2015 civic r18 sedan

Hey all, first time poster here and it seems my problem is incredibly unique. I've been scouring for any info on someone who has had this issue but am not finding much. The car runs great, I just noticed it was not getting as good gas mileage as it should, (maxing out at maybe 29mpg highway...

First time posting: been kinda researching and reading for the last week. hope you all are doing well and this is still an active site. I was on procivic and looking at 3 different coilovers and didn't see a thread for non-si civics for coil-overs. For the 2015 Honda Civic EX-L they have 3 that...