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.
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.
Thanks, good data. Looks like I'm being short changed on Zn. Your Zn level is double mine and were using the same brand/grade of oil. Mobil 1 gets the big thumbs down from me. I dont think that variability is acceptable at $20/L. Pleased I changed brand but need more data to know if its the right choice.
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).
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...
Thanks, interesting comment. I'll give the lab a call and find out. The filter was clean and there was no particles visible in the sump or the oil pan so I'm hoping shes clean
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