You'll have to have more than a couple of gallons #2 when winter sets in.
http://www.enertechlabs.com/Biofuels_Additives.htm

http://www.duffscience.com/bd_calculators.htm

I'm starting to think either the fuel is poor or your cleaning the fuel system and clogging up. Unless she's sucking air as already suggested.

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1999 E300DT (131,800) 154,000 Black on Black SOLD

2006 CLK 500 coupe Capri Blue on Grey (zoom,zoom)
47,000mi

04 VW TDI Passat 80,000mi
(Techno)

How to eliminate oil dependency through market-driven approaches.
“We could cut oil use in half by 2025, and by 2040, oil use could be zero,”
The Sound of Diesel Speed
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