2010 MPG Stats - Post Them Here

First tank

477.0 miles, filled with 8.4 gallons = 56.7 mpg (display = 59.0)

Commute is 85% highway, 15% surface streets. Twice this week, I drove to work in the rain and watched my overall MPG's drop. Morning temperatures varied (ranging from 44F to 52F). Did some short trips around town yesterday that took me from 59.9 displayed to 59.0 this morning, so I didn't get my "60 mpg" tank. Ce est la vie.

I did pump up the tires from 35 psi all the way around to 44 in front and 42 in back (then the rain hit).

Still, very good tank. My Integra was averaging 38 mpg for this commute (and likely 37+ given the conditions), so a nice ~20 mpg boost.

 

I had a short 71.2 yesterday after filling up and heading to work about 6.5 miles away. Electric and coasting for the last mile and a half.

 

once again the weather is a huge factor. was getting around 54 mpg on tank, but temps dropped from the mid 50's to the low 40's and tank average dropped to just over 50 mpg all in the last 150 miles

 

just returned from DC 820 miles trip avg to 56.2 and mostly on highway ...cool.

 

You asked for it... 371.9 mi. added 9.024 gallons = 41.2 mpg. Cold weather (as in high 30s to 40s to low 50s F). Lots of stop and go. The estimate was 42.8 mpg which is only 1.6 mpg higher after 371.9 mi. (This was my second tank since new.) The computers full tank estimate of 535 miles is a lame meaningless programming feature mistake imho. Now if one could manually set the previous tanks miles driven to (in my case) 371 miles it would be something meaningful to follow.

 

I have averaged 64 mpg since last July, and it’s nice to see the return of warmer weather and better mileage opportunities.
This car has been an interesting educational experience – I hope the reliability and performance are sustainable over the 20 year period we usually retain vehicles. The Prius doesn’t do everything best, but it’s been a fine addition to the family fleet.
Thank you Toyota and Prius Chat community!

 

Seventh tank. 45.5MPG (Calculated) 46.0MPG Indicated. Warm spring weather 50-80F.

 

After my 1st month and after 2000Km with the my new toy, I report 64.9 MPG calculated over both city & Highway trips, I can not recall what is the value shown on the trip computer...

 

I am averaging 49.3 MPG in the Eco mode. I am very happy.

 

Just picked up my 10 Model 2 last Friday, and still burning the dealer's gas

What I'm wondering is if anyone here has worked out any algorithm for calculating elevation gain/loss? Specifically, my situation is that I live in a mountain valley that requires me to transit a ridge to get into town. Sooo...., I'm living at 2000 feet, my city is at 1000 feet, and the intervening terrain is such that I must go down to about 1800 feet, then cross a 2000 foot ridge to get to the downhill into town.

I've been playing with the displayed info, trying to minimize my gas usage (can't help it coming home - gotta climb a 1000 foot ridge) and use the techniques I've read about here to maximize my downhill glides, coasts, etc. It's easy to see the trip mileage indicator change: when I go home (up the mountain), I lose from whatever I've been able to get in town (usually around 52.5) to a much worse number (usually around 50.5), but then I get some back coming down the grade I've just climbed.

On my first tank, I seem to be averaging around 51 and change, at least according to the indicators. What really interests me is if anyone has done any empirical calculations about how terrain affects things? For example, it should be possible to calculate the amount of energy required to raise a 3100 lb. vehicle up a 1000 foot grade, the efficiency ratio (optimum) of the energy use/storage mechanisms involved with our wonderful machines, and the impact of driver "error" from the ideal technique. This is something I will be thinking about going forward.

Great site, thanks!

 

Gmaps Pedometer

 

I'm getting an average of 50 mpg by how much fuel i use for km driven
Is there a way to read the avg on the trip meter and special section if so can someone explain it to me.
2010 gen iii/iv

 

It's a little difficult to rank factors because one cannot necessarily isolate the factors, but from my experience I would rank the following as the most NEGATIVE factors:
1) Very short daily commutes
2) Very cold temperatures, snow, or heavy rain
3) Stop-and-go traffic
4) Hilly terrain
5) High speed

I am not ranking driving technique because I can compare only those factors that effect mileage when I am driving. I practice various techniques and try my best all the time to maximize gas mileage without slowing down to the point of annoying the people behind me but I know no matter what techniques I use, if any or all of the above factors apply, I am not going to get decent gas mileage.

Why I consider very short commutes the number one negative factor is that one will never be able to achieve decent gas mileage if the engine doesn't have a chance to warm up. However, on a long drive, even at 60 or 70 mph, I can get decent mileage (45-55) even though I could probably get better if my average speed was lower than 60.

 

I also have altitude as a big factor in my commute. In the 17 mile commute down 1600' in elevation into town, I get up to 90 mpg. When I get home it only reads tops of 56 mpg.

Very frustrating

Chris

 

First tank : 4.56 Liters/100k : 61.98 m/g Imp : 51.61 m/g U.S.

Not to bad a start

Dan

 

:welcome:

following is a copy of my post.

When we drive downhill, we have the extra 106 mL of gasoline energy to a goal 100m below starting point.

The Gen3 Prius is more efficient, therefore I think 100mL/100m will be the number.
I'll try to get the number on my Gen3 in the near future.

Ken@Japan

 

First tank very consistent 45mpg. I guess I'm OK with it since it's new, not broken in, and we were still on Winter formula gas (I think). This is based on 25 mile commute, no traffic, little bit of a hill, conservative driver (my wife).

Time will tell, but it's definitely worse than my '08 with 18K miles on it (when it was stock, unmodified).

But we leased it because it was a cool looking car that gets 45-50mpg for $200/month.

 

I average 4.4l/100km (53 mpg?) Have 20,000 km (12,427 miles?) on the car.

 

Thanks much for the thread link. Good info there. Still on first tank, but I seem to get back a good bit of what I put in to climbing the hills when I go down them. I wonder how people do who live and drive only at sea level?

 

For the first time since getting the car in January, I have actually met the manufacturer's claimed consumption figures - an average of 72mpg (UK gallons unfortunately!) over my 23 mile commute. I was really surprised as traffic was extremely heavy, stop start in places with some steep gradients. Average speed was 37mph. Previous best was 62mpg on the last tankful actually... Superb!:clap2: