With the stand up holder your turkey can stand say 16-18 inches tall
in the pot, which means a lot more oil, much closer to the top of the
pan. With the basket you can take the same turkey, use much less oil
and have a much greater buffer from the surface of the oil, to the top
of the pot. DISCLAIMER!! You must however make sure your turkey is
tilted up enough so there are no closed air pockets in the cavity. I
lay it over on its back, and neck down, and split up the belly a bit
to make sure it is good and open. In my rig, a 13 pound turkey sits at
about a 45degree angle, perfect..
If you use the stand up rack they provide with say a 13 lb turkey, you
might need as much as 4- 4.5 gallons of oil to cover it all the way
up, leaving you only scant inches between the top of the pan, and the
oil level while cooking. If you tilt over the same turkey, you can use
slightly over 3 gallons, and have a good 8-10 inches from oil to top,
while cooking.... This has been my exerience.