As promised here is the second ever sample on my 87 4Runner, original sample was unknown 5w30 which apparently not all of it came out during the drain as it lowered the vis of the 20w50 out of spec. Total vehicle mileage was 260,000 at the time. This was before the valve job and new camshaft done about 17,000 later. I have 2 more samples with 20w50 I'll post next. No idea why it didn't like the previous fill of 5w30 as the wear numbers were terrible by comparison and this prompted me to not use 5w30 for another 4+ years. That sample is already posted and had good results.