Standard or U-groove Copper spark Plugs.

While a lot of attention has been paid to "Platinum" plugs lately, their advantage is purely in service life, there is little to no performance advantage. (to be honest I tend to see a hindrance) Nippon Denso Has the patent on U-groove. but only sells Copper core U-groove under the Denso name in Europe. Here they are Marketed by Mr. Gasket under the Accel Name. While I'm not one to buy into fancy plug hype, Nissan uses Denso Iridium U-groove Plugs when it adds ethanol capability. and those that are having issues with ethanol compability should pay attention. since it's true Ethanol is harder to ignite. with E10 mandate by 2009 in florida, it's a good way to help get a few MPG.




Accel U-groove $3.99 (A nice Cheap alternative at $1.99 Street price)





More details can be found at
Sparkplugs.com - Spark Plug 411