The best is Mobil 1. Everyone else just try's to copy their formula. I have used it for years in a variety of cars. Two of them went over 300,000 miles when I sold them. They are still running with new Owner's
Mobil 1 full synthetic is the best you will usually find on the shelf or be able to afford. If you can get your hands on some royal purple than that stuff is the best, many track cars can't even make it a quarter mile without purple.
I have a 20 year old honda with 250k (had it since 100k) miles that doesn't lose a drop or even turn dark between changes, I've used mobile syn with mobile filters since I had it, previous owner took it to acura and used their fluids. I use penzoil syncromesh in the manual trans and never had a single problem with it besides the clutch, but that's because I burn it up driving like a mad man every day.