Personally I've had a diesel and it pulled my jeep just fine up some of the tallest mountains around, Now I have a V-10 and it pulls the jeep just the same only a little faster. A lot is about torque but its also about gearing. Some say they get a little freaked out when the gas motor revs. high, not me, I run motors at 5 to 6 thousand RPM all the time. If thats the way they are designed, then its just fine. Nothing wrong with a ford V-10. Its one hell of a motor. So what if it only lasts 3 or 4 hundersd thousand miles, does a great job for what it is.