FWW I have used GRO for the forst 12 months with little to no noise. I then tried a round of fuchs silkolene gear oil - some noise. Now I'm on the Amsoil 4T 10W40/50? and its horrible. The clutch makes noise as soon as its under stress. I think I'll go back to the GRO as its worked wonders. I didn't mind the GRO in the engine either. Burnt really clean with minimal smoke or spooge. I'm also finding the Amsoil Donimator nice on the engine too though so will stick with it. I like the red premix! Reminds me its been mixed.
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