These forums are great things. Problem is you find them when it is too late. For the common guy driving a pickup truck pulling a 5th wheel we (I) like to leave the service up to the mechanic. In my case I have trusted Ford Service. I and my wife looked forward to this nice long trip not even thinking there would be a problem since I had it into Ford Service before we left on our trip. A computer component that monitors fuel distribution was replace for a $1000. I have a chip that also does this, which I questioned with the mechanic, and said it had no effect. We live in Michigan. Arriving in Calgary, Alberta I stopped at a Ford Service to see why I was losing coolant. They diagnosed faulty EGR cooler. $3800 later the job was done. When we got on the road again I was losing more coolant than before. The Ford mechanic wrote up that the head gasket(s) were leaking. Was the replacement of the EGR cooler and Oil cooler really needed? So the story goes you learn the hard way.