Re: 79 C10 Oil Viscosity for older 350 Engine

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Posted by ErnieDD on January 01, 2007 at 13:37:20 from (66.67.123.220):

In Reply to: 79 C10 Oil Viscosity for older 350 Engine posted by 1951RTU on December 31, 2006 at 16:18:09:

Had one for 9 years. At that period of time the camshafts were ground flat, and high revs on cold oil would take out a cam. Always used valvoline 10w30. No problem other than the cam. New cam got rid of the dead throttle repsonse from 1/3 to 1/2 throttle. 10/40 has a boat load of viscosity modifier which does not last real well.

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