My gas mileage gauge keeps changing readings. I have been driving it the same for a while: steady as she goes. I don't have a job right now, so I can't afford to tear around and waste gas.
Normally it shows my average at around 19 mpg. Yesterday, with no change in driving, it dropped to 15.6 If I wanted Jeep fuel economy I would have gotten a Jeep or the FJ Cruiser. What's going on with my car? I change the oil pretty regularly, I change the air filter almost every time I do the oil (I look at it first to see if I need to), my tires are at the right pressure, and I use 93 octane gas. What's going on?