Dale Whitaker
ASE Master Certified Automotive Technician
Dale has spent more than 18 years diagnosing ignition and drivability problems in independent repair shops. At BestSparkPlugs he tests every plug we review and writes our install and troubleshooting guides.
Background
From Shop Floor to Reviews
Dale started as a lube tech at 19 and worked his way up to lead diagnostic technician. Over the years he has replaced thousands of spark plugs and traced misfires on everything from four cylinder commuters to V8 trucks, turbo imports and outdoor power equipment.
He joined BestSparkPlugs because he was tired of seeing drivers buy the wrong part from listings that copy and paste fitment claims. His goal is simple: give readers the same advice he would give a customer standing at his service counter.
When he is not testing plugs, Dale restores an old pickup and helps friends keep their lawn equipment running.
Credentials
- ✅ ASE Master Automobile Technician
- ✅ ASE L1 Advanced Engine Performance
- ✅ 18+ years in independent repair shops
- ✅ Lead diagnostic technician
Areas of Expertise
How Dale Reviews a Plug
Part numbers are matched to OE specs before anything is installed.
Out of box gaps are recorded with a wire gauge, not a coin tool.
Every plug is torqued to the maker's value and road tested.
Used plugs are inspected for deposits, erosion and gap growth.
Latest Articles by Dale
Can Bad Spark Plugs Cause a Rough Idle? Yes, worn plugs disrupt combustion, shaking your car. Learn how to spot the signs and fix the issue today.
What Do Fouled Spark Plugs Look Like? Learn to spot carbon, oil, and fuel-fouled plugs to keep your engine running smoothly and avoid costly repairs.
Do Spark Plugs Go Bad? Yes, they wear out over time. Discover the warning signs of bad plugs, replacement intervals, and how to keep your car running smooth.
Got a Question for Dale?
Send your vehicle details and the problem you are seeing. Dale reads every message.
Ask a Mechanic