I guy I work with swears by them and has gotten proven positive results with these in his older blazer as well as in an older lincoln, just curious of anyone else has used them. I picked them up today for 5.99 a piece the same price as the A/C Delco Doub le Platinums, so we will see how they work out for me.

Joel

 

should have got the a/c delcos

 

deffintly should of gone with AC Delco's

 

It is my opinion that you should run the AC Delco sparkplugs that the truck calls for. Aftermarket plug manufacturers have to try and cater to a wide range of applications and may or may not be of the correct heat range, resistance, etc for your particular vehicle.

 

I use AC Delco Rapidfires ... I had Autolite Double Platinum in her when I got mine and it made a noticeable difference. the MSD Streetfire Coil could be playing a part in that also though lol

 

replacing worn plugs with new plugs also always makes a difference

 

i have the E3 spark plugs and they work great . better response, and can tell gas mileage went up

 

i love when people try a gimmick spark plug and in the first few weeks they are like oh they work great my gas millage is better etc etc. anything is better than the worn plugs and wires you just replaced. the problem is the new plugs wont last nearly as long and after a few months you'll start getting misfire codes and skips and the engine will stumble. And then you'll put the a/d delcos in and they will last well over 50k miles

 

Exactly what I was gonna say. OP you said your friend has proven results does he have dyno sheets to prove it or just his butt dyno?

 

We just started selling these at work. Don't have any personal experience with them, but they look interesting to say the least.