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Author Topic: Do you pump slowly, in order to have less air in the gas? Back to Topics
FranklinON

Veteran Author
Ottawa

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Message Posted: Jul 19, 2013 2:24:52 PM

I'm not sure if this is a myth - but I've been told that if you squeeze the pump so the fuel goes at top speed into your car, there's more air going into your tank, and you're paying for air. Conversely, if you have a light touch on the pump trigger, it takes twice as long to fill up but your gas is more 'gas', and less air, with the same overall volume & cost.

I've tried it - and so far all I can see is that I'm getting more volume into the car. Last night I put 42L into my car, which has a 40L tank, and the needle wasn't quite on E yet when I went to fill up.

I wish there were a search function on our forums, so I could find out if this has already been covered. I did check the most recent 5 pages. Does anyone know if pump speed affects the amount of air in your fuel?

REPLIES (newest first) Post a Reply
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46chief
Champion Author Indiana

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Message Posted: Apr 24, 2014 1:10:59 PM

I don't think so.
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kdanish
Sophomore Author Santa Barbara

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Message Posted: Apr 24, 2014 10:42:08 AM

I don't think so
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tkawashima
Champion Author Honolulu

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Message Posted: Apr 24, 2014 10:17:15 AM

no
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DAWGnh
Veteran Author New Hampshire

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Message Posted: Apr 24, 2014 9:53:08 AM

no
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NickoliMB
Champion Author Manitoba

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Message Posted: Apr 24, 2014 9:23:59 AM

Near topping only.
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Rob655321
Rookie Author Virginia

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Message Posted: Apr 24, 2014 9:22:20 AM

no
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pt88
Champion Author North Carolina

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Message Posted: Apr 24, 2014 9:20:29 AM

no
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shstew
Veteran Author British Columbia

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Message Posted: Apr 24, 2014 8:52:29 AM

That's the dumbest thing I've read in a while.
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bhWY
Sophomore Author Wyoming

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Message Posted: Apr 24, 2014 8:41:37 AM

no
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inventorymaster
Champion Author KW

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Message Posted: Apr 24, 2014 8:40:42 AM

no
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lwood655
All-Star Author New Orleans

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Message Posted: Apr 24, 2014 8:19:20 AM

no
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tiny1oh
Veteran Author Akron

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Message Posted: Apr 24, 2014 5:50:53 AM

no, does it work?
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randy3116
All-Star Author Tennessee

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Message Posted: Apr 24, 2014 5:41:20 AM

no
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cv
Champion Author Raleigh

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Message Posted: Apr 24, 2014 5:40:17 AM

No, I usually just fill up as the pump allows.
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mawtaow
Champion Author Boston

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Message Posted: Apr 20, 2014 7:14:12 AM

no
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estroh
Champion Author Indiana

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Message Posted: Apr 20, 2014 1:44:06 AM

nope
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Nuzan
Sophomore Author Anchorage

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Message Posted: Apr 14, 2014 1:10:36 PM

No
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PatAZ
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Message Posted: Apr 14, 2014 12:09:51 PM

No
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pt88
Champion Author North Carolina

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Message Posted: Apr 14, 2014 9:25:25 AM

no
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speedy700
Champion Author New Jersey

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Message Posted: Apr 14, 2014 9:02:42 AM

No
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inventorymaster
Champion Author KW

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Message Posted: Apr 14, 2014 8:42:11 AM

no
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goldmonk
Sophomore Author Toronto

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Message Posted: Apr 14, 2014 8:27:25 AM

no
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contiki
Champion Author Ontario

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Message Posted: Apr 14, 2014 7:31:29 AM

no...........
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randy3116
All-Star Author Tennessee

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Message Posted: Apr 11, 2014 5:46:52 AM

always pumped normal flow
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MertieMan
Champion Author Lexington

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Message Posted: Apr 11, 2014 5:22:19 AM

I pump fast as I can because equates to nothing.
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ScottAdams5
Champion Author New York

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Message Posted: Apr 11, 2014 3:58:30 AM

No.
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eyegotgas2
Champion Author British Columbia

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Message Posted: Apr 11, 2014 3:55:12 AM

I pump slowly near the end to get more gas in before the auto cut off kicks in.
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mrhatandcoat
Sophomore Author Illinois

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Message Posted: Apr 11, 2014 3:07:43 AM

I fuel early and full speed ahead
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estroh
Champion Author Indiana

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Message Posted: Apr 11, 2014 12:04:22 AM

Nope
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mzzlett
Rookie Author Cleveland

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Message Posted: Apr 9, 2014 1:01:53 PM

No
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redfish67
All-Star Author Dallas

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Message Posted: Apr 9, 2014 11:24:57 AM

no
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Richardsonphil7
Rookie Author Savannah

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Message Posted: Apr 9, 2014 11:10:20 AM

Now that's funny. Never thought about it before but the pumps are calibrated and tested - so I don't think it will matter how fast you pump the gas.
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chrisd552
Champion Author Iowa

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Message Posted: Apr 9, 2014 10:50:51 AM

Nope...full speed ahead!
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tkawashima
Champion Author Honolulu

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Message Posted: Apr 9, 2014 10:46:24 AM

no
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PhilnTX
All-Star Author Dallas

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Message Posted: Apr 9, 2014 10:31:23 AM

There is an incredible amount of air in a gas after it hits the inside of your tank . I fill my 2010 Silverado (26 gallon tank) at the maximum flow. It always shuts off about 3-4 gallons from full because the air bubbles cause the liquid mass to go up into the nozzle. It normally takes another 3-5 minutes to add that final 3-4 gallons to the tank. You can see the air bubbling out.

Once settled, the air comes out.

Yes only gasoline is metered, but when it hits the bottom of the tank, it becomes aerated.

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pt88
Champion Author North Carolina

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Message Posted: Apr 9, 2014 10:00:54 AM

no
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gvan
Champion Author Chicago

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Message Posted: Apr 9, 2014 9:42:58 AM

No, wide open fast as it will go.
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kennyman
Champion Author Alberta

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Message Posted: Apr 9, 2014 1:58:16 AM

I do fill my fuel tank slowly so I can add more fuel before it cuts off the pump. I don't think there is air in the gas when pumping fuel.
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estroh
Champion Author Indiana

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Message Posted: Apr 9, 2014 12:05:41 AM

nope
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hjl17
Champion Author Toronto

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Message Posted: Apr 2, 2014 8:41:53 AM

no
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MertieMan
Champion Author Lexington

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Message Posted: Apr 2, 2014 8:22:42 AM

It is entirely a myth.
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rmw10rpw
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Message Posted: Apr 2, 2014 8:05:56 AM

no
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goldmonk
Sophomore Author Toronto

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Message Posted: Apr 2, 2014 8:05:23 AM

no
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Thumper52
Champion Author New Brunswick

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Message Posted: Apr 2, 2014 5:12:21 AM

No
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twt
Champion Author Virginia Beach

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Message Posted: Apr 2, 2014 4:08:55 AM

Another fairy tale.
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JoeKing
Champion Author Manitoba

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Message Posted: Apr 2, 2014 3:50:52 AM

no
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stonejd
Champion Author Illinois

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Message Posted: Apr 2, 2014 1:38:19 AM

no
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estroh
Champion Author Indiana

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Message Posted: Apr 2, 2014 1:11:41 AM

Nope
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lwood655
All-Star Author New Orleans

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Message Posted: Mar 28, 2014 9:04:49 AM

no
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Maxer105
Champion Author New Jersey

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Message Posted: Mar 28, 2014 6:12:49 AM

Don't pump in NJ.
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