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LRO Founder
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2,006 Posts
20/50.. sure that is what I use in my 4.2 but it never gets really cold here in California.. all depends on your climate....


Serg
 

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Premium Member
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16,594 Posts
The idea of using synthetic oil in your older engine is a little questionable, only because with all your older seals and gaskets you do stand a chance of a few new leaks. As for the engine it would help it by cleaning up alot of old gum and varnish.
Mike J.
 
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