I would go easy on him...I can see how someone would make that error. Though you are are correct, I don’t think he DID check...:)
I did go easy, I deleted most of the text I originally wrote.
In truth, last time I personally checked anything on a Prius it was the oil, but that was while ago.
My ex biz partner bought a couple as company cars when the green incentives were running hot. Really disliked mine so I have not really followed the Prius world. The newer Teslas are really impressive and am actually seriously considering one as my next personal car.