Used Oil Analysis
Hi folks
Completed my first oil change as part of IMS Guardian install (some pics on my Rennlist thread). Was due in July for 12 month service so its been 10 months or 6000 kms since last change. Engine run exclusively on Mobil 1 from new and has done 109,000kms. Current grade is 5w 50. UOA is: Cu 23ppm Zn 817 P 709 Fe 8 Al 2 Cr 1 PQ 0 Main concern is Cu but Zn and P are lower than nominal (1100/1000). Have refilled with Fuchs Titan Supersyn 5w 40 and will check again in 6 months. Interested in your thoughts/ comparisons.http://986forum.com/forums/uploads01...1368826308.jpg |
At my fall oil change, with Mobil 5W50 my copper was at 7 and my Zinc and Phos. were at 1,669 and 1,196 respectively. Our Alum and iron number are similar. About 52,000 miles on the motor and 6,700 miles on that oil.
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Copper is high, but not stratospheric. I would just do another short interval oil change and check the copper.
Phosphorus and zinc are low, but those are anti wear additives which vary from oil brand to,oil brand. |
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Phil,
Do you know the particle size range that the lab's equipment can see? Many spectrometers can only see up to about 5 to 10 microns, and usually report in the up to 1-2 micron range. Hardened steel will flake off and cause ~15 micron (and larger) sized particles -- these would never be detected and reported (depending on the equipment). Regards, paul... |
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