[Christ]

I personally slap NGK plugs in just about everything, in the same heat range as the OEM requires, unless I've done proper experiments to find out that a colder or hotter heat range makes a positive difference.

Bosch multi-electrode plugs are mostly garbage... in just about every case I've seen/heard, they don't perform up to par with most other performance oriented plugs.

I have actually heard people speaking against the use of multi-electrode plugs, saying things like "your 4 cylinder requires and occasional skip in the ignition system to run properly... the multi-electrode plugs don't allow that skip, and they'll make your engine run funny."

That came from a bunch of GM techs... and it's obviously a load of crap, but I still wouldn't use them, for the price vs. benefit.