Lard! Canola oil and crisco be damned! Stick with good old lard!
That is what my grandmother used.....so I do too. Pure lard.
The secret is to put just enough of a coating on that it renders and goes into the pores, and wiping off the excess so that it doesn't get rancid if stored for long periods without use.
I have some of her skillets that are 60+ years old and they have better non-stick surfaces than the best teflon pans.
And, like Frank said, soap is a no-no....unless you are planning to re-season.
Solus, the one you linked to is like the one I have. Made with the lip around the lid for top-coals style cooking.