UPDATE:
We just got back from a nice trip in my B-Plus 22.5 . I have had this unit since the begining of Feb and have had only one problem and that was with the aftermarket radio that was put in. I have the new 6.0 Chevrolet engine and I am running Mobile 1 Synthetic oil. My milage went from 10 City 12 Highway to 11.5 City 14 Highway. I am really happy with my gas milage . I wonder sometimes if someone at night isn't putting gas into my car as a joke. My dad did that to a neighbor one time about 40 years ago, he had just bought a new car and was checking the gas milage on it everytime he filled it it, my dad would fill up a 5 gallon gas can every other day and pour it into his tank at night. A few weeks later he mentioned to my dad how pleased he was with the gas miliage on his new car , it's getting aroung 35 miles a gallon ( it was a big LTD Ford ).