I would like to see tests on fuel quality. I know when the fuel prices started going up all my rigs lost power and milage. My Mustang GT was pinging idled rough. If the computer perameters can't adjust to the fuel, there is something seriously wrong!! I'm shure with that being the case our diesel quality went down the drain. How are we supposed to meet emissions and fuel mileage standards while trying to burn CRAP!! Sorry guys, I have an issue with tree huggers. I can't believe Bill Ford gave into them.