JohnA
Member
Sorry I hadn't updated y'all. Put iridium NKG372's in last week at 104+K. Ran a bottle of Techron (?) thru gas tank prior. All old, original from factory motorcraft came right out. were new design sfc509 w/antiseize. Most had worn down/missing center electrodes but no misfiring at replacement time. wife averages 14.5 mpg in last year per onboard computer. Car seems to have much better p/u and over last few days shows 14.9-15.0 mpg w/same driving habits (y'all know what I'm talking about, I'm sure). will update again after 1000 miles or so. Thanx for all the responses.
