Hi
That is not a new problem and not limited to Bio Diesel. For many years a lot of the 18 wheelers have a heat exchanger installed in the fuel system to keep the diesel fuel warm in cold weather.
When we were in the Dakotas in 2010 some of the fuel station had 2 types of diesel, #2 and #1 the #1 is a dehydrated fuel that tolerates the cold much better than #2.
Phil P
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2009 Montana 3665RE
2009 Duramax 3500 DRW quad cab
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