Originally Posted by TIM
Use XD 50 Only ........
Of course people who run highly tuned racing engines are also wrong are they? Do you think Evinrude MAKE this oil? It's made by someone like Castrol in the first place!!!
Why do you think these engines run at something like 100:1 ratios? It is for one reason only - to get the star ratings to keep the environmentalists happy - it's NOT done for the sake of the engine!!!
If Evinrude have marked TCW3 on the side of the engine it will run on it fine - you will just use a bit more.
My Suzuki 225 efi 2 stroke also varies the oil ratio in use - according to the book it can go to 150:1 in certain usage - it works fine on the semi synthetic Rock Oil I am running.