Do following things: Wheel alignment for both front and rear wheels, change tires if found worn out, fill all tires with 32 Psi air, use standard size tires 195/65/15R or 185/65/15R, use 5W/30 engine oil, change spark plugs and clean throttle body, change gear/transmission oil with original recommended Honda oil, Check tires free rotation to see the brakes pads are fully disengaged when brakes are not applied, Remove any extra or excessive weight from car, remove and clean the fuel injectors, adjust the exhaust and intake tappets, change air filter. Fill the fuel tank up to half with Hi Octane when fuel needle comes to lowest mark. Drive the car wit Hi octane till fuel needle again comes to lowest mark. This will help to clean fuel injectors. Repeat this procedure after every 3 months. Finally switch OFF the engine on long signal lights. Flush the engine with Liqui Moly engine flush by adding it and drive the car for 50 KM and then drain old oil. Repeat this procedure after two months and use 5w/30 engine oil.