deckheight Posted February 2, 2009 Report Share Posted February 2, 2009 My Banshee motor is set-up very close to the edge as far as requiring 100 octane gasoline... Four weeks max with a fresh leaded fuel and the gas goes into something else that is not so sensitive. I don't use unleaded gas or a "gasahol" blend in the Banshee, but if I did, it would be two weeks max. Old fuel and 2-strokes don't mix IMHO. been there, done that Gasoline can be stored for long periods of time before it actually goes bad by gumming or varnishing, however the octane level or rating or whatever it's called starts deteriorating almost immediately after blending. Quote Link to comment Share on other sites More sharing options...
desertdeweller Posted February 2, 2009 Report Share Posted February 2, 2009 I just had a class on this a few months back engine failure analyist. What they said is a lot of 2 cycle oils come with a stabalizer in it already. gas in plastic cans especially see through deteriorates the fastest due to sun light penetration. If left in the sun actually starts deteriorating in a few days also lose more fuel due to permiation {spelling}. Fuel in plastic containers left in doors should be used with in a few weeks a month to 1/12 with stabilizer in it. They said with out a stabilizer it could lose 10% of its octane in the first few weeks. They brought in some weedeaters for us to blow up one had the cooling system completely wrapped in plastic wrap, another ran with out 2 stroke oil, another with bad gas, and other with various problems air leaks etc. They had us put down times on how long it would take each machine to blow up. The plastic wrapped one was the fastest went into detonation at 8 min completely seized in 13min. I got to operate the one with bad gas it was second quick at 14 min 35 sec. I tore it apart all rings were stuck, stunk to high hell bad scoring in he cylinders. The next in line was no 2 cycle oil it lasted 15 min and 20 sec. after pulling it apart it was determined that it lasted longer than expected for a couple of reason. 1. it had already been run for a while previously so it had some residule 2 cycle left in the bottom of the case. The top end already had some clearance because of the time on it, and didn`t allow friction to build as fast. 3 the carb was also running rich and gas has some lubrication properties to it. so old gas you can lose octane as well as lubrication properties. granted the fuel I ran in that thing was about a year old. They showed the problems of cheap gas and quality gas it was pretty significant over time.They even showed some of their failures in 2 cycle oil it was a prety cool class. sorry about the book. Quote Link to comment Share on other sites More sharing options...
sandman Posted February 3, 2009 Report Share Posted February 3, 2009 I've been dealing with the dilema of what to do with old 2 stroke gas as I have a bike that only knows sand & has never seen dirt which sucks when you live several hours from the sand. Then one day it occurred to me! Buy a "dirt banshee". Now I run that gas through the dirt bike and all is well! It's just another excuse to go riding & do my part to pollute the environment. :biggrin: Quote Link to comment Share on other sites More sharing options...
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