I have had both and never had a problem with either. My 3 valve per cylinder now has 76,000 miles on it changed oil and greased front end. add track bar and new sway bay bushings font and rear since 2006. They only warning we go was spark plugs blew out of the 2 valve per cylinder that never happen to me. This new one has a problem with plugs also ford plugs have a metal cover around the end of plug. some times it will brake off in side I removed all 10 replaced all will solid plugs by champion solved that problem.
