Can I drain off the ethanol?

brett s

Gold Supporter
Joined
May 29, 2004
Messages
2,386
Location
Ball Ground, GA
Aircraft
none currently
Total Flight Time
1300 helicopter
They start with lower octane gas & bring it up to the labeled rating with ethanol (which is about 113 octane) here, removing it will lower it for sure.
 

Sheldon

Active Member
Joined
Aug 10, 2008
Messages
1,050
Location
Battle Creek Mi.
What licence fees are you thinking of ?
plates for one.... here we pay a percentage of the vehicle value yearly, some states license fees can based differently and can easily run several hundred dollars.... plus some have safety inspections, emissions testing, all added on fees....

here is a thought so if you start with 97 octane premium (the hottest stuff you can currently find at the pump) and you remove the ethanol I wonder just what the final rating would be....
 

Obormot

Newbie
Joined
Sep 24, 2010
Messages
11
Location
Donetsk, Ukraine
here is a thought so if you start with 97 octane premium (the hottest stuff you can currently find at the pump) and you remove the ethanol I wonder just what the final rating would be....
lets make a proportion:

97 = 116 (OR of ethanol) * 15(%) + x (OR of gasoline) * 85 (%)
97 = 116*0.15 + x*0.85

x = 93.64

hm. not so small difference...

PS which standart of octane rating using in USA: RON, MON or AKI?
OR of ethanol is 129 by RON, 116 by MON and 122 by AKI
 
Last edited:
Top