I would think in MI winter you are going to need some fuel heating. even with a blend, i bet the engine and pump will appreciate the heat
i run 12v injector heaters, I let them heat a few minutes in the cold before starting the engine to thin out any WVO in the injection lines. When left on for a few minutes they get very hot, not sure how hot the WVO gets inside, but I've been running this way for years, no major problems, with good glow plugs the cars fire up even in the cold no problem.
I also use a 12v heater pad on the spin on filter to let that preheat as well.got it from mcmaster carr, i think its like 2"x7" pad with 2 wires coming out of it, draws 100 watts i think. it helps A LOT with fats in the WVO not clogging the filter. i used to have to change the filter more often because fats would solidify in the winter, and changing the filter would always do the trick, but with the filter heater, its not an issue anymore. I have both 12v heaters hooked up to switches on the dash so that I can control them on/off if needed. I don't run the filter heater in warmer temps in los angeles.
I also run a coolant heated FPHE so when the engine/wvo gets to temp, i switch off the filter heater, but I always leave the injection line heaters on. have been running this way for over 50k miles on straight 100% WVO.
the key i have found is to filter the WVO REALLY well, and dewater, the better the WVO, the better the car runs and probably lasts...