Best sparkplug for a 4.2L
6 Answers
Thank you. Do you know what # plug to use
2 people found this helpful.
enginecreator answered 7 years ago
Ist OEM choice is Standard: MOTORCRAFT SP504 {#AGSF34FM, AGSF34FMF4, AGSF34FMF6} Finewire Platinum, Gap: .044. OR 2nd choice is upgrade to: MOTORCRAFT AGSF34FM Platinum-Nickel Plated Shell, Suppressor Sprk Plug 2 Engine CODE PLATINUM FINEWIRE - NICKEL PLATED SHELL. Gap: .044.
3 people found this helpful.
I like Motorcraft also. Motorcraft parts are designed by Ford to work best in your vehicle.