Dont have the 19s but I am curious as well. I weighed the stock 2019 OEM 17s with tires and they were 49lbs.
I added 20 inch asanti ABL-13 with 255/45/20 tires and they weighed in at 59 lbs.
So far MPG hasnt changed much at all. Just finishing my second tank and its still roughly the same.