My first oil analysis. The sample was taken with a sample pump at ~98,100 miles, with about 8100 miles on the oil. I always change the oil sometime around the 10,000 mile mark. I've used mostly Castrol 505.01 (TXT and SLX), Motul 505.01 for one interval, and Castrol 507 for one interval. The oil used for this sample is Castrol SLX 5w30. Can anyone give any feedback about the Nitration results? What can I do about it? I tried doing a search for a few hours about what I can do about it, or what causes, but didn't have any luck. Is that level bad? The only reason I changed the oil at 8100 miles is because I bought and installed a DieselGeek bypass filter and switched to Mobil1 TDT. The oil analysis process was definitely easy enough. I'll be sure to do this regularly.