Put platinums in the 04 Hemi and they have 50K on them now.No problems.Lots of the new stuff just the recommended plugs are like 5 or 6 bucks each.Some are more.Just dd them in my brothers 06 Caravan and my cost with my sons employee discount was like 5 bucks each.On a not my kid just bought a 16 Trailhawk with the 6.Picked it up yesterday and fully loaded.Havent driven it yet.I guess he was tired of the Hemi challanger.Rocky