So, I used to get, maybe 200 miles, giver or take a few from fill up to gas light trigger. Now I am getting 175 to 180 miles. I have changed out the air filter a couple times through this, a couple sets of tires from regular, to darkside and back to regular. I have around 55k on it. Is it a computer setting? Has anybody else seen this drop in mpg? It is not horrible, but it is a question to ponder.