View Single Post
Old 09-10-2016, 10:25 AM   #4
bull   bull is offline
 
Join Date: Feb 2015
Posts: 257
i have no idea 'where' the cone AF came from.

The ceramic color:

original- white

lean - white or almost white

proper - tan

rich - black

a proper running engine will take an overly rich plug and clean it to tan within about 500 miles of driving.
  Reply With Quote