After hearing all the horror stories from the Ford guys & those stupid 2 piece spark plugs, what is the best practice for life & maintenance of spark plugs in the hemi engine? I have an '09 with 90,000 miles.
thanks,
Mike S

 

 

That's what the Ford maintenance schedule says too & we all know how well that turned out.....
Mike Sal

 

What plugs are installed from the factory? Are they multi-prong platinums?

 

 

This is why I brought it up to begin with. I'm curious what experiences other hemi owners have had regarding plugs for these engines.
Mike Sal

 

Copper plugs: About 30K miles between replacement.

Rare-Earth plugs: Supposedly 100K..... Or, until they start causing problems in engines that weren't designed for them.......

 

Changed mine at 25,000, got a little over 41,000 now, was a bit of a pain.

 

Blue, what brand of plug did you use?
Mike S

 

Pretty sure I used autolite plugs.