Quote:
Here is an url to a site with a scan of the service bulletin:
http://www.clublexus.com/forums/showpost.php?p=2058532&postcount=33
There is a huge thread there where people discussed it. Apparently many of them had already been running it in Lexus vehicles with 1MZ-FE engines so I had assumed from that, the logic in the above post and some other stuff that it was safe. Reading over the actual Toyota Service Bulletin again, it seems that they are not authorizing it on 2006 vehicles that originally used 5W-30 motor oil and only on the ones that they shipped with 5W-20 motor oil. Given that I misread it, I am probably wrong about being able to use 5W-20 in my Avalon's engine. Please correct me if I am mistaken.
