How many MPB (miles per bar)? - Page 3 - Toyota Yaris Forums

stripey · 04-02-2009, 05:36 PM

Between 60 and 90 on first bar, and between 190 and 260 for the fifth bar to disappear.
Agree that the later bars go quicker, especially the second-to-last, and I reckon that's been somewhat cynically designed in by Toyota to inflate the apparent fuel economy.

Yaris Hilton · 04-02-2009, 05:41 PM

I think that's simply a matter of a float hanging on a simple pivot. The geometry means the angle is going to change faster as it goes down, if the float arm is nearly level at the top.

stripey · 04-02-2009, 07:17 PM

Quote:

Originally Posted by Yaris Hilton

I think that's simply a matter of a float hanging on a simple pivot. The geometry means the angle is going to change faster as it goes down, if the float arm is nearly level at the top.

Sure, but it's not hard to work out an algorithm to allow for that and have a gauge that makes sense, surely?

Yaris Hilton · 04-03-2009, 11:01 PM

Not hard, but they probably never thought it important to do so. If lots of folks complain to the company, I'll bet they'll change it. I just learned how mine works and adapted.

RedRide · 07-12-2009, 06:36 PM

Quote:

Originally Posted by Yaris Hilton

I think that's simply a matter of a float hanging on a simple pivot. The geometry means the angle is going to change faster as it goes down, if the float arm is nearly level at the top.

Yaris Hilton is correct.

Every car I ever had seemed to hang forever at ther first "line" on the gas gauge and then, go down progressivly faster after that.

Gas gauges have always been just a rough estimate for how much gas you have.

voodoo22 · 04-04-2009, 11:18 AM

Quote:

Originally Posted by stripey

Between 60 and 90 on first bar, and between 190 and 260 for the fifth bar to disappear.
Agree that the later bars go quicker, especially the second-to-last, and I reckon that's been somewhat cynically designed in by Toyota to inflate the apparent fuel economy.

This isn't the case for our sedan. The first Bar usually takes the longest to go down, but sometimes we get more km's on the second to last bar, which is always the second longest to go down when consistent driving across an entire tank occurs.

I recently stopped keeping track of this, but for the months I did I found:

1st bar 120-160kms
2nd bar 80-115kms
3rd bar 90-115kms
4th bar 90-110kms
5th bar 110-130kms
6th bar 105-130kms
7th bar 110-140kms
8th bar 40-60kms before it starts flashing faster

I never get the high end of the range on every bar. I usually get 100-110kms on every bar except for the first and second last where I usually get 120-150kms and the total per tank is very close to or over 900kms when I fill up just under or over 40litres during summer driving, mostly hwy, getting stuck in few traffic jams and weather is good.

AlexNet0 · 04-04-2009, 12:32 AM

I usually get around 60-65 miles per bar, not calculating anything, just glancing at it with the trip meter set.

Bredayaris · 04-05-2009, 12:51 PM

I've done a personal record last time to ''get rid off'' my first bar: 112 miles.

scape · 07-12-2009, 12:19 PM

I don't understand why they chose 8 bars instead of 11? or atleast 10.. that way it could make a bit more sense to calculate what you have left. i think they made the first bar out of whack, even the first half, to help sell the car :D
"wow, 220 miles and still a half tank!?"
anyways, I hope the gas gauge isn't a cheap lever and bobber, it'd make more sense to use a pressure sensor.. no?

Yaris Hilton · 07-12-2009, 05:15 PM

Quote:

Originally Posted by scape

anyways, I hope the gas gauge isn't a cheap lever and bobber, it'd make more sense to use a pressure sensor.. no?

You've got to be kidding. Cheap rules.

NJBob · 07-12-2009, 12:29 PM

That first bar seems to vary depending on how much you fill up the filler pipe. You can pump an additional gallon or more. That's why some of us get 112 + - on the first bar. It's all been said on these past 48 posts. The gauges just can't be that precise. It's mostly up to the individual to control the variables.

TLyttle · 07-12-2009, 10:46 PM

Not every car I've owned had inaccurate gauges. I had a Morris Minor that was easy to get used to: Filler pipe full, gauge stayed still on full. Down a gallon, gauge bouncing around at full. Near empty, and you could see the float bouncing on the bottom as the fuel swished back and forth. When that gauge stopped moving, you were out of gas. Stupid me, I always thought that is how a fuel gauge was supposed to work!

ellenbetty · 07-15-2009, 05:49 PM

I never paid attention to how many miles per bar. Some of you must have a lot of free time on your hands.

I was taught that the gas gage averages out the bounces from the fuel tank floot to come up with what to display. Since the gas float bobs up and down with every bump and twist in the road it is impossible to build a 100% accurate fuel gage. The idea that the Yaris gas tank may not be square is something interesting to think about.

The first reason I learned not to top off you tank is gasoline expands as it's gets warm, and you can lose gasoline. I had that happen after parking my Gremlin on a hill. The second reason not to top off is that most gas pumps now have a vapor capture system. The vapor capture system will suck the extra gas out. So you are just wasting money if you top off.

Back when I had a 86 Horizon it's vapor recovery system failed around 50,000 miles. Over filling the tank? Maybe. But the problem was covered by warrenty and a new after market vapor system was installed by the dealer free of charge.

Yaris Hilton · 07-15-2009, 05:55 PM

The vapor recovery system is why Toyota warns us not to top off.

As a long time topper, I've had problems with expanding fuel overflowing as noted above, and leaks developing in filler hoses. Gas on the concrete floor of the garage fills the house with noxious fumes. My sister had her house burned when such fuel soaked into the garage floor was ignited by a hot pan of wood stove ashes her son set on it.

I no longer top up the tank. I run it in fast till it clicks off, wait a few seconds for the foam to settle, then start it back slowly till it clicks off once more. (Doesn't take more than 1/10 gallon or so extra.) Gives me a consistent enough point of reference for tracking mileage without risking overfilling problems.

04-04-2009, 12:32 AM	#7
AlexNet0 View User's Garage Drives: '07 Yaris 3dr Join Date: Nov 2008 Location: Rockland, ME Posts: 1,638	I usually get around 60-65 miles per bar, not calculating anything, just glancing at it with the trip meter set. __________________ ---------- MI-YW ----------

07-12-2009, 12:29 PM	#11
NJBob View User's Garage Drives: 2008 Yaris Liftback Join Date: Oct 2008 Location: South Jersey Posts: 444	That first bar seems to vary depending on how much you fill up the filler pipe. You can pump an additional gallon or more. That's why some of us get 112 + - on the first bar. It's all been said on these past 48 posts. The gauges just can't be that precise. It's mostly up to the individual to control the variables. __________________ \| \|

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04-02-2009, 05:36 PM	#1
stripey Pretty green Yaris Verso Drives: Toyota Yaris Verso Join Date: Mar 2009 Location: Shropshire, England Posts: 37	Between 60 and 90 on first bar, and between 190 and 260 for the fifth bar to disappear. Agree that the later bars go quicker, especially the second-to-last, and I reckon that's been somewhat cynically designed in by Toyota to inflate the apparent fuel economy.

04-02-2009, 05:41 PM	#2
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	I think that's simply a matter of a float hanging on a simple pivot. The geometry means the angle is going to change faster as it goes down, if the float arm is nearly level at the top.

04-03-2009, 11:01 PM	#4
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Not hard, but they probably never thought it important to do so. If lots of folks complain to the company, I'll bet they'll change it. I just learned how mine works and adapted.

04-05-2009, 12:51 PM	#8
Bredayaris Drives: Toyota Yaris 1.3 vvti cvt Join Date: May 2007 Location: Breda, The Netherlands Posts: 158	I've done a personal record last time to ''get rid off'' my first bar: 112 miles.

07-12-2009, 12:19 PM	#9
scape View User's Garage Drives: 2007 Yaris Hatchback Join Date: Jul 2007 Location: Beaufort, South Carolina Posts: 388	I don't understand why they chose 8 bars instead of 11? or atleast 10.. that way it could make a bit more sense to calculate what you have left. i think they made the first bar out of whack, even the first half, to help sell the car :D "wow, 220 miles and still a half tank!?" anyways, I hope the gas gauge isn't a cheap lever and bobber, it'd make more sense to use a pressure sensor.. no?

07-12-2009, 10:46 PM	#12
TLyttle Drives: 07 Yaris sedan Join Date: Jun 2007 Location: Keremeos BC Posts: 986	Not every car I've owned had inaccurate gauges. I had a Morris Minor that was easy to get used to: Filler pipe full, gauge stayed still on full. Down a gallon, gauge bouncing around at full. Near empty, and you could see the float bouncing on the bottom as the fuel swished back and forth. When that gauge stopped moving, you were out of gas. Stupid me, I always thought that is how a fuel gauge was supposed to work!

07-15-2009, 05:49 PM	#13
ellenbetty ellenbetty View User's Garage Drives: 2 2007 Yaris 3 door liftback Join Date: Nov 2008 Location: Stow Ohio Posts: 182	I never paid attention to how many miles per bar. Some of you must have a lot of free time on your hands. I was taught that the gas gage averages out the bounces from the fuel tank floot to come up with what to display. Since the gas float bobs up and down with every bump and twist in the road it is impossible to build a 100% accurate fuel gage. The idea that the Yaris gas tank may not be square is something interesting to think about. The first reason I learned not to top off you tank is gasoline expands as it's gets warm, and you can lose gasoline. I had that happen after parking my Gremlin on a hill. The second reason not to top off is that most gas pumps now have a vapor capture system. The vapor capture system will suck the extra gas out. So you are just wasting money if you top off. Back when I had a 86 Horizon it's vapor recovery system failed around 50,000 miles. Over filling the tank? Maybe. But the problem was covered by warrenty and a new after market vapor system was installed by the dealer free of charge.

07-15-2009, 05:55 PM	#14
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	The vapor recovery system is why Toyota warns us not to top off. As a long time topper, I've had problems with expanding fuel overflowing as noted above, and leaks developing in filler hoses. Gas on the concrete floor of the garage fills the house with noxious fumes. My sister had her house burned when such fuel soaked into the garage floor was ignited by a hot pan of wood stove ashes her son set on it. I no longer top up the tank. I run it in fast till it clicks off, wait a few seconds for the foam to settle, then start it back slowly till it clicks off once more. (Doesn't take more than 1/10 gallon or so extra.) Gives me a consistent enough point of reference for tracking mileage without risking overfilling problems.