So on my trip north this past weekend I only got 17 mpg on the highway with my 83.5 w/c Westy. That is my normal city mileage.  I should have gotten at least 20 if not 21-22.  All the usual suspects have been checked.  if anyone has any last minute suggestions for me that I can try this weekend let me know.  Otherwise it looks as though I will have to take it the expensive mechanic who I know is going to charge at least a few hours and still may not find something.

Thanks,
Bryan