heres one thing you guys need to be aware of---------------ford 7.3's strokes, when they first came out, were ALMOST problem free..except about 1 year later--people were complaining the engine wasnt running just right,and would occasionally miss!!! guess what ford found out??? there werent enough detergent dispersants in other brands of oil, other than ford 15w40...the oil would start to foam--foam would get to the oil passages in the heads, hence the miss,or rough running!!!! so,make damn sure the oil is right--or you may have those problems...if you just putt,putt with your truck you may be ok..but if you start to push it,like pulling a trailer, or other heavy load,for a extended distance--problems!!! and the truck wont even get warm--just the oil wil get hot,and because its moving so fast, the oil cooler wont even have time to cool the oil down fast enough--and foam!!