Have not used them on a 182, but I know of one that has them. I have used VG's on 3 Cessna's, 2 - 180's and a 185. Flew all of them before and after. Honestly, for me, I wouldn't put them on again. We kept trying, just looking for that magic, I guess. Never really noticed improvement like they make on a cub, at least in my opinion. I cannot see where they would be any different on a 182. That $1200 bucks or whatever it is will buy a lot of gas.
Of course, these opinions are worth what you pay for them.
gb