I was wondering what are your favorite spark plugs and why?

I'll be putting them in an '05 4.0L SOHC V-6, but I imagine (could be wrong) that a good, solid, high performance plug will do well in any Mustang engine.

I've used Platinum and Copper NGK's before with good luck and have used the Bosch +2 in a little 4-Banger Saturn with phenominal results.

How are the E-3 Diamond fire plugs?
What about the Pulse-Star plugs ($24.00 ea? YIKES)?
Bosch?
Any others you have used?

 

Autolite copper cores.

 

used platinum +4s in both my first stang and my 78 trans am both pleased me and the fact that there is no need to gap is pretty cool havent changed the plugs in current stang

 

Yeah, have the +3's in my exploder, love em, no gapping. I have just good ole' motorcraft in my mustang, will be looking at the e3's though.

 

No comments on the Pulse-Star?

I figgured it was hooey and junk.

 

+1

thats what i run

no problems