Mike,
I have used BD since 2005. I have put it in 3 Cummins Dodges, a Jeep Liberty and a Ford tractor. With the tractor I found that it took about 6-7 months for any problems with hoses to set in.
Also, with the wife's Jeep Liberty I found that if I blended greater than B40 the fuel pump would lose prime after shutting down the engine for about 1/2 hour. Fortunately, that pump has a manual pump built-in and you just have to go under the hood and pump it a few times to reprime it. (Imagine trying to explain that to the wife when she called to report that the engine would not start!). We found if we stayed to B20 - B30 then there is no problem and that is what we still are doing. It must be a viscosity related thing and the check valve in the pump must bleed off if the fuel is too thin. Not knowing anything about fuel injection pumps, that is my knee-jerk explanation of the problem.
I have a friend who converted his commercial van to WVO and it worked well until the winter when the fuel lines would clog up. It may have been a installation design error with not enough insulation, etc., but it became a real problem and I think for the winter months he stays with petro-diesel.
BTW, BD gels around 40 degrees. I add AMSOIL Cold Flow additive to bring it down about another 20 degrees. Have never had a gel related problem that I know of.