Rysium: I did not notice the date on the post ..just clicked on and read it. I do think the big Da 150,s do not cost that much to run on pump gas. If you tried that size of engine on acohol ...it would burn far more being the fuel to air ratio is about 6-1 and gas is about 13-14 to 1 ratio. Even if the cost of acohol was less ....the fact is you need twice as mutch to make the same flight. OH.... The Sorry thing...never gave it a tought. Just kinda wondering about the mileage. I could be way off on my assumption....I never owned a DA 150. Too much$$$ for my type of fun. Playing with engines is my real fun...then flying. PS. Like they say " Your mileage may vary" Best Regards Capt,n