you can always benefit from switching over to synthetic.
You gain the most from doing it sooner in life.
Due to the synthetic lower visicosity, if you have any leaks, you'll really notice them later.
True that about the leaks.. It had no leaks at all then I switched to Mobil 1 5w30 when I bought the car and my valve cover gaskets started leaking. But I did notice a night and day difference with the synthetic oil :thumbsup: