LoveTheWest wrote:
SO let me ask you guys this.  If you have a gas engine and you do run it up high miles -
what might the cost be to replace the engine ?
if you want to keep the rig you buy then you have to put in a new engine.  
what are the costs that go with it as well ?
thanks
Last 3 trucks we've bought have been north of 100k miles and never considered replacing the engine.
As mentioned, it depends exactly what went wrong but for similar issues, the diesel engine will cost a heck of a lot more to replace.
By the time you hit 20yrs old, it's usually cheaper to just pick up a replacement 10yr old truck.