There are many opinions on this subject. Mine is that a good quality full synthetic will give the best protection when the motor is running. If you have your sled in storage alot of the time, I think the blue would give better corrosion protection. I use poo gold myself, but use a good fogging spray for storage to help for corrosion. I doubt that you would notice the difference, as far as the ves goes, the valves need to be cleaned fairly often anyway for optimum performance.
