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Thanks for the input Jim. That was the "sense" I got from of all the discussions about plugs on the Engine forum. I thought it might be nice to verify it.
Gale, I think you might complain to Ford about your dealer. At least let the dealer know you are aware of the TSB on the plugs and that you'd like a satisfactory explanation for the need for a head removal.
bsteele, everything I've ever read or heard about fuel in engines from reputable sources in my 67 years says do not use higher octane fuel than the engine wants. However, Bluejay should really answer your question.
- Jack
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2005 KR 4x4 SCrew 5.4 PHP Gryphon Tuned
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