Zealot06

Hey all. I have a 2002 Z06 with 74,400 miles. I just changed my oil and sent a sample (my third one) to Blacksone Labs. The oil (Mobil 1 with a Mobil filter) had 4910 miles on it.

To keep this brief, my previous sample was nearly perfect. This time the iron and silicon content jumped as follows:

Iron: From 19 to 27 ppm
Silicon: From 9 to 53 ppm

I think the reason the silicon content increased is because I let the air filter go too long. I have remedied that by replacing it.

I suspect that the main reason the iron took a jump may be due to the increased "dirt" in the oil as evidenced by the silicon. This past winter, I replaced my valve springs with PAC1218s. Is it possible that the springs could be shedding a little material as they settle in? I don't know what they are made of.

Blackstone thinks that the silicon may be a "harmless sealer", since my other metals aside from the iron are all low.

What to you folks think? Thanks in advance for your input!

~STOLEN~

this is way over my head lol , so im here for the free information

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PeteZ06

Just curious.. What sort of container did you use to send the sample in?

Zealot06

Brand new, unused, Blackstone-supplied sampling kit. I have sent many of these to Blackstone for aviation-related oil samples, and also to other analysis labs.

Zealot06

A friendly bump…doesn't anyone else here have experience with this?

MY03C5Z

I have never had any of my cars oil sent for testing. I see this topic discussed a bit in c5 gen, might try asking over there for more responses.

dhowdy

I just changed my valve springs and will be getting the next sample tested.... you'll have to wait until January or February but I can post results (less mileage between changes although lots of autocross passes so it does get run hard for short periods).