spark plugs for 300e
I thought I remembered a post on plugs and it said not to use plat. only the supers,I had to use bosch plat. yesterday as I had a couple of fouled plugs and that was all I could find, I have some bad valve guides and haven't had time to put the new head on, I drove them 300 miles home and they were cleaner than the supers, should I keep running them?
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