Posted by oldtanker on June 15, 2014 at 16:31:30 from (66.228.255.183):
In Reply to: E85 revisited.... posted by Tom Schnitzler on June 15, 2014 at 15:36:32:
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Tom, modern gas engines with low compression compared to yesteryear, are running 10:1 or 10.5:1 ratios. Some high output engines from the late 60's ran as high as 11:1 on pump gas. But back in the day 99 octane was available at the pump. The higher the octane the higher the flash point. And if it were true about melting pistons because of the BTUs you couldn't run a diesel at all. They run something like 16:1 and diesel has a higher BTU rating than gas. 147,000 BTUs. Making it about twice a efficient as ethanol and a little more than 1/4 efficient than gas.
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