Today, drivers are keeping their vehicles longer than ever before. The average car on the road is more than seven years old and has more than 75,000 miles on it. Also, today's new car engines are designed to increase fuel economy and improve emission controls, which puts more stress than ever on motor oils. Synthetic lubricants, when compared to conventional motor oils, offer critical performance benefits, including:
Better protection in low temperatures, enabling easier and faster start-ups in cold weather (as low as -40 degrees F);
Enhanced high-temperature durability, reducing oxidation and wear on critical engine parts (up to 400 degrees F);
Reduced oil consumption under high-speed conditions;
Better performance under heavy engine loads/stresses, such as hauling and towing;
Increased stability and better control of deposits that can impede flow and lead to higher wear.
But Knowing All this I still use regular engine oil...... maybe I just like to stick to the tradition. I even had someone told me that synthetic oil breaks down just as fast as regular engine oil. I guess what I want to say is just because people are using it doesn't mean you got to copy them. Well hope that helps.