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Old 01-29-2013, 07:10 PM
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Originally Posted by ap72 View Post
Instead of swapping out all the oil just add a qt of 60w first and see what happens.

and yes, 10psi per 1000rpm when hot.
Ive been meaning to change it for a few weeks, might as well do it now.
Originally Posted by Jake_Dragon View Post
20w40 in the summer and I have great oil pressure. 50000 miles later I am still running the same oil and have the same oil pressure.
Thanks. I was gonna try 10w40 with some w60 mixed in and a zinc additive for the flat tappet.
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