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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
The ethanol in the crappy E10 gas we use these days absorbs moisture out of the air in humid climates. Then it's carried through the fuel system and a cast iron euro fuel head will rust, mostly in the bottom areas of the fuel head like the bottom of the lower differential chambers where the water and ethanol mix falls out of the gas and collects. Water is heavier than gas and thats called phase seperation.

The ethanol is part of how they give E10 gasoline it's octane rating these days so as the ethanol mixes with moisture from humid air and seperates from the gasoline during phase seperation and corrodes internals of meachanical fuel injection systems like CIS the octane of the gas is dropping at the same time so engine damaging detonation can start happening at the same time.
Old 05-12-2013, 05:59 PM
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