What is your DTE after fill-up? (Gen 5)

DTE is not real-time accurate. Not even close. It's a lagging indicator at best. It's calculations are based on tank capacity minus 2 gallons. If your driving style differs between tank to tank it will be wildly off.

The gold standard is still miles driven/fuel replaced.

Tank average is a better real-time indicator. My last tank was only .5 MPGs (manually calculated) from what my tank average meter stated (62.xx MPGs).

 

I'm not sure this is always correct. My last DTE was 474 miles with a 10.6 gallon tank. If I subtract 2 gallons, it would suggest the car is computing DTE based on 55 MPG which is way off what I have measured (miles/gallons added).

My miles/gallons added average is 44.7 MPG and the DTE / TotalTank (474 / 10.6) is also 44.7 MPG suggesting the DTE is using the entire tank (in the Prime XSE case). The car's indicated "Tank Average" remains stuck at 99.9 MPG though since that computation uses total miles driven not just HV miles.

I beg to differ - individual fill ups vary causing individual MPG values to vary quite a bit. My "minimum standard" is average over at least three fill ups.

 

With respect to 2023 LE's (11.3 gal capacity)...I refueled at 0 DTE. I had driven 600 miles, and put 9.7 gals in, at the same pump, using the exact same methodology as last time. Accuracy would be within a couple ounces (128 oz/gal).

That equals 1.6 gals left after DTE=0.

 

Agree to disagree then.

Same station, same pump, lowest auto-setting, no top-off = rounding error.

 

Agree with both. Miles driven vs fuel replaced is the only real way to calculate true MPG. The more fill ups tracked, the more accurate the measurement will be.

 

My avg. tank reading was .5 MPG's from my manually calculated fuel economy. One was slightly over 62 MPG's, the other slightly under.

I was just a bit over 65 MPGs before I parked my car for 2.5 hrs and used it as an air- conditioned dog kennel on a very warm day.

We are in the middle of one of the worst heat waves in modern history. I've been driving in temps that have reached 110F. The AC is on all the time.

My G4 would have been clocking mid-50's if I was lucky. It was particularly susceptible to heat and AC MPG penalty.

When the weather cools, and I can drive without AC, I'll hit 70 MPGs on a tank easy. And I'm accelerating with the traffic. No exotic maneuvers necessary. The G5 just glides on battery for days...

 

Why do you think your precisely measuring car would read less fuel used than was? I just don’t understand the theory behind that belief. Fuel is measured accurately in very tiny amounts into the cylinders. Suddenly they decide somewhere to fudge the numbers? I would much more disbelieve gas pumping and all that entails. It’s not easy to discuss because people get in a camp and stay there. Maybe I’m in a camp, but at least I am open to I could be.

 

Really? My 2023 Prius Prime XSE is spot on with the GPS speed of WAZE (and the stupid "Your Speed Is" sign I went by twice yesterday)

 

I used to watch for a mile marker , then try to go exactly sixty while looking at my watch second hand as the next mile marker went by. So it should be one minute.
What if a person set a trip to zero, went sixty, and timed it?

 

Are you serious or joking? I'm not very good at detecting sarcasm.

 

Are you sure it’s intentional by Toyota to deceive us? Maybe it’s unintentional. Which app is free you use? So this is better than my holding steady 60 and clock, odometer method? I want to try the app and see for myself.
One thing my old method is better for brain exercise than gps.