Just completed a 1000 mile round trip to Ohio and back. Filled up getting on the turnpike and right after exiting back here in NY. 465.3 miles. Used 23.75 gallons for an average of 19.6 mpg. I managed to keep my speed between 65 and 72 and tried not to boost over 10 psig. The road is pretty flat between here and there as well. Straight stock everything on my truck. I am running Motorcraft Cetane Improver and nothing else. This is the first trip I made not hauling anything for a long enough distance to get a good solid number. There are many things that can skew results. A while ago Diesel World Magazine tested several things incrementally (synthetic oil, programmer, exhaust, and tounneau cover, and intake I think). What I got out of that article was the biggest bang for the buck came from the programmer and synthetic oil. The tounneau cover helped but I want that for other reasons and oh by the way it also gets me about another mile per gallon. The programmer, well I just do not want to take the gamble should something go wrong. I don't know it just seems to me possibly affecting the longevity of the engine for 2 or 3 mpg is somewhat short sighted....
http://www.dieselworldmag.com/content/view/88/59/
http://www.dieselworldmag.com/content/view/88/59/
The names have been changed to protect the innocent... (any body remember the closing of the old show, "Dragnet"?)
