I've tried numerous plugs over the years in my cars, with the widest
variety going into the TR-6. And I can honestly say, that at this point,
there is nothing I will put in the car but Champions. They just plain work.
Period. Delco's come second, and I will not buy another set of Bosch or NGK's.
Though, for the RX-7, the *only* thing I would use is NGK, so the bias is
not brand loyalty, it is performance specific.
Several folks who work on B-c's professionally have categorically stated
do *not* put platinums in old lbc's. It's not worth the expense and they
foul out very quickly.
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