How many pounds of soybeans make a gallon of vegtable oil?

About 53 lbs

1 bushel= 66 lbs, of that after crushing it makes about 11 lbs of soy oil (1.4 gal)which through transesterification produces 9.2 lbs (1.25 gal) of B100

also remember that after crushing 44 lbs from that same bushel is sold as feed for livestock.