A high volume Gas station. Try to make your purchases from just one Gas Station if possible, This practice will eliminate any other source of contamination if the gasoline is suspect and you are insured a product that was recently distilled from the distribution terminal.
All Gasoline (Petrol) contains small quantities of water, It is not an anhydrous compound, Hygroscopic in that it has a great affinity to absorb moisture. Gasoline typically contains 100-150 PPM water, Beyond that, Problems with an internal combustion engine will manifest, Not really a great concern since you are not flying an airplane.
Adding 8 oz of a 50/50 mixture of Isopropyl Alcohol/Toluene to a full tank of gasoline every 3/5k miles will help eliminate moisture in the fuel system and clean the injectors/Carburetor, Nothing else is needed.
Ethyl Alcohol with prolonged exposure to plastic fuel system components will compromise their integrity, This is especially true with early models. I am unsure of the effects it has on Oxygen sensors.
HTH
ATB Mike
This message has been edited by MikeSandy on Jul 5, 2009 2:11 PM
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