AC Delco UPF63 after 5k with 25% EC30

4wd

$50 site donor 2026
Joined
Sep 21, 2010
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Texas/Other via IAH
2017 Tahoe. The EC30 was mixed in Quaker State Full Synthetic 0W20 …
Most of the oil used in this 5.3L was Mobil 1 Annual Protection 0W20 (70% PAO) purchased for $15/jug at AZ clearances … (ran out) … nothing past OLM limit …
I looked inside many pleats - all just like what I spread for pic …
ADV was pliable …
This change was at 90k:
In/on: Valvoline Restore and Protect 5W30 + TG10575

IMG_9951.jpeg


IMG_9952.jpeg
 
Mobil 1 very good oxidation resistance and ANs should keep an engine very clean. I also didn't notice any carbon in my filter with my run of HPL. Current 5w30 EP shows it's a PAO/GTL oil, likely with AN.
 
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That filter & oil look clean for the mileage. It will be interesting what the Valvoline Restore and Protect does for your Tahoe.
 
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