Kerosene used to work as an anti-gel before diesel fuel changed to low-sulfur. From the studies I've read it no longer works. It never worked to prevent ice crystals but did work as an anti-gel.
I've used the white-bottle Power Service for 20 years and have had zero problems. The price on it has gotten ridiculous though. Here in New York even our heating oil is now low-sulfur. I have outside tanks and never opt for the 50/50 mix offered for winter use. I use Power Service (white) in all my trucks, tractors, and in the heating oil. We've had temps down to 20 below F and other then a few plugged filters - all has been fine. I will admit though that when temps are below zero - I choose to use gas engines when possible. I've had more problems with my propane freezing up at the regulator - then with diesel. For that I have to use an ethanol injector.