Well, for starters, there are soooo many cars running around with 300,000+ kilometres (190,000miles), mine included that have never run synthetic engine oil a day in their life and still run strong. I pulled my engine down just for piece of mind when I bought the car just because of the mileage and was surprised to find the original cross hatched pattern, still etched into the cylinder walls. New rings and bearings and I never looked back. I'm not saying that synthetic oil is garbage, but it has yet to be proven to be superior to conventional oil in everyday driving....regardless of all of the mock tests synthetic oil companies have conducted. Not to mention certain additives used in synthetic oils have been know to harden rubber/silicon gaskets and seals over the years causing leaks. I’m a firm believer in regular oil changes instead of expensive oil changes. $50.00 for an oil change seems crazy to me.

Even if there were any possible way of proving there were advantages of using synthetic oil over conventional oil. I’d rather spend 1/10 of the money on a rebuild after 15-years of driving, then flush $50.00 every time I changed my oil.
Not downing anyone who chooses to run snake oil, but I’ll spend my money on things that I know will actually work and will notice when I use them. An extra $30.00 per oil change over 5 or 10 years, buys an awful lot of aftermarket parts. But hey….spend your own money how you will, my opinion isn't the final word.