PU 5w30 2008 Silverado 6.0L L76 9,074 miles on oil

Messages
136
Location
Virginia, USA
OLM was at 19%. Filter was NAPA Gold 7060. Filter dissection is here. For those unfamiliar with the L76 V8, it is the same 6.0L aluminum block V8 used in the Pontiac G8 GT. Blackstone Comments: Thanks for the notes on the new radiator with an integrated oil cooler. That could be why copper (brass/bronze parts) and lead were a bit higher than universal averages, which show typical wear for this type of GM engine after about 7,000 miles of oil use. Lead might also show some bearing wear, or it could just be a temporary particle streak too. In any case, we'll look for it to come down some next time. No contamination was found and the viscosity was in the proper range. A TBN of 3.2 shows lots of active additive left. Try 10,000 miles next time.
Code:
MI on Oil			9,074				
MI on Unit 			125,974
Sample Date			06/15/14
Make Up Oil Added		.5 quarts
Oil Type		Pennzoil Ultra SN 5w30

				Universal Avgs
ALUMINUM		3		4
CHROMIUM		1		1
IRON			11		23
COPPER			53		48
LEAD			18		8
TIN			0		1
MOLYBDENUM		56		73
NICKEL			1		1
MANGANESE		1		1
SILVER			0		0
TITANIUM		2		2
POTASSIUM		2		2
BORON			33		51
SILICON			5		10
SODIUM			4		37
CALCIUM			2113		2009
MAGNESIUM		29		335
PHOSPHORUS		659		738
ZINC			808		865
BARIUM			0		0

SUS Viscosity @ 210°F	58.8
cSt Viscosity @ 100°C	9.88
Flashpoint in °F	410
Fuel %			<0.5
Antifreeze %		0.0
Water %			0.0
Insolubles		0.1
TBN			3.2
I'm not worried about the copper and the lead due to the installation of the new radiator with integral oil cooler. Guessing the lead is from solder. Next UOA will tell. The NAPA Gold filter did a fine job.
 
Messages
1,429
Location
quebec canada
If your pickup work a bit you love that cooler .it doesnt sound like much but its a very good investement .ps: is the oil the old style ultra or the pureplus version?
 

Bookmaker

Thread starter
Messages
136
Location
Virginia, USA
This is the old style Ultra. I bought enough of it (28 jugs) at $6.50/jug (after FRN rebate) to last several years. Current fill is 10w30 Ultra. I'm running the 5w20 in my Challenger. The truck was built with an oil cooler in the radiator. The radiator cracked last winter and I replaced it myself with a new one from GM. The truck has done some heavy hauling and has never complained.
 
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