on a good day.... 8 on a normal day about 5.5 to 6.5 I won't tell you what a bad day of climbing into a headwind pulling a 18' flatbed trailer is.
What I'm looking at is half the fuel millage from an auto. Is it the 8v71 vs the 671 or is it the tranny.
Mike, The fact that there is more horspower available with the 871 means it can burn more fuel, However if the 871 is driven so no more power than the 671 could give is used it is possible to get the same mileage if gear ratios, weights, etc. are the same. But most of us use all the power we've got accelerating and climbing hills. In the case of 'V' drives the popular V730 has a lower gear ratio than the typical 4 speed in addition to being less efficient. More modern fuel controls, turbochargers and 4 stroke engines all are more fuel efficient than the WWII designed 2 cycle Detroits.RegardsJerry 4107 1120
Just trying to wrap my head around the loss of 40% of the fuel mileage. Also, thinking that there might be a single cause, but apparently I was mistaken.
MC8 8V71 Auto 7mpgMC9 8V71 4sp 7mpg96A3 6v92T 5spd 7-8mpg102C3 6V92T Auto 7mpg