Ubernoober wrote:Even my 35 year old muscle cars hate the Bosch Plats. The only engine I can remember that liked them was the Jeep 4.0 HO. Its ran strong and they lasted an eternity.
Those 35 year old muscle cars, like our 240sx's, were never designed to run platinum spark plugs. In fact, the KA engines were designed to run with NGK's. As for the 4.0L Jeep, I think that engine will take anything you throw at it. Just a well built motor all around.
By the way, for the last year I ran Bosch platinums in my 240sx (I was really tired when I went to the store and they had signs everywhere that said bosch so it was the first brand that came to mind), and recently replaced them with the correct NGK's. I can't say it made that much of a difference, but I'll stick with what the engine was designed for from now on.