Accuracy of "Miles to Empty?"

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Old 11-29-2007 | 01:35 PM
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Burghman81's Avatar
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Accuracy of "Miles to Empty?"

Hello All.

I was wondering how accurate the "miles to empty" notation on the trip computer is? It always seems that when I fill the tank it takes far less than the maximum capacity. Is the miles to empty just how much is in there before going to reserve?

Can you drive it down to 0 miles to empty and still be safe?
Old 11-29-2007 | 01:42 PM
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more inaccurate than any other car on the market when it says 0, u really have 3 gallons left or 50 miles
Old 11-29-2007 | 01:50 PM
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I figured as much. Does your thermometer suck also? It always says that its like 10 degrees warmer outside than it really is.
Old 11-29-2007 | 02:00 PM
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From: N35°03'16.75", W 080°51'0.9"
TL is designed to be at ~3 Gallons of "reserve" gas when the Trip Computer says "0". Like Beats said, it is very consistent.

Look in your owners manual regarding the Temp Readout. It uses a goofy algorithm to set the temp - it is not a continous direct reading. Some have said the "true purpose" of the temp is so you know when the road temp is close to freezing and can adapt as needed for the possibilty of ice.
Old 11-29-2007 | 02:02 PM
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My "miles to empty" used to be 434 now for the past six months it has been 232 which is the right mileage that I have been getting out of a full tank.

My temp. sensor has already been changed by Acura twice, and it is still, sometimes, up to 17 degrees warmer than outside. Makes a big problem in winter when the temp outside is 50, the temp shows 67, and the I get AC with cold air instead of the heater.
Old 11-29-2007 | 03:07 PM
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Originally Posted by Tripnbeats
more inaccurate than any other car on the market when it says 0, u really have 3 gallons left or 50 miles
+1
Old 11-29-2007 | 03:23 PM
  #7  
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yea your supposed to be traveling a certain speed for the temp to actually begin to aquire in the computer.
Old 11-29-2007 | 03:28 PM
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[QUOTE=khiyal]My "miles to empty" used to be 434 now for the past six months it has been 232 which is the right mileage that I have been getting out of a full tank.
QUOTE]


also depends on how your driving u wanna hear vtec, driving in the city, out of the city... when I drive to NY or Fl im getting 31MPG at 80mph in cruise and it says >468 miles to go. I also have the AEM CAI and throttle body spacers. I thought it would give it less milage but it doesnt it keeps it really nice n high.
Old 11-29-2007 | 03:37 PM
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+1 = "TL is designed to be at ~3 Gallons of "reserve" gas when the Trip Computer says "0". Like Beats said, it is very consistent.

Look in your owners manual regarding the Temp Readout. It uses a goofy algorithm to set the temp - it is not a continous direct reading. Some have said the "true purpose" of the temp is so you know when the road temp is close to freezing and can adapt as needed for the possibilty of ice."

You can adjust that acuracyas well...
When you go into the Navi DIAG screens, you'll see the +40 mile buffer in the range screen. You can raise or lower that buffer and make it whatever you want.
Old 11-29-2007 | 03:38 PM
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i gotta me a navi!!!!! lol
Old 11-29-2007 | 04:24 PM
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06 Acura TL's Avatar
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i went 2 days with 0 miles left
Old 11-29-2007 | 05:50 PM
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It's safe to say one can run at least 50 miles after the fuel light is on ... on my type-s, that will show about 30 miles to ZERO ... I know that's a bit conservative cuz I've had it run over the nil limit a few times ...
Old 11-29-2007 | 06:01 PM
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From: N35°03'16.75", W 080°51'0.9"
Originally Posted by shooter
It's safe to say one can run at least 50 miles after the fuel light is on ... on my type-s, that will show about 30 miles to ZERO ... I know that's a bit conservative cuz I've had it run over the nil limit a few times ...
Fuel light comes on at approx ~25 or 30 miles to Zero.

AFTER Zero you can go an additional ~50 more miles (3 gallons).

So, from the time the fuel light comes on you can go ~75 - 100 miles (whatever you get on ~4 Gallons).


Past that, you're on your own .... walking. lol
Old 11-29-2007 | 06:37 PM
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speaking of which is anyone getting different readings on their trip computer in respects to their MPH? say you're going 65 on the tac, but your trip computer says 60?
Old 11-29-2007 | 06:42 PM
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From: N35°03'16.75", W 080°51'0.9"
^^


Trip computer is AVERAGE mph, not instant. So, yes, my actual mph is always different than the Trip Computer.
Old 12-05-2007 | 03:29 AM
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Yes, the TL does have a very conservative fuel gauge.

I have run it consistently 70 miles beyond when the yellow low fuel light comes on.

I'm not sure how far I've run consistently beyond the 0 miles left indicator; but I know that the yellow low fuel light comes on before there's 0 miles left.

Even when I have driven 70 miles past the Fuel Light, the most gas I have put in is 16.1 gallons (tank capacity is 17.5 per the owner's manual).
Old 12-05-2007 | 09:30 AM
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this has been talked about alot before. all the details above are true, however i would not recommend driving on that reserve fuel because it is old dirty fuel left over from all the times you have filled up. but hey, if you need to drive it'll still work.

just some tips i read somewhere while were on the subject of gas:

if you always fill your tank up when you get to a half a tank you get more mileage out of your gas because this is the point when some of the fuel becomes vapor.

never fill up when you see a fuel truck at the gas station because this is when they are refilling the gas tanks and chances are that you are going to get the "bottom of the barrel" as far as the quality of gas you'll get.

never fill up when it is hot outside because more of the gas will become vapor than if you fill up when its cold.

and finally when you are pumping gas and you set the handle to where it fills without you needing to hold it, always put it on the middle or lowest setting because less of the fuel turns into vapor. the faster you pump the more vapor which gets recycled back into the pump and you get less gas.

sorry got a little carried away haha , hope that helped though.
Old 12-05-2007 | 11:31 AM
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From: New York City | Stuck in Traffic
Originally Posted by 06 Acura TL
i went 2 days with 0 miles left
me too, then ran out of gas 100 yards away from the gas station
Old 12-05-2007 | 02:31 PM
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Hrm, from what a co-worker said (also a TL owner), when you run your car "dry" or close to dry, it'll get all the sediments into the engine. Could that be another reason why Acura has their "0 Miles" at 3 gallons?
Old 12-05-2007 | 02:37 PM
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Some have said the "true purpose" of the temp is so you know when the road temp is close to freezing and can adapt as needed for the possibilty of ice.[/QUOTE]BEARCAT94

I'm surprised you would remember that tidbit of information
Old 12-05-2007 | 03:31 PM
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My temp gauge is very accurate. normally within 1-2 degree F of all the bank billboard temps I go past anyways.
Old 12-05-2007 | 03:49 PM
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From: N35°03'16.75", W 080°51'0.9"
Originally Posted by S PAW 1
Originally Posted by BEARCAT94
Some have said the "true purpose" of the temp is so you know when the road temp is close to freezing and can adapt as needed for the possibilty of ice.
I'm surprised you would remember that tidbit of information


LOL. I think that's a compliment. I guess some of my "dumber" posts didn't surprise you? (j/k )

Did you say that? If not, I bet you knew it.

Makes sense to me given two facts:

- The sensor is in the lower part of the bumper - relativley close to the road;
- Calibration of the unit includes using Ice Water to set the readout to 32*.
Old 12-05-2007 | 08:16 PM
  #23  
Inaccurate's Avatar
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From: Houston, Texas
Fuel tank capacity observations (click here)

Are you worried to wait until the MID indicates "RANGE = 0" ??? (click here)


Outside Temperature Indicator Logic Explained (click here)


The A/C, the solar blocking glass, and the heater do
such a good job keeping the temperature of the
passenger’s compartment at a comfortable level that
it’s easy to lose track of just how hot or cold it really is
outside. An outside temperature indicator in the
gauge assembly gives you a reality check. But keep
in mind, this indicator isn’t a laboratory-grade
thermometer, and it might not show the same
temperature as you’d see on signs or buildings with
outside temp displays.
The outside air temperature sensor is mounted
behind the middle of the front bumper. The gauge
control module uses measurements from that sensor
to display the outside air temperature.
Because of where the sensor is mounted, it may be
affected by heat coming off the road, the engine, the
radiator, or even the exhaust pipes from other
vehicles. To minimize bogus readings, the gauge
control module follows a certain logic. Here’s how
that logic works:
When you turn the ignition switch to ON (II). . .
• If the engine coolant temperature is 139°F or
lower, the indicator shows the current outside air
temperature.
• If the engine coolant temperature is 140°F or
higher, the indicator shows the temperature that
was stored in memory when you turned the
ignition switch to LOCK (0), no matter what the
sensor behind the bumper currently measures.
The indicator doesn’t refresh until certain criteria are
met:
• If the measured outside air temperature is more
than the indicated temperature, the indicated
temperature rises 1°F every minute once the
vehicle reaches and maintains a speed of 19
mph or faster for at least 30 seconds. As long
as the vehicle speed doesn’t drop below that, the
indicator refreshes every 60 seconds until the
two temperatures match. If the vehicle speed
drops below 19 mph, the indicator doesn’t start to
refresh again until the vehicle speed climbs to 19
mph or faster for more than
90 seconds.
• If the measured outside air temperature is less
than the indicated temperature, the indicated
temperature drops 1°F every
2 seconds until the two temperatures match, no
matter what the vehicle speed is.
So here’s the bottom line: The outside temperature
indicator seldom delivers readings in real time
because of the many heat sources that could throw
off that indication.
Old 12-05-2007 | 08:22 PM
  #24  
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From: Albany, NY
When my light comes on, it takes about 13 gallons to fill. Since it's a 17 gallon tank there still should be at least another 60 miles for you to live on the edge before you start to worry.

My temp gauge seems to be pretty accurate measuring like geeky w the banks and stuff
Old 12-05-2007 | 11:33 PM
  #25  
scv76_'s Avatar
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From: So.Cal SCV
It's obvious that every car seems to report miles to empty differently
Here are the last few fill-ups in mine:

Mi 2 empty Light On Gals Pumped Distance Traveled MPH

??? Yes 15 318 26

27 No 14.1 324 27

???? No 13.6 305 25

37 No 14.22 325 28

40 Yes 14.0 326 27

62 No 14 295 26

91 No 13.1 310 28

I've been keeping track so that when I change to synthetics I will be able to tell if there is a difference in milage.
Just noticed the spacing didn't format properly.
There are 5 columns
Old 12-06-2007 | 02:03 AM
  #26  
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From: Tacoma, Washington
Originally Posted by Bearcat94
Fuel light comes on at approx ~25 or 30 miles to Zero.

AFTER Zero you can go an additional ~50 more miles (3 gallons).

So, from the time the fuel light comes on you can go ~75 - 100 miles (whatever you get on ~4 Gallons).


Past that, you're on your own .... walking. lol
Thanks for the info! WOW some of you guys are really brave I get scared when the gas light comes on in my ride. The hair on the back of my neck stands up and my butt clinches tight. I start turning off the heater/AC, radio, everything that drains power (probably not necessary i dunno). I just don't want people laughing and pointing at me saying "Hey look at the dude with a thirty thousand dollar plus car. He ran out of gas in the middle of the road!" .:gheylaugh: Especially if you have to get out and push or maybe make your wife push, but then again she might scratch the paint.(F*** it man I'll push) .
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