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      12-03-2012, 03:56 PM   #1
EastCoast335i
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Drives: 335i E92
Join Date: Sep 2007
Location: NJ

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E85 & 93oct Mixture?

So I've been running e85 (approx e35 mixture) for the past month or so.

My question is in regards to mixing the two fuel types.

Since e85 is about 33% lighter or less dense then regular fuel how does it act in your fuel tank?

Let say your car has been sitting for a few days/weeks, etc... does the regular gas settle to the bottom and the e85 rise to the top? (separation to some extent)

If it does, would that mean towards the bottom of your tank (close to E) you'd be running a higher concentration of e85?