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post #1 of 27 (permalink) Old 05-04-2012, 12:06 AM Thread Starter
turnseven
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Gas Tank Capacity

Not sure if this is the proper forum or not but......

I have a new 2012 Skyactive and have a question about the gas tank capacity. The manual says 14.5 gallons (and I can find nothing anywhere to contradict that) It appears to me though that its a 12 gallon tank! Starting from a full tank it will empty normally and the low fuel warning will come on at 50 miles to empty. Today I ran it down to 5 miles to empty and filled it back up. It took 12.09 gallons. This is typical of the 10 or so times I have filled it. Other than the apparent decreased size of the tank the fuel gauge seems to be working fine. It is linear and pretty accurate.

Any thoughts?
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post #2 of 27 (permalink) Old 05-04-2012, 12:17 AM
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You have a reserve tank of 2.5 gallons the purpose of this is so you don't wear down the fuel pump and less likely to run out of fuel!

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Last edited by Frnchplayr15; 05-10-2012 at 01:02 PM.
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post #3 of 27 (permalink) Old 05-04-2012, 12:50 AM Thread Starter
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Thanks!

I searched the forums and found an older thread that lead me to believe that was the case. I'll try not to go on a rant about incomplete instrumentation but I would really prefer to know EXACTLY how much fuel is in the tank!
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post #4 of 27 (permalink) Old 05-09-2012, 06:37 PM
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I agree. I'm finding that the 2011 M3 I recently bought has about 3 gallons left in the tank when I stop to fill it, when the remaining mileage is about at 0.
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post #5 of 27 (permalink) Old 05-10-2012, 11:40 AM
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Quote:
Originally Posted by turnseven View Post
Thanks!

I searched the forums and found an older thread that lead me to believe that was the case. I'll try not to go on a rant about incomplete instrumentation but I would really prefer to know EXACTLY how much fuel is in the tank!
You AR better off as it is now, why risk your fuel pump or trying to press your luck on running out of gas as you drive into the gas station?

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I agree. I'm finding that the 2011 M3 I recently bought has about 3 gallons left in the tank when I stop to fill it, when the remaining mileage is about at 0.
As Frnchplyr15 said its so you don't run out of gas.

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post #6 of 27 (permalink) Old 05-10-2012, 11:47 AM
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My gas light came on with about 60 miles to empty today, so I got gas. The pump clicked off at ~12.5 gallons, but I was able to get 14.2 in (just pumping slowly) before I voluntarily stopped for fear that I was somehow overfilling it...
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post #7 of 27 (permalink) Old 05-10-2012, 12:51 PM
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You were over-filling it, and it can damage the charcoal canister which is part of the fuel system. Best practice is fill it until the pump clicks off, squeeze the pump once more until it clicks off, then stop.

If the charcoal canister becomes saturated and is damaged as a result, it can cause reduced mileage and performance. Problems often show up in cruise when the evaporative system attempts to purge the canister of stored fuel vapors, which is its purpose, to store fuel vapors, not liquid fuel.

Last edited by Westone; 05-10-2012 at 01:00 PM.
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post #8 of 27 (permalink) Old 05-10-2012, 01:05 PM
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Quote:
Originally Posted by outtaLuck View Post
My gas light came on with about 60 miles to empty today, so I got gas. The pump clicked off at ~12.5 gallons, but I was able to get 14.2 in (just pumping slowly) before I voluntarily stopped for fear that I was somehow overfilling it...
Holy crap man thats way too much why would fill it up an extra 2 gallons! You do realize that when you fill it up the gas in the tank expands which can lead to cracks or even severe damage to your tank! I mean filling maybe half a gallon is still a lil worry some but do able but 2!!!!

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post #9 of 27 (permalink) Old 05-10-2012, 01:07 PM
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Quote:
Originally Posted by Westone View Post
You were over-filling it, and it can damage the charcoal canister which is part of the fuel system. Best practice is fill it until the pump clicks off, squeeze the pump once more until it clicks off, then stop.

If the charcoal canister becomes saturated and is damaged as a result, it can cause reduced mileage and performance. Problems often show up in cruise when the evaporative system attempts to purge the canister of stored fuel vapors, which is its purpose, to store fuel vapors, not liquid fuel.
Westone hit it on the nose. That is also a safety shutoff at fuel pumps as to reduce the likely hood of spilling flammable gasoline on the ground in any significant amount. What was the motivation for continuing to fill past the safety shutoff anyways?

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post #10 of 27 (permalink) Old 05-10-2012, 01:13 PM
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Quote:
Originally Posted by LiquidM3SGT View Post
What was the motivation for continuing to fill past the safety shutoff anyways?
To have more miles before that first bar hits probably lol
Quote:
Originally Posted by Westone View Post
You were over-filling it, and it can damage the charcoal canister which is part of the fuel system. Best practice is fill it until the pump clicks off, squeeze the pump once more until it clicks off, then stop.

If the charcoal canister becomes saturated and is damaged as a result, it can cause reduced mileage and performance. Problems often show up in cruise when the evaporative system attempts to purge the canister of stored fuel vapors, which is its purpose, to store fuel vapors, not liquid fuel.
+1

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