I have read and been told many many times the right way to season cast iron. I have always used which ever vegetable oil I happen to have on hand to season mine but then I read this tutorial by Loving Our Guts and they tells us that the absolute best oil to use is flax oil. Very interesting and I will be trying it the next time I re-season my cast iron skillets.
Click here to read about The Best Cast Iron Seasoning Method: