Automotive
How to Avoid Cross-Threading Spark Plugs: 6 Rules That Work
Cross-threading a spark plug is the most expensive mistake in the DIY tune-up world. One moment of impatience — a plug started at a slight angle,…
Automotive
Anti-Seize on Spark Plugs: Yes or No? The Real Answer
Bring up anti-seize on spark plugs in a room full of mechanics and you’ll get a bar fight. The old guard swears by it…
Automotive
Should You Replace All Spark Plugs at Once? My Shop Answer
A customer asked me this last week while I was halfway through his four-cylinder: “You’re doing all four, right? My buddy said you only…
Automotive
Best Spark Plugs for Fuel Economy: The Honest Answer
Every few months, a customer slides a printout across my counter — some forum thread claiming a miracle spark plug gained them 4 MPG.…
Automotive
Spark Plug Heat Range Explained: Hot vs. Cold Plugs
Of all the spark plug specs that confuse people, heat range is the champion. Gap is intuitive — it’s a distance you can measure.…
Automotive
Spark Plug Replacement Cost: What You’ll Actually Pay
“How much to change the plugs?” might be the most common question I hear after “is it serious?” And the honest answer is the…
Automotive
Spark Plug Torque Specs: How Tight Is Tight Enough?
If I had to pick the single most misunderstood part of a spark plug job, it isn’t the gap or the heat range —…
Automotive
Copper vs Iridium Spark Plugs: Which Should You Actually Buy?
Walk into any auto parts store and the spark plug aisle looks like a jewelry counter now. Copper, platinum, double platinum, iridium, ruthenium —…
Automotive
What Worn Spark Plugs Look Like: A Mechanic’s Visual Guide
The first thing I do with every tune-up that rolls into the shop isn’t scan the computer — it’s pull the plugs and lay…
Automotive
Iridium vs Platinum Spark Plugs: Which One Should You Buy?
Walk into any auto parts store and the spark plug aisle presents you with a wall of small boxes at wildly different prices —…