Glad you are happy with your new Emeril Fryer
I bought the Waring Pro Professional grade fryer last year for 150 bucks and it was worth every penny. Only thing it dont have id the built in filteration system.
As for them saying to only use vegetable oil they dont want you to use Lard and animal fats of such types . Vegetable oils = olive, corn, peanut , canola, etc... will be fine.
Good luck and happy frying!