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      06-23-2012, 09:42 PM   #23
tibra1
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Drives: 2011 ZCP M3 - 2007 335i crashd
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Quote:
Originally Posted by 767IJP View Post
Tibra? You guys in the states are your premium brands of gas (and high octanes), do they have ethanol added?
Unfortunatly we do 10% by volume ..its now a federal law or something ..there were a few stations that sold pure gas..but they have rapidly disappeared..

Ethanol has some advantages in that its an octane booster..but ethanol is extremely corrosive to plastics and polymers and it is also hygroscopic (tends to absorb water) and you know what happens when water and gas mix inside an engine..