Join Date: May 2008
Location: Portland Oregon
There is a flex fuel station really close to my house. I went to fuel it up, and they told me three stories of bikers filling up on it, and going, NOWHERE LOL.
For the fun of it, I decided to try it anyways. I filled it up, started it, and knew that I had about a block and a half before I would use up the old fuel in the float bowl, and that is how it worked out, and I had to run the choke almost full on to get it to the house. This stuff runs like a 300 octane fuel.
Before my last engine upgrade, I had a lot of pinging due to carbon biuld up, so I started using the flex fuel to bump up my octane and eliminate the ping, and it works great. The hotter it is outside, the higher the ratio of flex fuel. I have experimented with all of the ratios starting with 5 to 1. That is 5 parts of regular, and 1 part flex. The highest mix that still allowed the bike to run decent, I did in 100 degree heat, and that mix was 60/40, again, the regular fuel is the 60. The flex runs really cold, it works great as an octane booster, and it is really cheap.
But I wouldn't let it sit in your tank and fuel system over the Winter. It definately has corrosive properties on non-flex fuel vehicles, but not running it straight seems to be a no issue. After a summer of running it, I tore down the carb to look at corrosion evidence, and there was none.