Originally Posted by bob4256
Did a quick google search.....is that airplane fuel??
Yes, it is. Used in recip engined aircraft.
I wouldn't use 100LL, especially in a high compression, direct injection engine. Pressures and heat are already considerable in those. 100LL runs pretty hot. Aircraft engines are typically low compression. When I was a pilot and was constantly around airports I used to fill up my bikes and old mustangs with 100LL. One of my bikes designed to be run on leaded gas would have a small gasket leak anytime I used unleaded. When it had avgas in it, it wouldn't have the leak at all. Just as engines that were designed to use leaded gas started having problems with unleaded fuels, mainly valve seating problems, the engines designed to have unleaded fuel could have problems using low lead.
They now have to design engines not only to run on unleaded gas, but it is absolute crap. Ethanol mixtures determined by regional and state laws has only made gas worse over the years. Ethanol is a horrible product which turns foamy and nasty in a car. Left in a tank it will accumulate water and ruin old metal tanks. It gunks injectors and decreases fuel efficiency. feel good naer- do- wells think they are doing good for the environment, but in reality the offset of decreased efficiency thus increase in fuel consumption only increases pollutants in the end. End of rant.