Just got my latest analysis back on my Crosstrek. This is the first time running Mobil 1 ESP 0W-30. Previous reports were running Schaeffer 9000 0W-20, but it became hard for me to obtain. I've heard great things about the ESP on here but I'm not sure I like it. Subaru calls for 0W-20 SN or SP rated I believe, but I thought I'd try the 0W-30 ESP, which doesn't carry that rating. I'm not liking the high oxidation and low TBN at such a low OCI. Any thoughts on this or should I be concerned? I've been keeping my OCIs short due all along due to the fuel dilution and will continue to do so. Wear metals otherwise seem very good other than a little AL increase, but it is not flagged. I also sent the same oil sample to Blackstone but they take about two weeks longer than Horizon to report back. I sent one to Blackstone because I wanted a particle count test done. Horizon won't do it on used engine oil. I'm testing different oil filters on the car. I'm going to go out on a limb and say that Blackstone's fuel dilution number will be much lower than Horizons and unfortunately they don't test for oxidation or TBN for free like Horizon does so I won't see that on the Blackstone report. Should I switch back to the 0W-20 or keep running the ESP 0W-30, which I have a bunch of? I will post up a comparison of the Horizon and Blackstone reports once Blackstone gets around to doing my sample.
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