I assure you it happens that way. That would be childish math and Toyota wouldn't be using that formula lol. The DTE is an estimate based on prior MPG earned. The average tank is a calculation based on miles driven vs. "fuel burned". Now how they come up with fuel burned is anybody's guess. Or maybe they explain it somewhere. I'm not interested in finding the answer because I know how accurate it is - and has been through several refuels.
OK, thanks. So I don't know, it is possible I have done "update" on the trip info screen. If you know, is there a way to see the underlying data for the total average? So, for example, I have just over 2,100 miles on the car. Is there a way for me to see if the "trip average" (which thanks to this thread I can now get to) is calculated over some lesser number of miles? Which would be the case, I guess, if I did the "update" on the trip information. Seems like being able to see the total miles that the total average has been calculate upon, and some of the other inputs to produce the trip average number, would be good to have.
I'm not saying Toyota does it that way, I'm saying you're doing it that way if you're resetting the total average every day to give you a daily mpg, then averaging those daily mpgs together to get an overall average. I'm just going off of what you said in your earlier post. I suggested you leave the total average alone for a longer period(month+) to get a true overall average. You said you liked using the feature to get a daily average instead and didn't plan to change. You then said you've averaged 69mpg using that method. But if there are significant differences in the number of miles driven from day to day, then that 69 mpg overall average is suspect. It might be accurate, it might not. Unless you also noted the miles driven each day, there's no way to know for certain.
I take a photo when I turn the car off if I want to record individual trips. I take a photo of the trip info/history for round trip/daily MPG data.
I said nothing of the sort. I do not average any of the trip MPG gauges manually. If I want to look at what my MPG average was for an entire day of trips, then I look at the trip info/history. I never said I average a bunch of them together lol. I also referenced the tank average when quoting the 69 MPG number. My math and methodology is sound my friend. I assure you.
"No, I won't be changing my habits. There's nothing else to find out. I use the trip/history function as a daily MPG gauge. The engine off trip summary for individual trips. And the tank gauge for tanks. I've got everything just the way I like. I'm currently averaging around 69 MPGs on this tank. And I've demonstrated that gauge to be accurate within .5 MPGs." Here you go. Read again. Trip/history for daily MPGs. Engine off trip for individual trip. Tank for tank MPG (AKA average total MPG since refill).
My bad. I focused on the two sections I bolded and must have skimmed past the underlined section. That's why I thought you were saying you were averaging your daily mpg to get the 69mpg. So you know your trip, daily, and tank averages to a high degree of accuracy, but your overall(lifetime) average is a little more nebulous unless you're tracking each fill-up's milage and gallons separately so you can average them all together. Or you're always filling up at about the same fuel level(like 1/4 tank left). Honestly, I don't care that much. I'm just trying to head off the next "the 2023 Prius sucks because I'm jumping to conclusions based on bad/incomplete info." I'm getting as tired of them as you are.
He's 0 for 100 on his attempts. It's actually starting to get interesting seeing just how long his streak will stay intact. Yeah, my lifetime average is recorded from fill-ups. Manual calculation, same pump, same method of filling, etc.
It is convenient to call others a troll, when you are the one who has been posting bogus numbers throughout this thread and rejecting any criticism. Toyota explicitly states this in the manual: "Use the displayed fuel consumption as a reference only." The numbers you have been posting in this thread have been consistently 20–60% higher than the EPA value of 57 mpg, and you are not even hypermiling. This is plain nonsense, and it is why I questioned your numbers. I was trying to find out your actual fuel economy, which is manually calculated and not read through the car's highly inaccurate fuel-economy display, and yesterday you finally stated that it was ~ 60 mpg. (You said that your last manually calculated tank was 61 mpg, and the previous tanks were slightly lower, so they probably average to 60 mpg if not lower.) Now, this is only 5% higher than the EPA number, which is quite reasonable for nonhypermiler. So, why are you still arguing and name-calling?? You are the one who stated your manually calculated fuel economy. People read this forum to be informed, not to read nonsense and incorrect information. Even 69 mpg on your current tank-average display is 15% higher than your actual manually calculated 60-mpg lifetime average, and you have been claiming 70, 80, and even 90 mpg in some of your posts. This type of hogwash is not only utterly ridiculous, but it irritates and wastes times of others. I am a hypermiler who knows very well how the fuel consumption in Prius works, and the Gen 4 engine and hybrid system, despite being less powerful, is very similar to Gen 5's, and the cars also have similar aerodynamics if my Gen 4 Prime's is not slightly better; so, you are not going to be able to fool me with your nonsense. PS: I will very likely trade in my Gen 4 Prius Prime for a Gen 5 Prius Prime in a year or two; so, it is also utter nonsense to claim that I am running a Gen-5-bashing/smearing campaign for my future car.
Yikes! Somebody must have just learned that the G5 Prius smashed the IIHS safety ratings out of the park. "Toyota’s Prius is among the quickest, best-looking, and most reliable vehicle in its class. The Prius is also the vehicle the least expensive to fuel in many parts of America. Now the Prius can also claim that no vehicle has a higher safety rating." Why did they have to say "best looking"??? That's just adding insult to injury.
You've twisted every single comment I've made. Just a garden variety troll.. or worse. Go away already lol. "I am a hypermiler who knows very well..." You don't know anything. Just the other day you were trying to state that hot summer months is where the real fuel efficiency is at. I'm starting to wonder if you even own a Prius. You probably drive a bicycle.
OK, @Preebee, Every seasoned poster on PriusChat knows that fuel economy gets better in warm weather due to reduced air density and humidity, which decreases the aerodynamic drag. You have known exactly what your manually calculated fuel economy is, which is ~ 60 mpg; yet, to this date, you keep posting display readings that range between 70–90+ mpg.
Okay Gokhan the Troll, Not running air-conditioning it doesn't. I've only had a couple fill-ups since buying the car. I've stated clearly that my use of the car since purchase has not been 100% efficient. I've stated that I've even idled my car for hours in blazing hot temps with AC on for my pooch. Even with this kind of use, and the car not even broken in, I'm beating the EPA by 4 MPGs. I'm currently at 69 MPGs tank average and I will absolutely get 680ish miles on this tank IF I don't have any long idling or severely hot days (which are forecast to return). I previously drove a G4 LE and got 650+ mile tanks without even trying (no AC). I will get AT LEAST 700 miles on a G5 tank in nice weather and no idling. I stand behind every screenshot I've posted on here. You are the only one complaining. Now go get your shinebox kid. Or go tighten the chain on your hypermiling bicycle.
@Preebee, no one is interested in knowing what mpg you think you will obtain in the future, and you have been told many times that the display fuel-economy readings, especially the trip average and total average, are next to useless. The situation is made worse if you cherry-pick them, which is what you have been doing. Modern engines hardly require a break-in, and the fuel economy hardly improves after the initial drive fresh out of the factory. Cold and humid weather has a much more negative impact on the fuel economy than running the A/C. Most people run their A/C all the time. You said that you manually calculated 61 mpg or less for your last three tanks (perhaps as little as 57 mpg or less), and this is all the information we were interested in. Constantly posting trip-fuel-economy displays is silly, especially knowing that they are grossly inaccurate because they are not backed by your manually calculated fuel economy and they have been sometimes 60% or more higher than the EPA values and your manually calculated values. Everyone knows that Prius—regardless of generation—is very efficient, but no one is interested in misrepresented fuel-economy numbers.
The bottom line here is that—after all this fuss—his real, gas-station-pump-calculated fuel economy so far is ~ 60 mpg. We will see his future gas-station-pump-calculated mpg values. A 60-mpg manually calculated value is inline with what everyone else has been reporting here for their Gen 5 LE. My pump-calculated fuel economy is around 68–70 mpg with my Gen 4 Prius Prime after subtracting the BEV miles, which is tricky. I do about one full charge a week or perhaps a little less, and I get around 85 mpg if I don't subtract that from my ~ 180-mile-a-week driving. Most of my driving is at 57 mph on the speedometer. I do hypermile to some extent; so, Gen 5 Prius LE seems to get similar mpg as my Gen 4 Prius Prime if not perhaps a little less. This is all I wanted to know—not the anecdotal mpg records people have been achieving. I have real 50-mile round-trip mpg records of 125 mpg without depleting the battery SOC with my Gen 4 Prius Prime, and go ahead and anecdotally beat them if you can. Gen 5 Prius Prime SE will probably get somewhat less mpg. I won't downgrade to a non-plug-in car; so, I will have to live with that when I eventually trade in in a couple of years. By the way, I think the error in my Gen 4 Prius Prime display is not as big as I thought. It is perhaps no more than 2% rather than 5 mpg as I thought before. I should also check my odometer calibration. I am guessing it is quite accurate though, as the deliberate 2-mph speedometer overestimation error does not vary with speed. Here is what may be going wrong with the car computer. On top of this, add algorithmic errors by Toyota (remember that this is the first model-redesign year and there will be a lot of bugs throughout the car) and cherry-picking by the hypermiling driver. Why your trip computer isn’t giving accurate mpg readings
The Fuelly curve will smooth out over time. Depending on the trim mix of its population of users, I expect the 2023 average to be a little better than the gen4s.
