Max Miles on First Pip?

I had my biggest first PIP right before my first gas gushing out of the gas tank on fill up incident.It was at 6,000 miles on my 07.

 

179 last week. I got scared, thought the gage was broken.

 

213 two tanks ago and again last fillup seven days ago. First time, probably overfilled. Last time, did second click and stopped. I'm guessing that if I stop on one click, I'll get a different figure based on how much fuel is in the tank and the mpg I'm getting to that point.
Average mpg has been 48-50. I also watch the intermediate pips down to 2, when I start hunting for a pump. Appears that each pip represents 30-35 mpg, although not completely consistent -- one pip lasted 40 miles.

 

I normally get 200-210 miles for the first pip. When filling, I add 1 gallon after the nozzle first clicks off. Never have overfilled doing this. I have been able to get in 1.5 gallons after the first click but then it did overfill, which is why I now stop at 1 gallon. Average mpg hovers at 50.

 

I always imagined (but never proved) that all the variation in bladder capacity would show up in the variation of the first pip. If that is the case, then the later pips should be much more consistent among tanks.

 

I only add after the first click if I plan on driving a long distance immediately.

 

A Priori, I think the question is entirely relevant. But if the data existed on how many gallons subsequent pips represent, then we could be pretty sure about whether the first pip variation is related to bladder stretch variation. As far as I know, we don't know. Merely an hypothesis.

 

My max was 230 something or could have been in the 40's. Don't quite remember, but I was shocked. Then after that, the pips started going down faster then the first and that sucked

Chau

 

How does the pump autoshutoff system work? Is it the same for every pump or do different gas stations have different levels?

 

The first pip has nothing to do with how you're driving the car. I've gotten 60mpg for my first 100 miles on a tank and the first pip still went away after about 75 miles. I'm currently at about 54 mpg for the tank and I'm at 3 pips, 350 miles.

 

The first pip on my current tank went away after about 110-120 miles. In those first 120 miles, I only started the car twice. Perhaps there's a connection. That, or long distances alone have a greater effect than how you actually drive the car. Heck, more than once I've seen a pip disappear while I was in a full glide. Another time when I was at a complete stop with no yellow arrows and the engine off. Darn thing has a mind of its own.

 

i normally get 150 miles for the 1st PIP.
can get to 250 miles in 3 PIPs.
then it deteriorates rapidly.

however, with the warm up in weather, last week i got to 350 miles @ half a tank based on PIPs. then pumped in 6.5 gallons at the gas station.

so it seems to be fairly accurate when the weather is warm...

 

I drove to upstate NY (Owego) to see my ailing mom for a month. I left her home on 5/11 at 5:45 am and the temp was 32 and only had 2 pip's left and also had my EBH on that night. Gas is high up here so I drove to Hallstead, PA to get some gas. When I got to the station my pip was blinking, I only put 7 gals in since the gas was 2.349 and I could make it where the gas was cheaper.

When I got down to 2 pips I reset my trip A to see how far I could go until my blinking pip started. I got to Raphine, VA and had 78.9 miles with no blinking pip so I figured I would stop at the Hess station to fill up (2.159). I pumped the gas very slow because I had that splash back happen to me when I got my car used in March 13th of this year when I tried to topped it off. It took 11.611 gals and I am sure it was completely filled with no splash back and the temp was 57. IMO if I drove until the blinking pip there would not be much gas left.

Now I had a full tank I wanted to see how far I could go on the 1st pip. I got 246.9 when I lost the 1st pip and I was at 60 MPG, it was real windy most all the way back to Kannapolis, NC. At the end of the month I will be moving back to NY to take care of mom for a extended period of time.

 

You can see a small hole at the front bottom side of the filler nozzle. When this gets covered with gas, the pressure changes inside the nozzle and shuts it off.

 

We are going to Savannah on Friday for the weekend, it's about 279 miles from home so I will get back to ya on what I got on that tank. At this ponit I am at 60 MPG. I feel I can do better than 60 if the weather and the wind hold up. The best MPG since I got my prius on march 13 was 67.1 Mpg, but this is the first time that I put that much gas in it so I feel that this will be a good indicator of my ture MPG since I put 11.611 gals in.