From a chemical point of view, oil composition modifies due to oxigen, water vapour and unburned petrol.
Every lubricant in an opened bottle or in the oil sump is daily exposed to oxigen, so it walks to an expiration date that is common set in not more than 2 years (chemically speaking) and every short trip you make with the car, short as the oil does not warm (less than 15min or 7-8miles) water vapour and unburned fuel will condense in the sump and will remain there, carrying the lubricant to an acid PH and starting the oil parts decomposition. More than the synthetic basis, I mean the anti-foam, the anti-sludge, the detergent, the anti-corrosive and other additives mixed in lubricants.
If your dealer set the Oil Control System to ON, your instrument panel should say how many days miss to the oil change: the count down starts from 360 immediately after the reset, then decreases by days or by hard work condition, where hard condition (as reported in your user manual) are high speed trips but also short trips in low temperature condition. My Jazz, for instance, shows 80 days in the count down even if they should be 230; this because of my holidays, 4000km in Sicily and in highway at high speed.
So should be better to change your oil as set by the manufacturer, better, oil and other liquids as cooling and brake fluid.