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  1. Macsignals

    2003 Subaru Outback EZ30, Napa 5W30 Hi-Mileage Synblend, 4417 miles

    Analysis for my new-to-me daily driver. 2003 Subaru Outback LL Bean, EZ30 H6. Napa 5W30 High-Mileage Synthetic blend. Supertech ST9688 filter. No change in oil level throughout the interval. Ran for 4174 miles and looking at the TBN I'm glad that's all I ran it. Used this oil twice for runs...
  2. Macsignals

    2016 Sierra, 5.3L L83, ACDelco Full syn 0W-20, 5528 miles

    Here's a Blackstone UOA on my GMC Sierra with the 5.3L L83 V8. 39,237 miles on the truck. Was a free oil change from the dealer, full synthetic ACDelco 0W20 was used with a PF63E oil filter. I added half a quart of Valvoline 0W20 around 3000 miles on the oil change. This was mostly used for...
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