Apples and oranges, grapes and bananas.

Low sulfur fuel has some effect because my mileage is down from one year prior to it by about 3/10 MPG. My number is based on annual fuel burn and miles so I am not using a single tankful to draw the conclusion.

Newer coaches with EGR have much worse MPG than what my non-EGR coach gets.

Does anybody know the BTU content of low sulfur VS the earlier diesel blends?