I change the oil once per year around the end of September, start of October. Here is this years report, in typical fashion this car only sees around 4,000kms per year so there is no real chance of depletion or issues to note. The car has a number of bolt on and flex-fuel upgrades and sees higher boost and about an extra 80-90whp more than a stock STI. This may be my last UOA on this car since I finally got the "perfect report"!
When I started getting UOAs in 2017 the iron levels were abnormally high, they have since become normal and there is nothing else to note and the reports have gotten pretty boring. Plus I have ran through all the brands of oil that I plan on using. I have a few years worth of Mobil1 Euro 0w40 and don't think I will learn anything else.
If nothing else these can be used as comparative "almost virgin" oil analysis of the big brand (labelled below) 40 weight oils
When I started getting UOAs in 2017 the iron levels were abnormally high, they have since become normal and there is nothing else to note and the reports have gotten pretty boring. Plus I have ran through all the brands of oil that I plan on using. I have a few years worth of Mobil1 Euro 0w40 and don't think I will learn anything else.
If nothing else these can be used as comparative "almost virgin" oil analysis of the big brand (labelled below) 40 weight oils