Only 500 miles, but good mileage so far

Do people check their mileage manually, i.e. miles/gallons vs. assuming display is correct?


Posted via the PriusChat mobile app.

 

I can't speak for others, but I'm a bit CDO about fuel economy so I reset my "Trip B" odometer at each fill-up after noting the fuel economy and distance reported for the previous tank, and I enter those along with the actual litres pumped into a spreadsheet. So I have an excellent record of actual and reported fuel economy for the past 2+ years that I've owned the car.

 

Wow I love the MPG you guys are getting....I average 44 MPG each month as I drive four miles to work each day and back.....very little freeway driving...I have tires rotated as needed....my percent electric is 30...I use regular gas.

 

From what I've read, and my own limited experience, the display mpg is exaggerated. I think it is currently ~2 mpg higher than actual for the time I've owned the car (I reset trip meter B when I bought the car and haven't touched it since).


I fill the tank each time, note the total mileage at each fuel-up, and divide elapsed miles by gallons purchased.

I used to do this by hand on older cars, now I use Fuelly's gastracker+ app on my phone.

 

Same here with my Prius c. It reads 3 mpg over the actual. I have now owned it for 5 months, and it has been perfect, best vehicle ever for me.

 

Here in Canada the display shows fuel economy using the Metric standard of litres consumed per 100 kilometers traveled (l/100km). By that measure too, the car is about 5 to 7% optimistic - when it shows 4 l/100km the car actually consumed about 4.2 l /100km as measured by fuel pumped into the tank.

 

My 2010, if it reads 4.5, calculated will be 4.8 or 4.9.

 

G'day,
It's not related to Coriolis effect (affecting petrol/gas swirling in the car's tank) as I get the same slightly optimistic result reported by the car here in Oz.
I'm curious to see how much petrol consumption may increase in my five-months-old Prius 'c' as we come into winter here.
Well, what we call 'winter', in deference to the Canadians on PruisChat.
David S.

 

I am now getting 47.5 MPG...much better then colder months......I drive three miles to work....smile

 

Gasoholic how many miles on your car? I also just got a 2016 C and was getting in the low 50's today on my maiden trips. I wasn't sure was that the avg for the tank or the trip because it constantly adjusted itself.

 

G'day rowekmr,
Which 'Trip' setting are you using when comparing your fuel consumption?

On my Oz 2016 'c', Trip A and Trip B display the usage since the particular Trip was re-set to zero. I use (reset to 0) Trip A for a country drive and Trip B for each tank-fill.

My 'c's ODO gives a 'running average' of the last 5(?) minutes consumption reading while the car is being driven, so varies quite lot, particularly in a hilly area with high-usage uphill and low usage downhill.
The 'from start' first km (or mile) can be pretty high as the car is warming up the ICE, for example, but then quickly drops as the electrics take over more of the propulsion. Bit like using the 'choke' on an old fashioned car when starting the engine until it's warmed up?

After turning off the car (pushing the 'POWER' button), a consumption display for the travel from last Power-on to Power-off is displayed for a short while.

The North American 'c's may be different as you seem to have more models.

David S.

 

Yes, the fuel economy display shows the average for all of the driving since the last "reset" for whichever "trip" you're currently displaying. You reset the value for Trip A or Trip B by holding down the Trip button on the steering wheel while the information for that trip is being displayed. If you hold down the Trip button while the "Odometer" is displayed then it switches the speedometer display between km/h and MPH.

But are you sure about what the "odometer" display is showing you? Because when the display is set to show the odometer, my 2012 Prius C shows "from start" and displays the average fuel consumption from the time that you turned the car on, not for the last 5 minutes.

I reset my "Trip A" display each day to show the total distance and average fuel consumption for each outing I make, even if that outing means turning the car off while I'm in a store or out doing some activity. And I reset my "Trip B" display at each fill-up so I can see what the average fuel economy and distance was for the last tank of gas. Comparing the latter to the fuel economy measured by actual litres pumped usually shows that the display is a little optimistic (i.e., reports better fuel economy) than the actual value I get via the pump measurement. The display value usually show about 5% better fuel economy than I actually get.

I'm a bit CDO about fuel economy, so I actually record all this info in a spreadsheet - thus I can easily tell what my lifetime fuel economy is from the spreadsheet without needing to record it in one of the "Trip" displays. So far my lifetime actual fuel economy (as measured at the pump) is 4.35 l/100km (about 54 miles per US gallon).

 

G'day Sean Nelson,

You're right about the ODO display - it simply displays the fuel consumption 'from start' until the car is turned off. It then begins again from 0 when the car is started again. It's non-cumulative, whereas Trip A and Trip B are cumulative until re-set.
(The '5 minute' display is part of the 'fuel consumption screen' - sorry for my confusion. That screen's on p107 of my car's manual which says this is one of the displays turned off by default - p109 to turn them on, which I haven't.)

David S.

 

Ah, yes - that's the bar graph showing average fuel consumption over each 5-minute interval for the last half hour(?) or so. When you have that screen selected the 5-minute intervals show the same values no matter what you've selected (Odo/Trip 1/Trip 2) in the top portion of the display.

 

Bought the 2017 c two last week, had to fill up when I had one bar left on the gas gauge. I went 400+ miles, 56 MPG avg from 1 mile. Filled up the tank with $22... :-O gas was 2.99 in socal

 

Hah, only $1.29.9 (can) up here. Per litre.

 

A 4th generation Prius 2016+ can at best do 60mpg on a tank of gas. There are people who drive down mountain passes or hills for hundreds of miles that I am sure can get well over 60mpg on such a trip. For real world in city/highway everyday driving on non mountainous terrain, 60mpg is the best you can hope for. Summer driving means 10% better fuel economy because there is no ethanol in the gas until Nov. 1st.

I can consistently do 58-59mpg without much effort or trouble on a tank of gas. Your tank should go between 500-580 miles. Unless you like to live dangerous and carry a gallon of petrol with you. Trust the Prius computer it gives you an extra 10-20 miles beyond what the trip computer says you have left.

If people see it differently. Please post two or three tanks and the range you have on your trip computer proving otherwise. It's best to have your auto air set to 67-68F in eco mode. These are pro tips. I keep one of the trip computers that will show over 1000 miles and the average MPG. Those kinds of screen shots show real world MPG. Anything over 2000 miles with MPG is another good indicator of real world MPG.