I've just bought a 2002 K2500HD with the 8.1/Allison combo. I knew milage
would not be great but I didn't have the extra cash for the Duramax. Anybody
experiment with MPH/RPM range to get the best milage with the 8.1. I've hit
12.5. I really enjoy the truck, fully loaded LT with only 12K miles on it.
Thanks for any suggestions.