Any quality motor oil will work well in a modern engine. It doesn't have to be synthetic and it doesn't have to be Mobil 1 or Pennzoil.

I use synthetic because I like the look of a sludge-free engine when I remove the valve cover. My personal experience has been that using synthetic oil results in a physically cleaner-looking engine, internally. The sludge that shows up when you use conventional oil...I have no idea if it's good or bad...but I don't like how it looks. I found a way to prevent it...synthetic oil.

I've used Valvoline SynPower, Castrol Syntec, and Mobil 1 over the years in several cars. All of them performed similarly and all of them took my cars well over 100,000 miles with clean engines.

To sum up my post...any good quality oil will work for you...change it often and use a quality filter. There's no major-brand oil on the market today that is "bad" for your engine as long as it's the correct viscosity and bears all the required ratings for your vehicle.