Hahaha. I honestly can say that, on a carbureted O-470 that spends the vast majority of its time above 6000’ MSL, because... home airport elevation potato... and cruises around 9000’ typically.
We have long term (almost ten years, wow! - a few of those before I joined the airplane co-ownership) numbers on it too, but we always burn more on trips to visit y’all lowlanders.
As far as the cost numbers on a 182 go, there’s significant but not huge changes in operating costs between the O-470s and the restarts, and definitely a big jump in fuel costs in the T182T, so one has to define which 182 one is talking about. And the R182 is a whole different animal, too.
And of course, acquisition costs are hugely different between all of the models, even inside of the carb’d O-470 years, if you go all the way back to the early straight tails and Johnson Bar flap models, or all the way up to the lawyers and liability cost laden R models through the T182T.
So, what kind of 182 is the OP looking for?