Even in today's high performance vehicles, people are forced to use regular unleaded fuel, regardless of manufacturer recommendations, due to escalating costs. Your car will get from point A to point B on regular fuel; however, your upper cylinder, valve seals and guides will take a beating and suffer premature wear. This further reduces the service life and performance of your vehicle. Those of us that live in areas that require emission testing may discover that failures may occur in as little as 30,000 miles, due to this excessive wear.
