03-05-2007, 09:52 PM
When reaching and achieving great MPG at what speed/average are you traveling at?
My scion does a lot better around 35-40 MPH ( around town speed). The higher I go the rpms go way up. At 60MPH the rpms are just at 3000 ( This speed on the NJ Parkway)
03-05-2007, 10:03 PM
Yea, I stay in the 30-40 range as much as possible. Perhaps I could do better going slower, but it's just too slow to be practical or safe where I live.
___The Insight on a perfectly flat and smooth road in fifth during the summer would hold 130 + mpg’s at 32 - 35 mph just above idle. Any undulation blows it out however. The Accord w/ Auto, 48 - 51 mph will allow 50 mpg on the same road in the same conditions. Ranger, fifth at 42 - 44 mph will allow 42 mpg’s. Cold temps, wind from anything but the perfect tail wind or poor road conditions kick those numbers in the teeth :(
03-06-2007, 10:05 AM
The "sweet spot" in a Prius isn't so much a speed as a set of conditions that allows for continuous transitioning between ICE power and a glide (P&G). Anything below 40mph is best, anything below 55mph is OK. Above 55mph aerodynamics start to get in the way, making the engine work outside of its most efficient band when climbing and preventing a satisfactory glide on anything but a fairly steep hill or with a stiff tail wind.
03-06-2007, 08:33 PM
40 with the TCC locked, 25-27 without it...but as Wayne noted, any undulation will blow it out, so I usually need to DWL at higher speeds so I'm hitting crests at the sweet spots instead.
My car will do about 55-60 MPG at 40 MPH on a good day with the TCC locked on a flat road, but there aren't many flat roads in my area.