Sue,
I'd like to see the data to back that up.
I spent over a year getting the Champion 7440 / 7570 double platinum spark plugs manufactured for the PT.
I worked relentlessly with Federal Mogul (Champion).
Several thousand double platinum plugs have been installed in PTs all over the world.
There are no drawbacks to double platinum plugs in the non-turbo PT.
Remember, I worked with Champion on this project in 2000/2001, long before the turbo PT was even a rumor.
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