2004 GM 1500 5.3L Castrol GTX 10W30 4167 Miles

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Here is a friends truck that drives an immense amount of highway miles pulling a 2 ton utility trailer. He's part of the SSO crowd now.
2004 Chevy 1500 5.3 V8]Photobucket[/url]
 
That's pretty low miles - I have over double on my '03 5.3L.

Silicon is nice & low.

Holy smokes - the sodium is somewhat high...
 
Yeah he just put it into work service 2 months ago and slapped 10,000 miles on since that point! He had already spent way too much money on quick lube oil changes so I got him hooked up with a flush, SSO and an EAO. As far as the sodium goes I have never seen a VOA for this oil in bulk form, but I figured with the EL coolant I would have saw potassium right up there too if it were a leak.
 
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