Prius Eco first fill up

I only let my tank get that low one time. (My very first tank.)

I saw a solid yellow "gas pump" light up, on the upper screen. It just stayed there until I refueled. I think there was a little less than one bar remaining on the gas gauge? I also heard a "ding", and a message popped up on the big black screen: "Low fuel. Would you like directions to a gas station?" That's a nice feature.

It was interesting to see how far I could go on a tank. One time is enough. Now I never let my gas get below 1/2 full.

 

8.5% diff is a bit more than the 5% some 4th gen owners are reporting. This could be due to the car delivered a little shy of full, different than the technique you're using at fill up.

 

Gary, maybe Kevin (krmcg) will add his comments here. He has a lot of expertise and experience with this.

He posted good information in the Gen4 gas mileage threads.

 

Are we believing the GAS PUMP is reading correctly the pump could be off , in the stations favor of course

 

My last car, a FORD, would change the l/100km display (or whatever default I had) to "km to empty" display when it went below 100km, and give a beep - you could change it back, but it would revert back every time you started the car. As far as I found out, it didn't have a low fuel light. What did your "km to empty" read at the time?

With my previous cars, (which needed filling more regularly), I'd try as much as possible to always fill up at the same pump, same fuel station, which gave me a better chance of consistent measurements. I'd only fill till first click too - which is very variable with different pumps.

Many years ago, I queried why a car I had would take at least 1½+ gallons more than the specification, and was told that they take what a typical person would squeeze into the tank, assuming that it had an operating reserve to start with and stops at the first click. Some cars are almost full at first click, yet others will take a dribble for 10 mins before finally full.

 

Do you guys always pull the nozzle out when the pump clicks off? I can get about $2 more in there after it stops.

 

I now always stop at the first click. Going for consistency from tank to tank.

 

I can squeeze nearly another whole gallon in there (depending on price.) That's another 60 miles? It will be my "emergency reserve."

(But I never let my car get that low. I don't like the feeling of being near empty. I guess I'm the only Prius owner that fills up when it gets down to 1/2. )

 

I fuel up to the first click, note how many L and then do 3 clicks again and stop there. The difference is typically a little less than a L like on the Gen3 I had.
Air from bubbles pumping quickly and vapor recuperation will add to the error. Which now after a few tanks, is hovering around 4-5% instead of the 6-6.5% I had with the Gen3. So it seems that the MFD is 1-2% more accurate.

 

I like to squeeze every ounce of that new Mobil "Synergy" fuel into my tank.

(and keep water bottle handy to wash fender, for when it overflows.)

 

Good thing you keep that car well waxed...

 

Well, it's only overflowed two times.

Yup. I even wax inside the fuel filler compartment. Don't want any of those Mobil Synergy "Marked Molecules" damaging the paint.