Since he does not post on his website it should be assumed to be hypothetical or simulated trading per the standard disclosure. I would hope he clarifies it publicly for his students sake.
If he did with real money I commend him. Do you have a link that represents that feat was accomplished with real money? I don't even ask for proof in the form of broker statement. Typically the cftc views omission of real money trading claims by educators as being hypothetical or simulator...
It's just like grains, trades at different prices in different markets, grades and delivery points. While bids for grains are transparent at local buyers, elevators, etc. I don't think it is so with oil for the lay person.