hi
i have these plug platinum tip autolite
i check the user manual they recommend copper 5224
what's best???

 

Spark plugs are a very heated debate. It is all about personal choices unless you are running a boosted setup. IMO the plat plugs are better. If you are just looking for a direct factory replacement than get the copper ones.

 

hi
Yap i install patinum plug.
Seam to do just fine so far
Like i always say the dealer never put the best part on a new car or truck.
Usualy the have mopar plugs or autolite
was suprise to find champion plugs :-)

 

I threw some platinum plug's in my D and it wouldn't even stay running. The only advantage to running platinum is they last a little longer but for better performance you want copper, they get hotter. I now run OEM champions in my D and it feel like a million bux.