November 30, 201114 yr For the older gens that have difficulty passing DEQ. I was a little skeptical of GeneralDisorders suggestion to add Denatured Alcohol to the gas tank... I failed DEQ CO2 with an allowed 1%, I got 1.0549% After the treatment... I passed with 0.0000% Its about 1 gallon of gas per 1 gallon of denatured alcohol (available at Home Depot) I used 1/3 of a tank of gas in a 1990 Legacy L... and 1 gallon 3 quarts of the alcohol... Sometimes the cars will run like crap, but will pass... Im not sure if you could pass Cali standards like this. My car didnt run like crap, had a little chug at idle a few times, but never dropped that low and pulled through all gears on some back roads, so I didnt see a loss in power... Worked... Thanks Rick! (and credit to whoever suggested it to him)
November 30, 201114 yr Author On mine, I think it was slightly less alcohol per gallon of gas... The gauge was about 1/3 of the way full and I added first 3 quarts, drove hard a few times around the block (normal city block) and didnt notice it running weird or losing power, so I added the gallon size DA and drove around for about 15 miles, hard and sucking fuel, then sat in line... didnt notice any power drops but the idle was a little shaky at times (dropped below 1K on the RPM gauge for a split second a few times)
November 30, 201114 yr It's about a 4:1 ratio. 1 gallon of alcohol to each 4 gallons of gas. You can go higher if you need to in order to pass. Don't leave the stuff in there without diluting it - it will eat your fuel system just like E85 will. Percentages up to about 1/3 are safe for the short term. It's worked on every car I've used it on. GD
December 1, 201114 yr It's about a 4:1 ratio. 1 gallon of alcohol to each 4 gallons of gas. You can go higher if you need to in order to pass. Don't leave the stuff in there without diluting it - it will eat your fuel system just like E85 will. Percentages up to about 1/3 are safe for the short term. It's worked on every car I've used it on. GD +1 I did it recently with an '84 wagon and passed with flying colors. The car did run really well in the first place, so don't expect to do this with a pos and expect it to pass...though it could happen. I just ran the tank down to about 1/3 and poured in a gallon of denatured alcohol. It definitely affected my fuel filter and vapor separator. I filled the tank immediately afterward and changed out the fuel filter and vapor separator.
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