Here's the latest UOA on my WRX. Oil is Redline 5w30, OCI was 7,250 miles. Filter is an OEM Tokyo Roki AA100 with filter magnet.
I've switched to OAI for my UOAs, when you include KV40 and TBN testing they're much cheaper than Blackstone. Comments are equally worthless though. I've stopped doing the particle counts, they just didn't seem very useful. Maybe I'll do another one when I switch to the Purolator Synthetic filter.
The report is flagged as "severe" for oxidation, but this recent VOA of Redline 5w30 shows virgin oxidation of 108, meaning my sample is likely within the margin of error.
The oil actually thickened slightly with use, but maintained it's VI quite well.
Overall I'm very pleased with the report, I'm going to stick to Redline 5w30 at 5k-7.5k intervals. I'm very slightly concerned about the thickening and possible copper corrosion, but not enough to switch oil. I do consider M1 0w40 from time to time though. Current filter is my last AA100.
Enjoy.
I've switched to OAI for my UOAs, when you include KV40 and TBN testing they're much cheaper than Blackstone. Comments are equally worthless though. I've stopped doing the particle counts, they just didn't seem very useful. Maybe I'll do another one when I switch to the Purolator Synthetic filter.
The report is flagged as "severe" for oxidation, but this recent VOA of Redline 5w30 shows virgin oxidation of 108, meaning my sample is likely within the margin of error.
The oil actually thickened slightly with use, but maintained it's VI quite well.
Overall I'm very pleased with the report, I'm going to stick to Redline 5w30 at 5k-7.5k intervals. I'm very slightly concerned about the thickening and possible copper corrosion, but not enough to switch oil. I do consider M1 0w40 from time to time though. Current filter is my last AA100.
Enjoy.