hot spot, causing the fuel to explode too early. Ensure your valves are perfectly timed by checking your timing belt or chain.

3. Ceramic Insulator Cracks

Inexpensive ceramic can crack under the intense thermal cycles of a daily commute, leading to a permanent engine stumble.

4. Inaccurate Resistance Levels

If the internal resistor doesn't match GM's specs, it can cause electrical "noise" that interferes with your radio or sensors.

5. Difficult Starting in Cold Weather

Aftermarket plugs often require more voltage to fire, which can leave you stranded on a freezing winter morning.

6. Shorter Service Life

While OEM Iridium plugs can last 100,000 miles, many aftermarket options fail within 30,000 miles, tripling your maintenance work.

Don't settle for "multi-fit" plugs that aren't optimized for your VVT system. For help with your order, contact our team at Londoff Discount Parts today.