I have grown kind of fond of the turbo plugs. Not having to find more copper gaskets all the time is worth it to me. I have used the same plug for nearly a season on my RB V12 3 port. It still runs great. I never put a new plug in for a club race unless it is absolutely toast. For bigger races, I generally run a new plug just for insurance. If I can't afford a few glow plugs, then I probably shouldn't be racing anyway. My Tire bill is probably higher than my whole car in a season.