Without doubt the preferred lube of fisters. It may take a little while to get lubed up and warm, but then whilst its in it's more solid state what better time than to start pushing loads of Crisco into the arse ready for a long play session.
Quite often used first to line the arse with an oil based lube and then move on to water based lubes: Aqueous or j-lube.
With the inner lining nicely coated and in effect waterproofed with an oil based lube, the water based lubes last much longer and to greater effect as there's no natural absorption by the body.