91 octane or better?

[~TABASCO~]

X 2.

 

[freeflow]

It's a problem for general aviation and really small gas tanks, like scooters, but we don't need to worry with our cars or motorcycles. The EPA requires pumps to have a built in vapor recovery system and those are designed to also draw the fuel back down to the tank. I've heard the calibration guys talk about leaving from a cup to a half gallon in the hose.

???
vapor recovery systems (stage 2) recover vapors and any condensed or slurped product to go back to the tank...this system does NOT drain the hose or product piping....modern single hose MPDs (multiple product dispensers) have a blender mechanism that blends low grade and high grade fuels to get the desired mid grade. this saves cost and requires a station to only have 2 tanks...and makes fuel deliveries easier. so basically the hose and a little bit of piping in the dispenser itself will be the amount of low grade is dispensed when you select high grade (assuming previous customer selected low grade). so figure hose length = L, 1" hose contains === 3.14 x( (1/12)^2)/4 x 7.48 x L gallons

but hey, it's not like I work in the business for the last 25 years

 

[colorider]

???
vapor recovery systems (stage 2) recover vapors and any condensed or slurped product to go back to the tank...this system does NOT drain the hose or product piping....modern single hose MPDs (multiple product dispensers) have a blender mechanism that blends low grade and high grade fuels to get the desired mid grade. this saves cost and requires a station to only have 2 tanks...and makes fuel deliveries easier. so basically the hose and a little bit of piping in the dispenser itself will be the amount of low grade is dispensed when you select high grade (assuming previous customer selected low grade). so figure hose length = L, 1" hose contains === 3.14 x (1/12)^2/4 x 7.48 x L gallons

but hey, it's not like I work in the business for the last 25 years

Hey - great first post and information!!! Glad to see you come out of lurk mode!!!!

 

[freeflow]

While I certainly agree that ethanol increase the octane rating, it typically reduces the mileage compared to non-ethanol enhanced gasoline.

YMMV

CORRECT...ethanol has about 85,000 btu/gal...gasoline has about 125,000 btu/gal....you are getting less BTUs with ethanol. so a weighted average = (0.1 x 85,000 + 0.9 x 125,000)/125,000 = 121,000 btu/gal ===96.8 % of actual gasoline...a 3.2% LOSS in available energy

 

[Combo]

Check this out.

List of stations that sell ethanol-free gasoline in the U.S. and Canada!

http://pure-gas.org/index.jsp?stateprov=TX

 

[socallee]

A simple solution to get all 91 octane is to ride with friends, and let them fill up first, you just look polite.

 

[Floracycle]

Read this post.

http://www.yamahasupertenere.com/index.php?topic=1957.msg33023;topicseen#new

Does this mean there could be a fix (electronic) to allow the burning of regular fuel?

Someone smarter than me should be able to figure it out.