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Old 10-07-2011, 09:41 AM   #9
85Bowtie
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Re: What's the best oil for a old tired engine?

Quote:
Originally Posted by S10Fan View Post
From what I've read, zinc has been removed from most all oil, including Rotella. I use regular branded oil and add ZDDP with each oil change.
No, they just have lower concentrations of zinc. Diesel oil still has higher zinc concentrations even after the use of catalytic converters on diesels.
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