series 60 mileage and speed

[davidbrady]

You're running a much taller final drive than I am Tom. I'm running a 4:78 and I'm at 1555 rpm's on the S60 at 62 mph. If you're at 1400 rpm's at 62 that means you're running closer to a 4.30 final drive. That'll make a difference. I've been told by folks in the know that for the best S60 fuel economy to keep the rev's between 1450 and 1550 which is what I try to do. After 110,000 miles I see low 7's on my Prodriver which I've corroborated using the old fashion approach (and probably the most reliable approach) of measure miles and gallons pumped at the station and doing the manual calculations. After many thousands of miles and doing the paper approach I've seen some folks in the Prevost community (with the same vintage buses as ours) report closer to 8 mpg, but they're typically lighter than me. With your weight when you hit the serious hills you're bound to see a correction. If not, you gotta tell me where I can get the helium that you're pumping into your tires! ROTFL