As promised, here is my Blackstone report. Hand typed, don't know how to post the actual report.
Specifics:
Car - 2008 Cadillac CTS with the Direct Inj. 3.6 V6
Miles on car - 9,483
Miles on Oil - 6,544
Oil used - Mobil 1 5W/30 (regular, not EP)
Oil filter - STP (cartridge type)
Oil life monitor reported 54% life left.
Here are Blackstone's Comments:
Don't be alarmed by the highlighted numbers in the first sample from your CTS. The excess
wear is due to new parts breaking-in, while silicon is from sand-casted parts and sealers used when
assembling your engine. Both should improve with subsequent oil changes. Universal averages are based
on an oil run of ~4,500 miles. The TBN read 3.5 so you still had some active additive left. 1.0 is low. We
don't suggest running your oil much more than 6K miles until wear looks better, as excess wear metals
make oil abrasive. Everything should look better next time.
Here are the numbers: (aluminum, iron, copper and silicon were highlighted)
aluminum - 7
chromium - 1
iron - 52
copper - 28
lead -2
tin - 0
moly - 100
nickel - 0
manganese - 4
silver - 0
titanium - 0
potassium - 3
boron - 47
silicon - 26
sodium - 8
calcium - 2173
magnesium - 15
phosphorus - 645
zinc - 907
barium - 0
SUS Viscosity @210F degrees=56.6 (should be 55-62)
cSt Viscosity @100C degrees=9.23 (should be 8.8-11.1)
Flashpoint = 385 (should be 365+)
fuel % = 0.5 (should be less than 2.0)
antifreeze = 0 (should be 0)
water = 0 (should be 0)
insolubles = 0.3 (should be less thsn 0.6)
TBN = 3.5 (1.0 is too low)
Based on this report, I will run this oil between 5-6000 miles to dump more break in residue out and run another UOA. I've always ran 5-6k mile oil change intervals but I am really trying to extend my runs as hard as it sometimes is for me! I think my best plan would be 7500 miles max. The OLM would have me going nearly 13,000 miles. Too far for me.
Specifics:
Car - 2008 Cadillac CTS with the Direct Inj. 3.6 V6
Miles on car - 9,483
Miles on Oil - 6,544
Oil used - Mobil 1 5W/30 (regular, not EP)
Oil filter - STP (cartridge type)
Oil life monitor reported 54% life left.
Here are Blackstone's Comments:
Don't be alarmed by the highlighted numbers in the first sample from your CTS. The excess
wear is due to new parts breaking-in, while silicon is from sand-casted parts and sealers used when
assembling your engine. Both should improve with subsequent oil changes. Universal averages are based
on an oil run of ~4,500 miles. The TBN read 3.5 so you still had some active additive left. 1.0 is low. We
don't suggest running your oil much more than 6K miles until wear looks better, as excess wear metals
make oil abrasive. Everything should look better next time.
Here are the numbers: (aluminum, iron, copper and silicon were highlighted)
aluminum - 7
chromium - 1
iron - 52
copper - 28
lead -2
tin - 0
moly - 100
nickel - 0
manganese - 4
silver - 0
titanium - 0
potassium - 3
boron - 47
silicon - 26
sodium - 8
calcium - 2173
magnesium - 15
phosphorus - 645
zinc - 907
barium - 0
SUS Viscosity @210F degrees=56.6 (should be 55-62)
cSt Viscosity @100C degrees=9.23 (should be 8.8-11.1)
Flashpoint = 385 (should be 365+)
fuel % = 0.5 (should be less than 2.0)
antifreeze = 0 (should be 0)
water = 0 (should be 0)
insolubles = 0.3 (should be less thsn 0.6)
TBN = 3.5 (1.0 is too low)
Based on this report, I will run this oil between 5-6000 miles to dump more break in residue out and run another UOA. I've always ran 5-6k mile oil change intervals but I am really trying to extend my runs as hard as it sometimes is for me! I think my best plan would be 7500 miles max. The OLM would have me going nearly 13,000 miles. Too far for me.
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