So, Jim, was the engine swap in your bus worth the trouble and expense? --Geoff
The only factual data I can present is my own situation. Our bus and toad weigh over 46K pounds (large toad). I have driven the coach over 52K miles and have averaged 7.7 MPG as measured by the SilverLeaf (directly off the engine ECM). I did not have any experience with the bus at this weight with the 6V92, but my best guess is that I would have gotten less than 6 MPG (remember we travel over the mountains a lot and weigh more than many buses). If the 6 MPG is close to being correct, my mileage improvement is close to 30%. Over the 52K + miles, I have used about 6,800 gallons. If I had used 30% more fuel that would have been an extra 2,000 gallons. Even at a conservative $2.50 per gallon, that would amount to a $5000 savings.