I have got a 2022 Chevrolet pickup, 600 HP, customized 10.5 MPG brand new. With the CAPS, I was able to get from Premium to Regular gas (that already saves me over $1 per gallon right there!) and I am getting over 22 MPG driving from TX to Mississippi!
On my Harley Davidson too and Semi Truck, 3500 or more miles per week, and that is 1 less tank full of fuel ($700 to $800 savings a week average savings for a trucker)