An 8V71 is a different animal altogether. 8V71s will get 2 or 3 MPG better than a 6V or 8V92.
Quote from: NJT5047 on September 11, 2007, 07:28:30 PMAn 8V71 is a different animal altogether. 8V71s will get 2 or 3 MPG better than a 6V or 8V92. JR -If you're talking about the 8V71 in a GMC, you're correct. The 40-foot Buffalos are also about 3,000 lbs lighter than the others, which accounts for a lot of that difference. 4106s are lighter still, which is one reason they were so popular with operators, due to their economical and dependable operating characteristics. The Scenicruisers, OTOH, return mileage similar to MCIs, since they're heavier.However, IBME that the 8V71 in an MCI, Prevost or Eagle (all three-axle, forty-foot coaches), gets virtually identical mileage as the 6V92TA, somewhere in the 5.5 - 6.5 mpg range. BTDT, have the log books. . .102A3 MCIs with OEM 8V92TAs are out there, probably more common west of the Mississippi due to the Rockies and the Sierras.I believe Wade was looking at and trying to decide between a 1990 102C3 with the 8V92TA powertrain, vs an 1984 Eagle with the 6V92TA. My recommendation still stands: Buy the newer coach.FWIW & HTH. . .