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## Re: 300 miles 70 mph 30 mpg :)

 To: Mark Jurras Re: 300 miles 70 mph 30 mpg :) "U. Goettsch" Wed, 20 Dec 1995 09:33:18 -0800 (PST)
 ```On Wed, 20 Dec 1995, Mark Jurras wrote: > Or so you thought. This morning the daily lab discussion was about > overdrive equiped cars. The question is: if you drive a car at 45 MPH > in 4th no O/D and calculate the Mileage then drive the same course and > conditions at the same RPM in 4th + O/D and calculate the Mileage, > which is better 45 no O/D or faster with O/D. > > - -Mark "O/D or not O/D that is the question" Jurras Every engine has a rpm range where it is most efficient. I don't know what that range is on a B engine, and I don't know the rpm that 45mph would correspond to. Especially if your test track involves some slopes, no OD might be better, because I think I remember reading that higher rpm/lower load on the engine gives better mpg (within reason of course). Ulix "I'd pick the gear that SOUNDS better..." Goettsch __/__,__ ________/____,,_______ ................... (_o____o_) ..... (___ O _________ O ___/ .............. sprite caddy ```
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