Have you ever wondered?
11-28-2015, 11:13 PM
#21
Paid Senior Member
Have you ever wondered if the octane buttons are just an idiot test to see who will pay more for the same gas?
Last edited by fullcontrol; 11-28-2015 at 11:14 PM.
11-29-2015, 07:30 AM
#22
Team Owner
Member Since: Sep 2005
Location: Big Bend Country, TX
Posts: 29,114
Received 2,186 Likes
on
1,337 Posts
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
No because that would open up the seller to being charged with theft by deception charges. Not a misdemeanor either. It would be a felony based on volume sold.
11-29-2015, 07:41 AM
#23
Le Mans Master
Member Since: Oct 2005
Location: Plymouth Massachusetts
Posts: 9,477
Received 3,117 Likes
on
1,736 Posts
Finalist 2020 C7 of the Year -- Unmodified
Now that's pushing it and I thought I had a OCD problem when it comes to my Corvette
Last edited by Always Red Dave; 11-29-2015 at 07:42 AM.
11-29-2015, 09:18 AM
#25
Pro
As penniless teens with no money for gas, we used to visit closed gas stations at night to drain the hoses. The gas from several hoses was enough to get us around for a while. I guess the first customers the next day didn’t get all the gas they paid for.
11-29-2015, 09:32 AM
#27
When you pull into a service station to refuel, the guy in front of you just finished filling up with the lowest octane gas. Now I pull up to the same pump and select 92 octane. How much of the low octane fuel remains in the system and is dispensed before the 92 octane is actually supplied to the nozzle?
The following users liked this post:
triton205 (12-03-2015)
11-29-2015, 10:55 AM
#28
Instructor
Member Since: Jan 2015
Location: Baltimore Maryland
Posts: 101
Likes: 0
Received 19 Likes
on
11 Posts
So that also means the next car in line gets their first 0.5 gallons "upgraded" to Premium for free
I'm going to start lining up behind other Corvettes at the pumps, selecting regular and just pumping half a gallon. Then I save $0.20 on each half gallon. Then just drive to the next gas station and wait for another Vette to fill up behind. That's gotta be a good use of my time to save a few bucks :-) :-)
On a serious note, have never thought about it and sure don't care!!!!!
Mark
I'm going to start lining up behind other Corvettes at the pumps, selecting regular and just pumping half a gallon. Then I save $0.20 on each half gallon. Then just drive to the next gas station and wait for another Vette to fill up behind. That's gotta be a good use of my time to save a few bucks :-) :-)
On a serious note, have never thought about it and sure don't care!!!!!
Mark
Last edited by MostlyHarmless; 11-29-2015 at 10:56 AM.
11-29-2015, 11:03 AM
#30
E-Ray, 3LZ, ZER, LIFT
Member Since: Sep 2007
Location: NE South Carolina
Posts: 29,501
Received 9,626 Likes
on
6,630 Posts
When you pull into a service station to refuel, the guy in front of you just finished filling up with the lowest octane gas. Now I pull up to the same pump and select 92 octane. How much of the low octane fuel remains in the system and is dispensed before the 92 octane is actually supplied to the nozzle?
Last edited by JerryU; 11-29-2015 at 11:04 AM.
11-29-2015, 12:40 PM
#32
Race Director
Member Since: Jun 2005
Location: Phila Suburbs 2023 C8 & 2013 650ix
Posts: 10,427
Received 2,225 Likes
on
1,141 Posts
I'll second that no.
11-29-2015, 01:55 PM
#33
Melting Slicks
11-29-2015, 02:04 PM
#34
Administrator
Member Since: Mar 2001
Location: In a parallel universe. Currently own 2014 Stingray Coupe.
Posts: 343,014
Received 19,305 Likes
on
13,977 Posts
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-
'20-'21-'22-'23-'24
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Never crossed my mind. I have more important things to worry about I guess.
11-29-2015, 09:50 PM
#38
Burning Brakes
Member Since: Jul 2008
Location: Suwanee GA
Posts: 1,177
Received 296 Likes
on
214 Posts
St. Jude Donor '16
To the OP: My business has been selling, installing, and servicing gas pumps for 43 years. I know them inside and out and can answer any questions you have about how they work. The bottom line is that the fuel remaining in the hose on a single-hose, multi-grade dispenser is a negligible amount that will not degrade or enhance the octane rating of the delivery. There is a mixing block at the top of the dispenser just upstream of the hose attachment fitting. This is where the fuel is blended (if the dispenser is blending 87 octane with 93 octane to arrive at the 89 mid-grade octane) or in the case of a non-blender, where each octane grade flows through a dedicated pipe from its meter to the mixing block.
The state department of agriculture in most states is tasked with verifying the accuracy of volume delivered and also octane rating of fuel dispensed from gasoline dispensers. There are standards of performance (U.S. Departmlent of Agriculture, Weights and Measures Division, Handbook 44) that define what is acceptable. There is a nominal volume of fuel that is left between the mixing block and nozzle at the end of the delivery. There is an anti-drain valve in the nozzle to prevent someone from draining the fuel from the hose. In a tyical fuel purchase, the minimal volume of lower or higher octane fuel in the hose does not affect the octane rating of the balance of the fuel delivered.
Hope this helps. PM me with any other questions.
BJ
The state department of agriculture in most states is tasked with verifying the accuracy of volume delivered and also octane rating of fuel dispensed from gasoline dispensers. There are standards of performance (U.S. Departmlent of Agriculture, Weights and Measures Division, Handbook 44) that define what is acceptable. There is a nominal volume of fuel that is left between the mixing block and nozzle at the end of the delivery. There is an anti-drain valve in the nozzle to prevent someone from draining the fuel from the hose. In a tyical fuel purchase, the minimal volume of lower or higher octane fuel in the hose does not affect the octane rating of the balance of the fuel delivered.
Hope this helps. PM me with any other questions.
BJ
Last edited by OVERULD; 11-30-2015 at 09:48 AM.
11-30-2015, 08:08 PM
#40
Safety Car
Hardly an issue for a car-size gas tank. I've researched this a bit, and found estimates from as little as 1/2 litre (from Shell Canada, IIRC) to 1/3 gallon. Assume the worst case, and you put 15 gallons in.
1/3 gallon out of 15 is 1/45 of the fill, or about 2%. Or look at it this way:
1/3 gallon at 87, 44/3 gallons at 93.
1*87 + 44 * 93 / 45 = 92.8666. And that's worst case. If it's only 1/2 liter, you're getting something like 92.99
This may be a real concern for motorcycles with small tanks, but not Corvettes.
1/3 gallon out of 15 is 1/45 of the fill, or about 2%. Or look at it this way:
1/3 gallon at 87, 44/3 gallons at 93.
1*87 + 44 * 93 / 45 = 92.8666. And that's worst case. If it's only 1/2 liter, you're getting something like 92.99
This may be a real concern for motorcycles with small tanks, but not Corvettes.