gas station question??(pumps)
Aug 17, 2010 | 01:30 PM
#12
Trailblazer
Joined: Mar 2010
Posts: 74
Likes: 0
I sell the blending pmps you are discussing. The blend valve is usually directly before the hose. You are correct in saying that everything in the hose is what ever product that was dispensed before you. It is minimal but it might not be supreme. If you are really worried about it try to buy your fuel in larger quantities and you will get more supreme for your buck. The average hose has a 3/4" ID and is about 8 feet long. You can do the math and find out exactly what is in the hose. You can also watch other people filling and go to the pump that has just used supreme and you will get 100% supreme.
Hope this helps clear things up.
Hope this helps clear things up.
Aug 17, 2010 | 01:36 PM
#13
Trailblazer
Joined: Mar 2010
Posts: 74
Likes: 0
Another note. Any of you states or provinces that are using ethanol. That is a natural octane boost. The more ethanol the more octane. E10 means 10% ethanol and 90% gasoline. E20 means 20% ethanol and 80% percent gasoline and so on. I am not sure of the octane rating for E100 but it must be high. As far as I know octane does nothing else but to stop knock.
Aug 17, 2010 | 03:48 PM
#15
Pro Rider
Joined: Mar 2007
Posts: 408
Likes: 0
From: Montrose, MN
Using 3/4" ID and 8' of hose...here's the math...and someone please correct me if I screw it up??
Hose ID = 0.750 inches
Radius = divided by 2 = 0.375 inches
(12 Inches of standard hose)= 0.375 x 0.375 x 12 x 3.1415 = 5.3 cubic inches
1 gal. = 231 cubic inches
5.3/231 = .0229 gallons per foot of hose
Using 8' of hose hose.... 0.1835 gallons of fuel left in the hose.
Prior I used .675 ID and 10' of hose...that added up to 0.186.
Wenty
Aug 17, 2010 | 04:20 PM
#16
Thread Starter
|
Ride like you own it, Not like it's stolen!
Joined: May 2006
Posts: 3,589
Likes: 1
From: Ontario
[QUOTE=Wenty;2952300]The fuel that is left in the hose is a very minor amount.
How a Island is set up....each tank line comes up into the island, generally 3 grades of gas. Those 3 lines are connected to the pump/selector and each has a individual drain back valve. The line goes to the top of the island.
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I was told by a person working at a station ...The truck and tanks in the ground only have The low grade and the high grade(ex 87 low 91 high) So 89 octance is the middle.............The mid grade is just a 50/50 mix of the two comming together...............Except for the Sunoco thats has the Ultra 94 here in Canada...........
This turned into a intresting topic .......I never thought there wold be so many replies over my silly question....LOL..........
just think if you went to buy anything else and you were not getting 100% what you paid for?
example 24 case of beer.........and end up with .189 gallons of water ....LOL......
Caper..........
How a Island is set up....each tank line comes up into the island, generally 3 grades of gas. Those 3 lines are connected to the pump/selector and each has a individual drain back valve. The line goes to the top of the island.
...
...
I was told by a person working at a station ...The truck and tanks in the ground only have The low grade and the high grade(ex 87 low 91 high) So 89 octance is the middle.............The mid grade is just a 50/50 mix of the two comming together...............Except for the Sunoco thats has the Ultra 94 here in Canada...........
This turned into a intresting topic .......I never thought there wold be so many replies over my silly question....LOL..........
just think if you went to buy anything else and you were not getting 100% what you paid for?
example 24 case of beer.........and end up with .189 gallons of water ....LOL......
Caper..........
Aug 17, 2010 | 04:24 PM
#17
Supersock
Hired Gun!
"Badges? We don't need no stinkin' badges!"
Hired Gun!
"Badges? We don't need no stinkin' badges!"
Joined: Apr 2003
Posts: 142,424
Likes: 182
From: Land of the misfit toys
That sir, is an outrage!
Aug 18, 2010 | 02:41 AM
#19
Pro Rider
My home made pliers did get the job too.
My home made pliers did get the job too.
Joined: Dec 2006
Posts: 397
Likes: 0
From: Nashwauk, MN
The fuel that is left in the hose is a very minor amount.
How a Island is set up....each tank line comes up into the island, generally 3 grades of gas. Those 3 lines are connected to the pump/selector and each has a individual drain back valve. The line goes to the top of the island.
Once I'm done filling up with say 87...gravity takes any gas that's left in the line and it drains back to the holding tank...except the minor amount that's left in the hanging hose.
Some quick math.
Standard Hose ID = 0.675 inches
Radius = divided by 2 = 0.3375 inches
(12 Inches of standard hose)= 0.3375 x 0.3375 x 12 x 3.1415 = 4.29 cubic inches
1 gal. = 231 cubic inches
4.294/231 = .0186 gallons per foot of hose
A 10' hose contains at most.... 0.186 gallon of fuel.
If a guy is that worried about .186 of a gallon of say 87 octane...it's time to search out a individual high octane pump.
I'd be more concerned with high octane gas sitting in the tank for extended periods of time and lossing octane than I would the amount of fuel left over in the hose.
Wenty
How a Island is set up....each tank line comes up into the island, generally 3 grades of gas. Those 3 lines are connected to the pump/selector and each has a individual drain back valve. The line goes to the top of the island.
Once I'm done filling up with say 87...gravity takes any gas that's left in the line and it drains back to the holding tank...except the minor amount that's left in the hanging hose.
Some quick math.
Standard Hose ID = 0.675 inches
Radius = divided by 2 = 0.3375 inches
(12 Inches of standard hose)= 0.3375 x 0.3375 x 12 x 3.1415 = 4.29 cubic inches
1 gal. = 231 cubic inches
4.294/231 = .0186 gallons per foot of hose
A 10' hose contains at most.... 0.186 gallon of fuel.
If a guy is that worried about .186 of a gallon of say 87 octane...it's time to search out a individual high octane pump.
I'd be more concerned with high octane gas sitting in the tank for extended periods of time and lossing octane than I would the amount of fuel left over in the hose.
Wenty
Aug 18, 2010 | 03:06 AM
#20
Pro Rider
Joined: Oct 2003
Posts: 1,448
Likes: 0
Another note. Any of you states or provinces that are using ethanol. That is a natural octane boost. The more ethanol the more octane. E10 means 10% ethanol and 90% gasoline. E20 means 20% ethanol and 80% percent gasoline and so on. I am not sure of the octane rating for E100 but it must be high. As far as I know octane does nothing else but to stop knock.