I'm not totally convinced the automatics are more economical. There are 3 cars currently at our house. 2016 1.2 petrol manual, 2013 2.0 diesel manual, and 2021

I'm not totally convinced the automatics are more economical. There are 3 cars currently at our house. 2016 1.2 petrol manual, 2013 2.0 diesel manual, and 2021 1.0 petrol automatic. The 2013 car would consistently get 5 ish mpg better than the 2016 car, and that one would consistently get 5-10mpg better than the automatic