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Corvette
General Corvette Discussion
Ethanol a problem or ?????
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<blockquote data-quote="Music" data-source="post: 262115" data-attributes="member: 7765"><p>At the time that the fuel switched over the midgrade & regular blends to E10 ethanol I immediately started noticing major amounts of condensation under the oil cap.</p><p></p><p>This is particularly a problem during the winter months as it has a tendancy to freeze after the car has shut off, causing damage to components in the cylinder heads. The premium blend from CO-OP did not produce any condensation and the engine oil and coolant ran at about 5degC higher operating temperature.</p><p></p><p>However, nowadays the only station in some small cities offering a non-ethanol fuel is CO-OP and that just isn`t practical as far as supply goes. </p><p></p><p>Regarding small engines and ethanol, I had the same results after storage with either using ethanol or non ethanol fuel prior. . . The following season the snowblower would not start. After localizing the issue to gas starvation by removing the plug and adding some fuel into the cylinder prior to starting, a teardown of the carburertor yielded a bowl of blackened gas in addition to a caked up jet. The jet appears to be made of brass (which is 75% copper) and the cake inside the jet appears to be greenish white (copper sulfate). Presumably the oxidation was catalyzed by the fuels, but this I ruled is a design flaw as it concerns the metallurgy of the jet. Note that I also have a Briggs & Stratton lawnmower that never had this problem once in 30+ years with the same gas.</p></blockquote><p></p>
[QUOTE="Music, post: 262115, member: 7765"] At the time that the fuel switched over the midgrade & regular blends to E10 ethanol I immediately started noticing major amounts of condensation under the oil cap. This is particularly a problem during the winter months as it has a tendancy to freeze after the car has shut off, causing damage to components in the cylinder heads. The premium blend from CO-OP did not produce any condensation and the engine oil and coolant ran at about 5degC higher operating temperature. However, nowadays the only station in some small cities offering a non-ethanol fuel is CO-OP and that just isn`t practical as far as supply goes. Regarding small engines and ethanol, I had the same results after storage with either using ethanol or non ethanol fuel prior. . . The following season the snowblower would not start. After localizing the issue to gas starvation by removing the plug and adding some fuel into the cylinder prior to starting, a teardown of the carburertor yielded a bowl of blackened gas in addition to a caked up jet. The jet appears to be made of brass (which is 75% copper) and the cake inside the jet appears to be greenish white (copper sulfate). Presumably the oxidation was catalyzed by the fuels, but this I ruled is a design flaw as it concerns the metallurgy of the jet. Note that I also have a Briggs & Stratton lawnmower that never had this problem once in 30+ years with the same gas. [/QUOTE]
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Corvette
General Corvette Discussion
Ethanol a problem or ?????
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