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

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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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estroh
Champion Author Indiana

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Message Posted: Jul 20, 2014 12:02:18 AM

nope
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sh1361
Sophomore Author Birmingham

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Message Posted: Jul 18, 2014 7:28:54 PM

Did Big Foot share this information with you?
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estroh
Champion Author Indiana

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Message Posted: Jul 18, 2014 12:14:23 AM

nope
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nickless
Champion Author PEI

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Message Posted: Jul 15, 2014 1:42:55 AM

no
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DAWGnh
All-Star Author New Hampshire

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Message Posted: Jul 15, 2014 12:24:44 AM

no
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estroh
Champion Author Indiana

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Message Posted: Jul 15, 2014 12:20:59 AM

nope
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46chief
Champion Author Indiana

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Message Posted: Jul 6, 2014 1:12:28 PM

Yes, sometimes. I don't know if it makes a difference or not.
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contiki
Champion Author Ontario

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Message Posted: Jun 2, 2014 6:33:06 AM

Never...........
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John_Doe
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Message Posted: Jun 2, 2014 3:43:48 AM

no
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estroh
Champion Author Indiana

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Message Posted: Jun 2, 2014 12:55:40 AM

nope
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contiki
Champion Author Ontario

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Message Posted: May 30, 2014 6:33:39 AM

Never..........
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EvPv
Champion Author Maine

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Message Posted: May 30, 2014 4:41:05 AM

no.
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ScottAdams5
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Message Posted: May 30, 2014 4:16:35 AM

No.
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prkuehn
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Message Posted: May 30, 2014 3:04:03 AM

No
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cistech
Sophomore Author Massachusetts

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Message Posted: May 29, 2014 11:24:17 PM

no.
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pt88
Champion Author North Carolina

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Message Posted: May 29, 2014 6:26:49 PM

No
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mrhatandcoat
Veteran Author Illinois

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Message Posted: May 29, 2014 2:50:29 PM

nope
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NickoliMB
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Message Posted: May 26, 2014 10:54:23 AM

No.
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contiki
Champion Author Ontario

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Message Posted: May 26, 2014 6:26:42 AM

No.............
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hjl17
Champion Author Toronto

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Message Posted: May 25, 2014 2:17:09 PM

No
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OilerFan
Champion Author Tulsa

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Message Posted: May 25, 2014 10:16:49 AM

I just air it up and check with the gauge, and if it's too much, I release a little bit of air and check again.
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IFM
Sophomore Author Seattle

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Message Posted: May 25, 2014 9:35:46 AM

No Difference
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Sugarshaneo7
Veteran Author Michigan

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Message Posted: May 25, 2014 9:19:29 AM

yes
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mawtaow
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Message Posted: May 25, 2014 5:27:44 AM

no
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stonejd
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Message Posted: May 25, 2014 1:09:42 AM

no
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stayathomedad2
Rookie Author Edmonton

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Message Posted: May 25, 2014 1:05:35 AM

no .... especially this past winter ... pump and get out
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estroh
Champion Author Indiana

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Message Posted: May 25, 2014 1:00:19 AM

Nope
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DAWGnh
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Message Posted: May 22, 2014 8:31:02 AM

No
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sheba24
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Message Posted: May 22, 2014 7:20:00 AM

No
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RadarIN
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Message Posted: May 22, 2014 7:08:24 AM

no
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contiki
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Message Posted: May 22, 2014 6:31:52 AM

No..............
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CptSteve
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Message Posted: May 9, 2014 3:41:26 PM

Nope. Really no need.
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ace12012
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Message Posted: May 9, 2014 1:32:34 PM

no
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EVBuddy
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Message Posted: May 9, 2014 12:47:32 PM

NO, pump slows on the last 50 cents
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redfish67
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Message Posted: May 9, 2014 12:09:05 PM

no
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MVP1
Champion Author New York

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Message Posted: May 9, 2014 11:00:21 AM

What comes out of the pump isn't affected by the speed of pumping. What happens at higher pump speeds after it leaves the pump is more air mixes with the fuel in the tank... You get what you pay for.

If you ever pump something like kerosene at high speed you will see it foams, while at low speed it doesn't.
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chrisd552
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Message Posted: May 9, 2014 10:53:22 AM

Nope! Full speed ahead!
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kdanish
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Message Posted: May 9, 2014 10:46:32 AM

Yes
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tkawashima
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Message Posted: May 9, 2014 10:18:30 AM

no
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pt88
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Message Posted: May 9, 2014 10:00:09 AM

no
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nichols
Champion Author Halifax

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Message Posted: May 9, 2014 9:19:08 AM

no, gas should push the air back out if there is any going in.
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inventorymaster
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Message Posted: May 9, 2014 8:23:15 AM

no
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WES03
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Message Posted: May 9, 2014 7:40:13 AM

No.
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BobFang
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Message Posted: May 9, 2014 7:17:57 AM

No
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mobal
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Message Posted: May 9, 2014 7:00:17 AM

no
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Seekingone
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Message Posted: May 9, 2014 5:56:42 AM

no
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cv
Champion Author Raleigh

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Message Posted: May 9, 2014 5:54:15 AM

No, because I am usually in a hurry to get moving.
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Kinglemuel
All-Star Author North Carolina

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Message Posted: May 6, 2014 12:38:01 PM

I have not heard of this. I would suspect that the reason that you can get more gas in the tank by pumping slowly (from my experience) is that the auto shutoff kicks in sooner if you are pumping fast in order to keep you from overflowing your tank.
Regarding air, the most significant thing in my opinion is to keep your tank as full as you can, so there is less air in the tank for the fuel to vaporize into.
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BAJALRRP
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Message Posted: May 6, 2014 12:06:20 PM

This is all urban legend stuff.
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wamster
Champion Author Houston

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Message Posted: May 6, 2014 10:53:48 AM

Huh. I never heard of this, but will try it next time.
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