Why do the Diamond DA-42 and DA-62 have a minimum fuel temperature requirement? On the turbo diesel DA-42 and DA-62 aircraft there exists a minimum fuel temperature limitation where you may not start or operate the aircraft below that.  Does anybody know why this is?  It seems strange as the turbo Diesel engines themselves have their own dedicated engine fuel pumps which raise the pressure of the fuel to 19,500 psi prior to infection in the cylinders.  This should make the fuel plenty hot for combustion.

Is this minimum fuel temperature requirement typical for all reciprocating Diesel engines?
From the DA-42 TDI Approved Flight Manual:

Fuel filter is not heated and can clog if the Diesel fuel flocculates. Jet fuel does not pose same limitations.