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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

 
 
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Old 09-02-2011, 08:42 AM
cn90 cn90 is offline
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Location: Omaha NE
 
Join Date: Mar 2006
Posts: 12,852
Mein Auto: 1998 528i 5-sp 140K+
10% Ethanol Gasoline: Yes or No?

I read somewhere on the internet that 10% ethanol can be harmful to the fuel delivery system in any cars, but the evidence is anecdotal and I am not convinced that 10% ethanol is bad.

Does anyone have any hard evidence (preferably scientific study) that says 10% Ethanol is bad for the seals etc.?

All of my cars at home have been running on 10% Ethanol gas for the last 10-14 years, zero issues (or maybe I don't know yet). In 95% of the time, I pump 89 Octane (with 10% Ethanol in there).

Any Ethanol expert here?
Well, everyone is an expert on the internet LOL (j/k).
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