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-   -   Fuel - to top off or not to top off? (https://themustangsource.com/forums/f726/fuel-top-off-not-top-off-519704/)

tukatz 3/14/13 03:28 PM

Fuel - to top off or not to top off?
 
I am new to Mustangs and have no experience with the new fuel filler on my Mustang other than having refueled it twice. My instruments said I had used 11.25 gallons at the last fillup, but it took less than 11.1 gallons before the nozzle shut off. Is it a problem if I trigger the nozzle again to top it off? In the cars I am familiar with I can hear the difference when it is close to overflowing. I ask this because on long road trips I want as much range as I can get.

SlowRiderr 3/14/13 04:17 PM

Do not top off. You'll damage your vehicle

PaxtonShelby 3/14/13 04:22 PM


Originally Posted by SlowRiderr (Post 6575932)
Do not top off. You'll damage your vehicle

Huh?

tukatz 3/14/13 04:28 PM


Originally Posted by SlowRiderr (Post 6575932)
Do not top off. You'll damage your vehicle

Could you explain that, please. What sort of damage will it do?

Ethanjbeau 3/14/13 04:29 PM

I always top off a little. Usually to get the price to a .25 interval

tukatz 3/14/13 04:36 PM

I just found a statement in the owner's manual that says allow no more than two automatic click-offs when refueling. I think that's my answer. The second click-off would likely have taken the amount pumped to very close to the 11.25 gallons I was supposed to have used.

11SHELBYGT500 3/14/13 04:37 PM

First click and I then round to the nearest .00 or .50

2013kAB 3/14/13 05:34 PM

on my first fill up, i squeezed through two auto shut offs and the 2nd time a bit of gas squirted out and ran all down the side of my car. since then i've always used the medium-to-slow flow and never ever go past the auto shut off. always fairly close to what's shown as gallons used, within .5 gallon i think.

The Dude 3/14/13 05:39 PM

I just don't do it because I do not want to risk spilling the gas on my car. I hate doing that...

Moustang 3/15/13 11:20 AM

DO NOT TOP IT OFF.


How many of you remember the big rubber boots on gas pumps to collect gas vapors? In case you haven't noticed, those are disappearing. The reason they are disappearing is because cars are now required to have this vapor collection system built into the car itself. If you top off your tank you run the risk of flooding this vapor collection system which damages the system by flooding the charcoal canister with gasoline.

It's not a safety risk per say, but it could cause you to fail safety and emissions tests if you have them. Not to mention you would have to put up with the smell of raw gasoline constantly coming from the back of your car.

cdynaco 3/15/13 11:45 AM


Originally Posted by Moustang (Post 6576523)
DO NOT TOP IT OFF.


How many of you remember the big rubber boots on gas pumps to collect gas vapors? In case you haven't noticed, those are disappearing. The reason they are disappearing is because cars are now required to have this vapor collection system built into the car itself. If you top off your tank you run the risk of flooding this vapor collection system which damages the system by flooding the charcoal canister with gasoline.

It's not a safety risk per say, but it could cause you to fail safety and emissions tests if you have them. Not to mention you would have to put up with the smell of raw gasoline constantly coming from the back of your car.

Correct. :nice:

The overflow enters the vent tubes connected to the charcoal canister and ruins them.

rriddle3 3/15/13 12:35 PM


Originally Posted by Moustang (Post 6576523)
DO NOT TOP IT OFF.


How many of you remember the big rubber boots on gas pumps to collect gas vapors? In case you haven't noticed, those are disappearing. The reason they are disappearing is because cars are now required to have this vapor collection system built into the car itself. If you top off your tank you run the risk of flooding this vapor collection system which damages the system by flooding the charcoal canister with gasoline.

It's not a safety risk per say, but it could cause you to fail safety and emissions tests if you have them. Not to mention you would have to put up with the smell of raw gasoline constantly coming from the back of your car.


Originally Posted by cdynaco (Post 6576546)
Correct. :nice:

The overflow enters the vent tubes connected to the charcoal canister and ruins them.

Those x3

tukatz 3/15/13 12:55 PM

Thanks for the good info, guys. One click and I'll be done.

scramblerider5 3/15/13 12:57 PM

Nice thread:nice:

r1rider98 3/16/13 12:46 PM

two clicks and mine is running over from under the car! Don't know why. I can top off my F150 alot more.

SlowRiderr 3/16/13 01:01 PM

There was a thread on here with people posting how they damaged the charcoal canister? Evap system? from overfilling

2012GT 3/16/13 03:59 PM

I let it click and then round off to the nearest. 05 or. 10. OCD thing.

11SHELBYGT500 3/16/13 04:20 PM


Originally Posted by 2012GT (Post 6577620)
I let it click and then round off to the nearest. 05 or. 10. OCD thing.

Is that .05 or .10 cents? Wha??

2012GT 3/17/13 12:59 PM


Originally Posted by 11SHELBYGT500

Is that .05 or .10 cents? Wha??

Yes sir. Nickel or dime.

11SHELBYGT500 3/17/13 01:01 PM


Originally Posted by 2012GT (Post 6578309)

Yes sir. Nickel or dime.

Lol that's not much of an OCD :jester:


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