2002 Silverado 5.3 AMSOIL 5w-20 6kmiles

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Just thought I would post this up for FYI stuff. I took a sample and sent one off to Dysonanalysis and to OA. Interesting to see the difference. On Dyson the one before this one was AMSOIL's SS 0w-20 and the one before that was ATM 10-30.

5w-20.UOA.jpg


5w-20uoa.jpg
 
Can I ask why you switched to a 20 weight oil after all this time? After that many miles on the engine, I would have moved from the likely recommended 5W30 to a 10W30 or even a 0W40 or 5W40 oil. Thanks for your response.
 
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Originally Posted by SteveG4
Can I ask why you switched to a 20 weight oil after all this time? After that many miles on the engine, I would have moved from the likely recommended 5W30 to a 10W30 or even a 0W40 or 5W40 oil. Thanks for your response.


I wanted to see what effect it would have on engine wear. My mpg didn't change that is for sure. LOL
 
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