Do you have professional experience across a wide amount of engines and manufacturers? There is quite a difference in aftermarket parts versus OEM. The comments I left are by a professional factory trained Master Automotive Technician with 35 years experience working in dealerships. I was a full line technician capable of any repair but my specialty was electrical, drive ability, engine repairs, HVAC and convertibles.
I hope your drawing first blood is not taken as some type of personal attacks, getting us both banned...I am keeping this as clean and well mannered as simple words permit. I do not take your words as an attack, nor offer one at you. Simply sharing experience, and ideas.
Suffice to say, I very likely have you beat by a decade plus, experience wise, and am confident my experience in suspension tuning, engine building, chassis setup, race prep, metal structures, composite structures, two stroke tuning, four stroke tuning, fabrication, advanced electrical plus electronics and more for automotive, powersports, aircraft and DOD projects sometimes and often leads myself, customers and racers I help away from simple production parts and specs, differs from your dealership experience.
As they say, race on Sunday, sell on Monday.
Yes, I run Denso spark plugs in the Spyder, plus I do not run oem oil, brake fluid, coolant, air filter, exhaust, tires, headlights, foglights, or seat. The engine air ducts are modified and ambient pressure / temp sensor is relocated, certain items have exotic insulation applied, I have determined my own best alignment specs and do have the special tools and equipment of BUDS, BUDS2, and a ROLO Laser Alignment setup, plus tire changing capability and dynamic balancing, and of course, calibrated high end torque wrenches. Yes, I do know how to use the equipment also.
So with that, and not wanting to get banned again, as the original person posted, to answer his question, yes, I run different brand spark plugs than oem.