I had the oil in this car tested at Wearcheck Canada (www.wearcheck.ca) and was stunned when the TBN came back at 7.93 after 7000KM. I emailed the lab asking about a possible error in the TBN testing, and was duly ignored. Nice customer service, eh.
Here is a link to that report.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1245733&fpart=1
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I drew another sample about 1000km later and sent it to Blackstone. The TBN came back at 3.2 Huge difference between the two labs, but I'm guessing Blackstone is probably more accurate.
Here's what Blackstone had to say
You've run 8,000 km on this oil and wear is reading nicely, with just copper a bit high. 2.5% of the sample was diesel fuel, which is enough to show a possible fuel system problem. If you have to idle the engine a lot, maybe it is operational in nature. More on this next sample. Go on up to 10,000 km for the next sample. Watch for any signs of a fuel system problem. TBN - 3.2 - Okay.
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They say 2.5% DIESEL fuel, but this must be a typo or something. The car isn't diesel. In fact I see they've listed my engine as a GM 6.6 litre Duramax - it's not, but I'm fairly sure this is my oil sample (and not someone's GM Duramax) as the copper was high in the Wearcheck report as well.
Any ideas on why the high fuel? Could that be causing the high copper? Thanks.
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Blackstone
Aluminum 3
Chromium 1
Iron 6
Copper 32
Lead 1
Tin 0
Moly 39
Nickel 0
Maganese 1
Silver 0
Titanium 0
Potassium 0
Boron 37
Silicon 13
Sodium 5
Calcium 2588
Magnesium 12
Phosphorus 642
Zinc 820
Barium 0
SUS Viscosity @ 210°F 57.8
cSt Viscosity @ 100°C 9.58
Flashpoint in °F 385
Fuel % 2.5
Antifreeze % 0
Insolubles 0.4
TBN 3.2
Here is a link to that report.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1245733&fpart=1
------------------------------------------------------
I drew another sample about 1000km later and sent it to Blackstone. The TBN came back at 3.2 Huge difference between the two labs, but I'm guessing Blackstone is probably more accurate.
Here's what Blackstone had to say
You've run 8,000 km on this oil and wear is reading nicely, with just copper a bit high. 2.5% of the sample was diesel fuel, which is enough to show a possible fuel system problem. If you have to idle the engine a lot, maybe it is operational in nature. More on this next sample. Go on up to 10,000 km for the next sample. Watch for any signs of a fuel system problem. TBN - 3.2 - Okay.
-------------------------------------------------------------
They say 2.5% DIESEL fuel, but this must be a typo or something. The car isn't diesel. In fact I see they've listed my engine as a GM 6.6 litre Duramax - it's not, but I'm fairly sure this is my oil sample (and not someone's GM Duramax) as the copper was high in the Wearcheck report as well.
Any ideas on why the high fuel? Could that be causing the high copper? Thanks.
-------------------------------------------------------------
Blackstone
Aluminum 3
Chromium 1
Iron 6
Copper 32
Lead 1
Tin 0
Moly 39
Nickel 0
Maganese 1
Silver 0
Titanium 0
Potassium 0
Boron 37
Silicon 13
Sodium 5
Calcium 2588
Magnesium 12
Phosphorus 642
Zinc 820
Barium 0
SUS Viscosity @ 210°F 57.8
cSt Viscosity @ 100°C 9.58
Flashpoint in °F 385
Fuel % 2.5
Antifreeze % 0
Insolubles 0.4
TBN 3.2
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