The high silicon average I concluded was contributed to me not having air cleaner lid securely attached. I added a new air filter at 90,000 miles but didn't notice the lid wasn't fully secured until I did my 95,000 mile service. Didn't think anything of it until UOA. My bust... Very pleased with this truck since new.
![[Linked Image]](https://www.bobistheoilguy.com/forums/attachments/usergals/2020/02/full-83916-41206-taco_oa_02022020.jpg)
![[Linked Image]](https://www.bobistheoilguy.com/forums/attachments/usergals/2020/02/full-83916-41206-taco_oa_02022020.jpg)
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