I want to jump in on this post because I know a little bit about fuels... The clean air act of 1990 says ,,, 10% alcohol MAnDITORY within 100 miles of a metropolitan city of 1 million or more>>>>> Since then,,,about 90% of thr fuel that you buy contains ALCOHOL!!!!! Alcohol is HORRIBLE on a 2 stroke motor.... Regular unleaded burns at approximately 18,000 BTU's and Alcohol burns at about 6000 BTU's Considering an internal combustion engine is NOTHING MORE THAN A HEAT PUMP,,,,,Alcohol is doing about the same thing that "smog" or AIR pumps did in the 1970's.. Sure the emissions are lessened,,,,, maybe because you are squirting AIR into the exhaust,,, DUH!!!!!!! That MTBE thing was a fiasco from the start!!!!!!!!!! Its about as smart as burning HYDROGEN PROXIDE... (do you remember the "pocket rocket" car of the 1970's?????) it was an Hydrogen peroxide rocket car... They BLASTED it down the dragstrip and POISIONED ALL THE SPECTATORS!!!!! Not to mention the chemical burns on their hands and faces!!!!!! There is a fuel called 100 low lead, it is available at ANY AIRPORT across the nation... Some BIG cities like Chicago/ O hare airport, wont sell it to you because of the terrorist crap going on now,,, but,, it is still available if you talk NICE to the guy at the airport!!!!! 100ll has no alcohol and it is designed for off road use only,,,, so,,, you CAN use it in a snowmobile and NOT in you MOMMYS MINIVAN!!!! ALCOHOL EATS emollients in RUBBER!!!! turning it into RUBBER DIRT!!!!!! Not to mention the moisture absorbtion rate and specific gravity of Alcohol..... A little bit of 2 stroke oil in the gas tank every fill up MAY HELP!!!!!!! CASTOR BEAN OIL will improve it dramatically,,, but,,,castor beans do NOT mix well with other oils!!!!!!! Unless you burn 100 low lead,,, there isn't much you can do!!!!! Gary Oles nosboy