22.2 MPG going Uphill 4.7 Miles

op2:

 

Have you measured average MPG up and downhill yet?

 

Even better, on a steeper downhill regenerative braking will store a good portion of that downhill energy for later use. In a non-hybrid, it would just been burned off and wasted. So even after levelling off the hybrid will get some *free* mileage that a non-hybrid would not.

 

We live at sea level and every month or so go up Highway 26 for about 40 miles and get our spring water.

Elevation at max is 1640 feet. If I reset either trip A or B and
from a cold start when I reach the first pass which is about
1,500 feet my mpg gauge is reading about 38 mpg this is about
20 miles or so into the trip.

At the 1640 ft level about 10 miles away the mpg gauge will read
about 42-44 mpg. When we get to the spring water fountain
it will be about 45 mpg.

When we return back to sea level the MPG gauge will usually read
about 50-56 mpg depending on the weather conditions.

In summer it will be about 56 mpg, in winter 50 mpg or lower, calculated of course will be about 3.5 mpg less than indicated mpg.

 

What was your mileage going down hill in the Prius, around 70mpg?

 

I love the tongue firmly in cheek answer.

 

You were up on that hill for quite some time . Good to see newton's thoughts on energy are still holding true.

 

I just drove up a hill (2.7 miles @ 17% grade) and my scangauge was showing 6 - 10 mpg the whole way up. Worse still, going downhill on it (engine not fully warmed up, but above 159F when I started) B mode was limiting my MPG's to 50 MPG or so. Speed limit was 20 mph with many switchback turns.

 

(22+100)mpg/2 = est +61 mpg + a full battery

 

I think his screen display maxed out and his real mpg was higher than 99.9mpg.

 

Yeah, would need to reset the trip meter before the next round trip for an accurate(ish) round trip MPG.

 

You know better than that. 22 up and 100 down really averages out to 36 mpg roundtrip. Even in the more likely case that the downhill mpg was infinite, with the display capped at 100, the round trip can't be any better than 44 mpg.