I was browsing youtube to listen to some exhausts for my 2011 wrx 5door and I ran into a video of a guy who claimed to be getting 33mpg highway with just a muffler delete, gutted downpipe and a stage 2 tune. If I really baby my stock wrx, I can get 23 mpg at the most on 91 octane. This seems very low to me. Is there something wrong with my car or the mpg calculator? How many mpgs are you guys getting, interested in various stages of tuning.