MPG decision....sell or keep?

Great thread and funny also.I bought a 2007 Corrolla new. Used it as a commuter car for about five years until my younger son got his license. He drove it for about six years. When he graduated college he bought a new car of his own so I got it back, Still runs great with 175K on it. Besides four spark plugs and a welding job on the exhaust all other routine stuff like tires and brakes. No rattles or hiccups. Only the A/C needs recharge. Thats why I have three vehicles on the road, I can't bring myself to sell the best car I ever owned.