I posted this tip on the Ar. and Ms. board also... I was a over the road food grade tanker driver before I retired, and one of the things I hauled was vegetable oil.
I delivered to a company east of Nashville, Tn. that bottled the oil for different companies. High price and cheaper brands are all the same oils, except wesson, crisco and maybe one or two more that I can't remember.
So save yourself money, and buy the cheapest price vegetable oil on shelf, it's all the same...