SPARK PLUGS:

Denso Iridium plugs are much harder and can withstand more heat than platinum, but only with single ground electrode. Bosch Platinum +4 gives 4 ground electrodes but is made of platinum instead of iridium. What do you guys have to say about this and what would you choose?

Denso Iridium: $11.99 each

Bosch Platinum +4: $5.99 each

 

Considering all the work that needs to be done to replace the plugs on your V6 (based on your avitar)- I wouldn't risk anything other than NGK or ND Iridium plugs in your engine. Bosch plugs work well in Euro engines but just don't seem to run well in Asian Imports.

Joel, CA