drivingdiscodriving

I've been running the Platinum +4 plugs for about a month and have no complaints.

Deannostang

I have heard and read in many forums that (for some reason) Bosch platinum plugs are not recommended for use with Mustangs. NGK, iridiums, double platinums such as Motorcraft, etc. Has anyone tried this new technology plug? You can buy them from W.C. Whitney and some other outlets. Check out the site and let me know what you all think:

http://www.e3sparkplugs.com/

DrBob

Late to the party again with a reply. Let me tell you about my case for not using the Bosch+4. I once had a 1994 Thunderbird SC. I installed a smaller blower pulley, and removed the cats. Asked around for a good plug, and not knowing any better, put these in. Well, needless to say they were way too hot for the SC. I was racing a 91 GT and at about 110 the world came to an end. I detonated the #3 cylinder, blew the end of the plug out, and it embedded itself between the piston and cylinder wall. When the piston froze, the crank kept, well, cranking. Live and learn!

neogenic83

I have tried the +4's and 2's nither worked well in my car. always had a off-beat pop. yes the gap was right. went to the NGK's and never looked back. they have a wide range of heat ranges for any application