Got my second UOA report back today. First UOA run was this one in May '08, after having some mechanical problems and running an extended OCI: http://www.bobistheoilguy.com/forums/ubb...rue#Post1159905 As you can see, not great results. As that post says, I changed that oil for Petro-Canada 'Maximum' 5W-30, which I ended up running 8096 miles, and NOT analyzing. In Nov. '08, I changed it out for this oil. During both the PC run and this one, I used no additives in the gas or oil. I also added no top-up oil. 2002 Chevrolet Cavalier, 2.2 OHV 123,827 miles on unit (198123 km) Motomaster Formula 1 dino 5W-30 Motomaster Formula 1 oil filter (Fram TG clone) 4.4 litre initial fill, no top-up oil, 0.8 liter consumption 8018 miles on oil (12,830 km) Iron 20 Chrome 1 Moly 47 Alum. 3 Copper 3 Lead 8 Tin 1 Titanium 0 Nickle 0 Silver 0 Silicon 15 Sodium 17 Potassium 2 Zinc 656 Magnesium 15 Phos. 653 Barium 0 Soot 0 Sulf. 32 Oxid. 24 Nitrat. 16 100C visc - 9.01 TBN - 1.5 Anti-freeze, fuel, water all 0 Lab comments just said that nitration was high, and may be due to running interval too long. My thoughts? I'm thrilled with these results, lot better than I thought they would be. This run was during the 'Ottawa bus strike' during the winter, so LOTS of idling and low-speed operation in freezing cold weather. Looks like I ran this oil just to the right point! All comments are welcome!