5w-20 oil has much more technology invested in it. It will get you better gas mileage and slight better performance as without much worry.
well according to the testing I have researched. Synthetic is also better for the car and its been proven. I use 5w-30 mobile 1 synthetic but if i can find a decent deal on Amsoil 5w-20, i'll get it..it is probably the best oil out there for our cars. Synthetic oils you can change every 5,000 miles without worrying