"says it gets good mileage (yeah 19/25)"
I hear that sometimes, too. They say,'It gets good mileage, about 23mpg!' They have no idea.
I took a long trip in a rented Nissan XTerra last winter. It had AWD, big+thick roof rack, large snow tires, auto tranny, and the big V6. I drove through one whole tank all on the freeway at 65 mph and got 23 mpg. When I drove 70 mph, freeway only, it got 17mpg, and I could feel the torque converter unlock frequently.
I didn't dare try 75mph.