Guys;
Take a look at this plug and give me your opinions....It is the # 1 plug from my 351-W,it is a champion plug,all the other plugs look about the same.... I have read a bunch of stuff about "reading plugs" but none say much about the "fire ring" or base of the plug next to the edge of the threads..... Electrode and tip stay grey to light brown and the porcelin stays a light color,but the base stays black and kinda sooty..... Car runs fine,running 93 octane pump gas,have run 4 gallons of 112 leaded race gas mixed with 12 gallons of 93 pump gas,plugs look about the same not much if any difference.........
Opinion please!!!!!!!!!!!!!!!!!!!!!!!!!!!
David
