Did someone have a service bulletin number that pertained to the DIC reading to high? When I first got my vehicle the DIC would read maybe a mile or two lower then what the actual mileage was. Lately seems to intermittently read high one time and low the next. Right now we are on a trip and the DIC was reading 29.3 on my first tank and it figured out to 24.6. I'll probably run three or four more tanks through it before we get home so I'll be keeping an eye on it.