I know that some engines are rated for it some are not. I tend to stick with what the manufacturer recommends for the engine I have.
My guess is that some bio fuels are processed better and kept dryer than others. The good ones are probably fine in any engine and the engines rated for biofuel are more tolerant due to extra equipment and/or tuning. It may also depend on how long you leave it in the tank and the climate in your area if it is hydroscopic.
I have a friend that went in big on biodiesel for about a year then decided that he could buy a lot of diesel fuel for what the new Cummins cost him. Your results may vary.
