The timing belt on a f22 engine replacement interval is 90k miles, not 60k, and or 72 months. Get that replaced along with the water pump, balance shaft belt, and seals. For mileage make sure the o2 sensor is good along with the cat, make sure the air filter is clean, the ignition timing is set at 15-16 degrees BTDC (Before Top Dead Center), and check your tires to make sure they have enough psi, I go with 32 psi for the tire size that comes stock with your car, and make sure the fuel system is maintained.