Originally Posted by Herrsavage

I don't think Daniel Reckward and RMV Germany would recommend the P3 for RB engines (on Tornado fuel) it it were a "rookie mistake"... There are a lot of other very experienced racers here, sponsored included, who often swear by the P3... I'm the one who gets criticized for saying "in US forums they say don't run OS bla bla...." Everybody here runs P3's. I don't buy that they're only for rookies who don't know how to tune.

Which is not to say some other plug might not be marginally better. But again, RMV Germany would not be officially recommending P3's for RB engines with Tornado fuel without knowing what they're talking about.