About This File
Never use an interchange chart to determine an alternate make and number of spark plug for a specific engine.
Use an interchange chart only to determine the physical characteristics of an alternate plug - wrench size, thread size and reach.
Go to the alternate plug maker and determine the plug they recommend for the application. They are the only ones that know the optimum plug for the application. There is a big difference in the heat ranges between plug manufacturers.
AC
1 page 168KB
Autolite
1 page 176KB
Bosch
2 pages 645KB
Champion
1 page 330KB
Denso
1 page 376KB
Motorcraft
2 pages 993KB
NGK
1 page 309KB