Consumer Reports recently tested various car waxes. The winner, at 69 points, was:

Meguiar's NXT Generation Tech Wax 2.0 G12718 for $18+ http://tinyurl.com/6s5ltyx

The runner up, and CR Best Buy, was:

Nu Finish NF-76 http://tinyurl.com/7jl4rue

I've been using the stuff in the orange bottle on boats, cars, trucks, and campers for a long time.
Works well, and the price is definitely right!