M1 5w30, 8352 miles, 2005 Corvette

[Patman]

Here are the latest results from my 2005 Corvette, analysis done by Wearcheck Canada:


8,352 miles on oil
Oct 27, 2013 to Sept 1, 2015 (22 months)
72,619 total miles
Mobil 1 5w30
Fram Ultra oil filter
5.2L oil capacity
500ml make up oil
Oil life at 25%


Iron 15
Lead 12
Aluminum 3.7
Copper 59
Chromium 1.6
Nickel 0.3
Titanium 0.1
Tin 0.6
Silver 0

Silicon 13
Potassium 2.9
Sodium 7.1

Moly 75
Boron 43
Barium 0
Calcium 1053
Magnesium 727


Phosphorus 655
Zinc 770

Oxidation 75%
Nitration 65%
Sulfation 69%

Soot 0
Glycol 0
Water 0
Fuel 0

Viscosity at 100c 10.5


First of all, I have to say that I'm once again impressed with the service I got from Wearcheck. I did this oil change this morning, dropped the sample off at the lab just before noon hour and they emailed me my results before dinner time!

I went almost two years on this oil and it didn't look too bad at all really. A lot of Corvette guys stick to a one year interval even if they've only done 3 or 4000 miles and I decided before I put the car away in the fall of 2014 that with the oil life monitor well above 50% and less than 4000 miles on the oil at that time, that it was too soon to drain the oil and decided to push it one more driving season. No harm no foul, IMO.

 

[Dirty_Howie]

Why is your copper so high.

Please look at my UAO just posted:
http://www.bobistheoilguy.com/forums/ubb...w30#Post3843373



DH

 

[Patman]

A lot of LSx engines show a high copper reading on the UOAs, but it's not a cause for concern. My previous Corvette (a 98) showed low copper levels though, so I'm not sure why some show high and others don't, but I'm not really worried as long as the other numbers look fine (and I think they do)

 

[Ramblejam]

delete.

 

[CT8]

That has been an awesome wearing engine through out the engines life.