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This is a discussion on How many gallons in a reserve tank when the last pip start blinking? within the Gen II Prius Fuel Economy forums, part of the Gen II (2004-2009) Toyota Prius Forums category; Hi, I'm the new owner of a pine silver mica prius 2008. I love driving my Prius so much better ...


How many gallons in a reserve tank when the last pip start blinking?

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Old 05-26-2008, 09:15 PM   #1
angeliz421
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Smile How many gallons in a reserve tank when the last pip start blinking?

Hi, I'm the new owner of a pine silver mica prius 2008. I love driving my Prius so much better than my Beemer. I need to know more about the holding tank? How many gallons left after the last pip start blinking? Much appreciate....thank you...
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Old 05-26-2008, 09:44 PM   #2
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

Zero gallons. In general, you don't want to go below three bars.
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Old 05-26-2008, 09:57 PM   #3
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

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Originally Posted by angeliz421 View Post
Hi, I'm the new owner of a pine silver mica prius 2008. I love driving my Prius so much better than my Beemer. I need to know more about the holding tank? How many gallons left after the last pip start blinking? Much appreciate....thank you...
Welcome and Congratulations on your new Prius.

The answer to your question is that it varies(A LOT). Around here we call the Fuel Gauge a "Guess Gauge".

There have been several posts about how many miles people got after it started blinking. Some got as much as 60-70 miles and others ran out of gas before it started blinking.

Many of us refill at 2-3 pips.

Try a search on Guess Guage.
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Old 05-26-2008, 10:14 PM   #4
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

I have made it a habit to refuel at 2 to 3 pips. Its less painful that way! ($)
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Old 05-26-2008, 10:23 PM   #5
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

i fill at 2-3, sometimes 4 if i'm going a long distance where there are who knows how many stations. I would recommend the same.
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Old 05-26-2008, 10:34 PM   #6
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

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Originally Posted by angeliz421 View Post
Hi, I'm the new owner of a pine silver mica prius 2008. I love driving my Prius so much better than my Beemer. I need to know more about the holding tank? How many gallons left after the last pip start blinking? Much appreciate....thank you...
I think the answer you are looking for is about 0.9 gallons. Don't plan on it carrying you much further then 10 miles. Best to fill up around 2 bars.
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Old 05-26-2008, 11:19 PM   #7
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

How many gallons in one of those pips? It may be non-linear. I was two pips down after the first 140 miles, and it took 2.2 gallons to fill to the auto-stop. That's 65 mpg vs 48 mpg on the readout. I concluded the Toyota dealer had filled the tank a bit further on delivery.
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Old 05-27-2008, 01:25 AM   #8
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

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It may be non-linear.
I think it is totally non-linear. It seems like the first couple of bars (when full) are weighted more heavily than the rest.

Like others have noted, I usually refill at 2 - 3 bars. There is no penalty for refilling early, but some bad things can happen if you run out.
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Old 05-27-2008, 01:39 AM   #9
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

I've driven 25 miles past the flashing pip. Guess I should stop. Most I've gotten in @ fillup is 9.05 gallons.
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Old 05-27-2008, 09:45 AM   #10
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Default Re: How many gallons in a reserve tank when the last pip start blinking?

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Originally Posted by angeliz421 View Post
... How many gallons left after the last pip start blinking? ...
It varies. The first time I drove to fuel exhaustion, I went 130 miles suggesting over 2 gallons. I've run out in as little as ~30 miles, about 1/2 gallon. But the most frequency has been in the 60-70 mile range, about 1.2 gallons. I carry a 1 gallon spare can when driving on "flash."

Bob Wilson
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