Moly treatment added to synthetic oil or not?

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Joined
Apr 5, 2015
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I did a search but couldn't find a thread on doing a one time moly treatment to 4.7L Toyota engines. I change my oil and flter regularly at 5000 miles with 5w-30w synthetic oil at the Toyota dealership. Is that all I need to do? My 2000 LX470 has 256,000 miles running strong. I replace the timing chain, pulleys, etc at 100,000 mile intervals too.
 
Thanks!
 
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