One of the best I've used is Bilt Hamber Auto foam.
https://www.bilthamber.com/car-clean...sing/auto-foam
It doesn't "foam" as much as some but it's great at cleaning - which is what I buy it for
I use it with a normal garden sprayer at 4%. Really easy to workout the % and you'll need maybe 2-3 litres for a 75.