2005 Silverado Amsoil XL 5W30, 7070 miles

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Not bad but not great. I had similar results from SM/GF-4 $.59 Chevron conventional in a Silverado 4.8 at just about the same OCI.
 
Originally Posted By: cronk
How long was this oil in service?
Wear numbers look good but TBN dropped off.


Oil was in for 11 months.
Iron jumped up quite a bit but I don't think it is anything to worry about. New formula is in now and I will see how it holds up.
 
Originally Posted By: 4WD
So it’s considered a one year/12k oil … is it really $9/quart?


$6.30 a quart.
 
Your iron has been jumping all over the place!
Copper, lead and aluminum all look really nice with this run!

Anxious to see how the new formula does, keep us posted!
 
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