Welcome to the North American Subaru Impreza Owners Club Monday March 18, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Archives > NASIOC Archives > General Forum Archive

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
 
 
Thread Tools Display Modes
Old 02-07-2001, 10:35 AM   #1
Bobalouy
Scooby Specialist
 
Member#: 827
Join Date: Jan 2000
Chapter/Region: MAIC
Location: Bel Air, MD,USA
Vehicle:
99 2.5rs,BDP,
02 WRX, 09 Legacy

Post New gas pumps at the gas station?ripoff?

The other day I was getting gas, and reacently the local Texico got new pumps, the kind with only one nossel for all three types of gas. Usually when I'm getting gas I'm just in a daze watching cars pass, but for some reason yesterday I was actually thinking.That hose is pritty long, so it probably holds at least a gallon of gas. If the person befor me used the lowest grade gas, and I put in the Highest grade that means, the left over cheep gas in the hose is the first thing that went in my tank. So that's one gallon of gas that I'm paying the high price and getting the low grade gas, and the gallon of high grade that I paid for is in the hose for the next person. I'm not a worried about the extra money I just don't want that low grade in my gas tank.

Does this sound logical to anyone or am I just wierd?

Anthony C.
* Registered users of the site do not see these ads.
Bobalouy is offline  
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-07-2001, 10:38 AM   #2
bratmantlz
Scooby Specialist
 
Member#: 3231
Join Date: Dec 2000
Chapter/Region: RMIC
Location: colorado springs colorado usa
Vehicle:
88 626 Turbo
white

Have a Nice Day?

hey that does sound like what would happen.. *** that makes me want to go to stations with three hoses one for each grade hmmm got me thinking. the monkey speeks for me gas costs an arm and a leg anyways.
bratmantlz is offline  
Old 02-07-2001, 10:47 AM   #3
crash
Scooby Specialist
 
Member#: 1440
Join Date: May 2000
Chapter/Region: South East
Location: Keeps Bumpers Fresher, Longer!
Vehicle:
05 LGT Wgn; 04 FXT
BDSM -- Birmingham, AL

Post

I'm not sure about your theory, although it sounds very sound....

I do know that those types of pumps mix low grade and high grade together to make mid grade....

That way the gas stations only have to buy 2 grades instead of 3 (and have only 2 underground tanks instead of 3) Also, calling those things pumps is not really accurate anymore, the pumps are now in the ground, and the "dispensers" just spit it out and track how much you've gotten.

The pumps are the ones that are mechanical and make that humming sound when you flip the on switch....

(I have a friend that used to service pumps and dispensers at gas stations)

-Nate
crash is offline  
Old 02-07-2001, 10:48 AM   #4
scoobiejosh
Scooby Specialist
 
Member#: 3139
Join Date: Dec 2000
Chapter/Region: RMIC
Location: SLC Utah
Vehicle:
2015 Outback

Post

unless you have a turbo you want the low octane gas anyways. We dont need high octane. but i do see your point.

Josh
scoobiejosh is offline  
Old 02-07-2001, 10:49 AM   #5
enuttage
Scooby Newbie
 
Member#: 3490
Join Date: Jan 2001
Location: Austin, TX
Post

How 'bout this?

You stop on the way home from work/school 'cause you're low on gas. You don't have a lot of flow, but you've got a five spot in your pocket. You pump that 3 gallons of gas into your car, one gallon of which is 87 octane (fill in lowest grade in your location).

Not good for the brand new WRX requiring at least 91 octane. I know it's not gonna fry your car right then and there, but long term, it sure isn't good for it.

-Eric B.
enuttage is offline  
Old 02-07-2001, 11:22 AM   #6
scoobiejosh
Scooby Specialist
 
Member#: 3139
Join Date: Dec 2000
Chapter/Region: RMIC
Location: SLC Utah
Vehicle:
2015 Outback

Post

sorry my last post was for a non-turbo 2.5. Or any other normaly aspirated car with compression as low as a 2.5. just clairfying. If you got a WRX or other turbo go to the next gas station, should be one on the oposite corner. Exxon and Mobile are the only ones i got to and they dont do the single "dispencer" stuff.

Josh
scoobiejosh is offline  
Old 02-07-2001, 11:30 AM   #7
Lix
Scooby Newbie
 
Member#: 1560
Join Date: May 2000
Location: San Mateo,Ca,USA
Post

I don't think it's that big a deal...the pump probably only pumps when it is in use. When the pump is not in use gravity (edit: whoops...not gravity, but through principals used in Bernolli's equation. Since the pressure in the atmosphere is higher than in the tank, which is a vacuum, the fluid will go back into the tank)will be acting on the fluid in the fuel lines and pull them back into the tank. I doubt the gas station is going to pay for a pump that holds fluid inside the hose when it doesn't need to. At most you'll probably be getting some 87 Octane residules.

[This message has been edited by Lix (edited February 07, 2001).]
Lix is offline  
Old 02-07-2001, 11:41 AM   #8
8Complex

Moderator
 
Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
Vehicle:
16 WRX (white)
04 FXT (red)

Post

Actually gravity would cause most of that to fall to even out with the level of the filler. At 7.48gal/cu.ft. let's say 48" of the hose is below the filler and the hose is 3/4" ID... thats 21.21cu.in. (.0122 cu.ft.). .0122 of 7.48gal is .091 gallons.

Looks like you're only getting about .1gal or so from that hose. I'm sure most/all of it that is pumped up to the top of the unit (station pump) is drained back into the tank by gravity or at least it may be split at the top of the unit in which case there is probably less then a foot of hose between the junction and the hose leading to the filler which may still have gas in it.

All in all, you aren't getting much low-grade fuel there. Feel better now?
8Complex is offline  
Old 02-07-2001, 11:53 AM   #9
enuttage
Scooby Newbie
 
Member#: 3490
Join Date: Jan 2001
Location: Austin, TX
Post

Ahhh, the unaccounted for miracle of the siphon.

-Eric B.
enuttage is offline  
Old 02-07-2001, 01:36 PM   #10
8Complex

Moderator
 
Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
Vehicle:
16 WRX (white)
04 FXT (red)

Post

Ahhhhh... I forgot about the driving valve in the handle. Well even if there is 12 feet of hose, that is still only .3 gallons of gas to the top of the hose, though.
8Complex is offline  
Old 02-07-2001, 01:51 PM   #11
Steve Theodore
Scooby Newbie
 
Member#: 3737
Join Date: Jan 2001
Chapter/Region: NWIC
Location: North Bend, WA, USA
Vehicle:
2007 WRX STi
Crystal Gray Metallic

Cool

Don't worry because your ECU will adjust for the lower grade gas. Just don't crank up the boost on the WRX if you have crummy gas in the tank. For normal driving, it won't be a big deal.

Steve
Steve Theodore is offline  
Old 02-07-2001, 01:58 PM   #12
Gambit
Scooby Specialist
 
Member#: 102
Join Date: Jul 1999
Location: The meeting place
Post

talk about paranoia.

i use regular. therefore i don't have the worries.
Gambit is offline  
Old 02-07-2001, 03:58 PM   #13
CosmoTheCat
Scooby Newbie
 
Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Oly
Vehicle:
98 My FMIC
Is bigger than yours.

Post

I find that I like to go to gas stations with the old non-vapor recovery nozzles. They spill a lot less. I can stick my ear (and nose too!) by the filler and listen for the gurgles. I also shut the pump off and keep squeazing the handle to get the last drops. Once I had a good steady stream of gas for 30 seconds after the pump stopped... all that would have been left in the hose. So the guy behind me got to pay to fill the hose back up!
CosmoTheCat is offline  
Old 02-08-2001, 12:00 AM   #14
micah
Scooby Newbie
 
Member#: 3154
Join Date: Dec 2000
Location: Columbia, SC, USA
Post

I don't think it would be a gallon. Somebody look at the ID of that hose (I think its printed on it) and estimate the length and do the calculation, or post the stuff and I will. Hold on... lets say 12' of 0.75" ID hose, that's about a quart. Say you only get 5 gallons. 1 quart 87 + 4.75 gallons 91= 90.8 octane. Should be fine.

mbs
micah is offline  
Old 02-08-2001, 12:07 AM   #15
El Kabong
Scooby Newbie
 
Member#: 625
Join Date: Dec 1999
Chapter/Region: TXIC
Location: Austin, TX
Vehicle:
2005 STi
WRB/Gold

Post

Ah, very interesting... Never thought about it before... I guess the solution is to just pump that first hose worth onto the ground, then start filling up your car... hehehe... just kidding of course. I'd be curious to know how much is actually in the hose.
El Kabong is offline  
Old 02-08-2001, 12:10 AM   #16
Opie
Floresbian
Moderator
 
Member#: 470
Join Date: Oct 1999
Chapter/Region: South East
Location: Riverview, Florida - U.S.A.
Vehicle:
2020 Canyon Denali
'21 Forester & '13 BRZ

Wink

Or think about it the other way...if the guy before you got premium, and you wanted the regular grade...you would be getting a little premium for the price of regular grade!
Opie is offline  
Old 02-08-2001, 12:35 AM   #17
ba_feitl
Scooby Specialist
 
Member#: 2884
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Wheaton, IL
Vehicle:
2004 Forester
Silver

Post

good call opie...

i bet your glass is always half full !

Brad
ba_feitl is offline  
Old 02-08-2001, 12:38 AM   #18
ImprezedRS
Scooby Specialist
 
Member#: 2771
Join Date: Oct 2000
Location: Charlotte, NC
Vehicle:
2003 BMW Z4
Blue

Post

Ok i will put my thought into this one since i worked at a gas station. Ok i do agree that there is at least a half gal of fuel in the line since it is in a U shape conected to the very top of the pumps. but emough of that this is where the truth shows through. Ok have you ever seen someone drive off with the nozzle still in the car, well if you have the hose usually breaks and fuel goes everwhere well that fuel is what was in the hose as there are two vavles on the hose, one inside the pump and one on the nozzle so when you turn off the valve on the nozzle it stops the fuel from going out then after you pay the clerk truns off the vavle before the hose you can't get any gas till they authorizes it(thats why it take so long sometime for the pump to come on) so when its not in use both valves would be closed so fuel would still be inside the hose.
ImprezedRS is offline  
Old 02-08-2001, 12:53 AM   #19
Bobalouy
Scooby Specialist
 
Member#: 827
Join Date: Jan 2000
Chapter/Region: MAIC
Location: Bel Air, MD,USA
Vehicle:
99 2.5rs,BDP,
02 WRX, 09 Legacy

Post

Well I guess its not that big of a deal but at least I got some people thinking.

Anthony C.
Bobalouy is offline  
Old 02-08-2001, 12:59 AM   #20
Jaxx
Scooby Guru
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Austin, Texas, USA
Vehicle:
The 93 W/EJ20K-sold
Subaru-less :(

Post

just squirt a gallon er so into the window washer deal
Jaxx is offline  
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Driving off at the gas station with the nozzle still in the car :-( xknowonex Off-Topic 51 04-30-2006 08:34 PM
Retardation at The Gas Station WagonMonster Off-Topic 49 01-13-2005 07:20 PM
Exchange I had at the gas station last night (long and boring) beachbum Off-Topic 13 05-21-2004 12:23 PM
Met a cool dude at the gas station DarkShadow Texas Impreza Club Forum -- TXIC 0 08-13-2002 02:13 PM
Odd Problem At The Gas Station North Ursalia New England Impreza Club Forum -- NESIC 17 01-18-2002 10:10 AM

All times are GMT -4. The time now is 11:37 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.