i'd do some blending with #2 when it gets cool. you don't want thick fuel. the poor fuel spray pattern may cause fuel dilution in the motor oil.
the b99 has much more lubricity than the current #2.
if you do the research, b99 has a very narrow flash point, burn lite off temp. where #2 starts at 170'f and the heavier portions of the fuel won't light off until the flame gets over 1000'f. part of the reason #2 starts a bit easier when its cool out. b99 has a flash point near 750'f and full burn is around 890'f. this is second hand info, so i'm most likely wrong about the numbers, but the general idea is correct.
cc

sorry about the numbers, i missed a key on the bio flash point it should of been 275' this is from a couple of second hand sources...