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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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krazkar
Champion Author Calgary

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Message Posted: Jan 2, 2015 1:48:57 AM

no
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DAWGnh
Champion Author New Hampshire

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Message Posted: Jan 2, 2015 12:07:36 AM

n
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Buddy2264
Champion Author Tampa

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Message Posted: Jan 1, 2015 11:33:37 PM

I didn't know this was one of the things we were supposed to do to try to conserve and get more fuel. I guess I'll try that the next time just to see.
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hjl17
Champion Author Toronto

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Message Posted: Jan 1, 2015 11:08:41 PM

No
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Skorched
Rookie Author Boise

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Message Posted: Jan 1, 2015 9:24:26 PM

Nope.
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BartandLisa
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Message Posted: Jan 1, 2015 7:44:09 PM

No
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iii06410
Champion Author New Haven

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Message Posted: Jan 1, 2015 7:42:53 PM

No
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thirstysuv2011
Rookie Author Ontario

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Message Posted: Jan 1, 2015 7:40:39 PM

No, never heard of this one.
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NickoliMB
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Message Posted: Jan 1, 2015 7:38:19 PM

No, just to top it up.
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pt88
Champion Author North Carolina

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Message Posted: Jan 1, 2015 7:32:20 PM

No
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kdanish
Champion Author Santa Barbara

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Message Posted: Jan 1, 2015 4:34:34 PM

Yes
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k7lvo
Sophomore Author Medford

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Message Posted: Jan 1, 2015 4:33:24 PM

No.
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hoopitup2000
Champion Author Virginia

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Message Posted: Jan 1, 2015 1:51:06 PM

Yes, pumping slowly will give more consistent fills.
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Nuzan
All-Star Author Nevada

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Message Posted: Jan 1, 2015 1:33:08 PM

No
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47pickup
All-Star Author Minnesota

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Message Posted: Jan 1, 2015 1:22:30 PM

Interesting!
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46chief
Champion Author Indiana

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Message Posted: Jan 1, 2015 12:37:34 PM

no
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krazkar
Champion Author Calgary

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Message Posted: Dec 29, 2014 1:20:16 AM

not really
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iii06410
Champion Author New Haven

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Message Posted: Dec 28, 2014 9:57:16 PM

No but I prob should
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VichyViking
Sophomore Author Missouri

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Message Posted: Dec 28, 2014 11:04:14 AM

Pumping fast will cause more air in your tank which will cause the nozzle to shut off sooner. What I do is this, I know I have a 18.5 gallon tank and judging how much gas I have left I know about how many gallons I need to fill up. So say I need 14 gallons, I pump fast for 12 gallons and as slow as the nozzle can for the next 2 or till it stops.
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morrongiello
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Message Posted: Dec 28, 2014 10:54:39 AM

no
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46chief
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Message Posted: Dec 24, 2014 5:26:12 PM

yes
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GasMiser718
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Message Posted: Dec 24, 2014 2:04:55 PM

No
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tiny1oh
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Message Posted: Dec 21, 2014 6:04:51 AM

no
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Thumper52
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Message Posted: Dec 21, 2014 5:44:06 AM

No
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hjl17
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Message Posted: Dec 2, 2014 8:23:58 AM

No
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47pickup
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Message Posted: Dec 2, 2014 7:09:28 AM

No
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Mitchsoc
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Message Posted: Dec 2, 2014 7:07:11 AM

no
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sheba24
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Message Posted: Dec 2, 2014 6:35:24 AM

No
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cv
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Message Posted: Dec 2, 2014 6:20:28 AM

No, I just slow the flow as the tank nears full.
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tkawashima
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Message Posted: Nov 29, 2014 10:10:05 AM

No
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hjl17
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Message Posted: Nov 29, 2014 9:10:07 AM

No
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stonejd
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Message Posted: Nov 29, 2014 9:07:18 AM

no
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pt88
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Message Posted: Nov 29, 2014 8:59:41 AM

No
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Thumper52
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Message Posted: Nov 29, 2014 5:31:19 AM

No
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GasMiser718
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Message Posted: Oct 30, 2014 3:49:18 PM

No, it sounds like a myth to me.
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Mitchsoc
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Message Posted: Oct 30, 2014 8:34:02 AM

No
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rando991
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Message Posted: Oct 30, 2014 8:32:59 AM

near the end yes
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tiny1oh
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Message Posted: Oct 30, 2014 8:30:06 AM

no
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mandydonnaprinc
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Message Posted: Oct 23, 2014 7:27:33 AM

n
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hjl17
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Message Posted: Oct 23, 2014 7:15:41 AM

No
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NickoliMB
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Message Posted: Oct 22, 2014 4:31:44 PM

Just to top up.
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Midnit
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Message Posted: Oct 22, 2014 3:15:54 PM

No
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GrumpyCat
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Message Posted: Oct 22, 2014 2:04:17 PM

As FranklinON has observed the pump measures the same at all delivery rates.

I don't find gasoline foams as FranklinON claims. But when filling a 2004-2009 Prius the gas tank is a bladder which has to expand when filling. I did find it helped to pump on the slowest rate so as to let the bladder expand its folds.

Diesel foams very easily. Takes about a minute to settle. About a minute after the nozzle cuts off the tank holds about 5% more.
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bhWY
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Message Posted: Oct 22, 2014 1:55:54 PM

no
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Cruiser001
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Message Posted: Oct 22, 2014 1:30:40 PM

Nope
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stonejd
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Message Posted: Oct 22, 2014 1:25:03 AM

no
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estroh
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Message Posted: Oct 22, 2014 12:34:27 AM

Nope
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WilhamClouse
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Message Posted: Oct 21, 2014 11:53:01 PM

no
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ScottAdams5
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Message Posted: Oct 21, 2014 11:32:59 PM

Why do you ask?
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8_Ball2014
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Message Posted: Oct 21, 2014 11:22:37 PM

no
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Cruiser001
All-Star Author Michigan

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Message Posted: Oct 16, 2014 10:02:10 PM

I pump as fast as it will go
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