The above UOA is mine. I can't post pdf files so I had Vetteman get it put up for me. As you can see, the car is a 99 Sentra 1.6L, auto transm. The oil is Schaeffer's 9000 5W-40. The first UOA was Schaeffers 5W-30 Blend. Second was Schaeffers 15W-40 Blend.
This interval includes a trip of 6,229 miles from my home in the east to Arizona and Utah. This little engine had a good work out and pulled those steep grades quite well. It included a lot of unpaved desert roads.
Pablo, the lead levels are what you see on the report for three UOAs. This is NOT the car that had a coolant leak.
This is a Blackstone/Dyson report and Terry has done a magnificent job of bringing me to to par on this report. I'd recommend his services to any who want more from their UOA reports.
This car gave me 36.62mpg on the 6,229 miles journey with this 5W-40 oil. Last year I got 34.95mpg on my 6,020 trip with the 15W-40. This oil isn't hurting me any.