View single post by subwoofer
 Posted: 03-27-2015 08:34 am
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Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
I'm not a carb expert, but as far as I can tell a lower viscosity oil in the carbs will shorten the acceleration enrichment period. The purpose of the oil is to slow (and dampen, probably) the venturi piston movement when airflow is increased, thus temporarily creating a larger vacuum and higher fuel flow.

I don't know how large this effect would be in practice and if it would be noticeable, I am just pondering on the theory of operation.