Best way to get 1-2" lift on 15 sportwagen

I think the all track has a 1" taller ride height maybe looking for something like that. How does the all track get the taller height? Different suspension? Mine has corny 16" wheels now. Would I see much of a fuel economy drop off by doing to 18"'s with 60 sidewalls, would it rub? VW vortex has a good writeup on changing wheel size on mk7 tdi, they said going to 20's took highway economy from 47 (18") to 42 (20") in their tests

Best way to get 1-2" lift on 15 sportwagen