2005 Chevrolet Express - 4.8 liter V8, 4 speed auto, rear wheel drive, 3/4 ton (2500). Ran Amsoil 0w30 for 12,125 miles (19,399 km's - I'm Canadian, eh - from about 85,000 km's to almost 105,000 kms). Van has Amsoil ATF in the transmission and Amsoil 75w90 Long Life Gear lube in the Rear Differential with at the time a stock paper air filter. Ran the oil from September of '08 to September of '09. This oil went through not only one of Vancouvers coldest Winters in many, many years, but also one of our hottest Summers we've seen as well. This van sees about 80-90% city driving, and lots of this is in stop n go traffic, some of it on windy hills up to high end houses in the British Properties of West Vancouver. Sent the sample to blackstone and I am quite frankly blown away by the results. Used an Amsoil EaO32 oil filter. Previous oil changes were Amsoil 0w30, and before that a few oil changes of Mobil 1 5w30 synthetic. Before that, conventional oil, so basically synthetic oil from about 55,000 km's on.
Aluminum - 2
Chromium - 1
Iron - 16
Copper - 16
Lead - 22
Tin - 0
Molybdenum - 12
Nickel - 1
Manganese - 1
Silver - 0
Titanium - 0
Potassium - 3
Boron - 15
Silicon - 13
Sodium - 9
Calcium - 2964
Magnesium - 11
Phosphorus - 546
Zinc - 613
Barium - 0
SUS Viscoscity @ 210 fahrenheit - 60.9
cST Viscoscity @ 100 Celsius - 10.46
Flashpoint in F - 430
Fuel - Antifreeze% 0.0
Water% 0.0
Insolubles % 0.3
TBN - 2.5
There comments: "For an oil run one year and nearly 20,000 km, this one looks pretty good. Universal averages show typical wear levels for this type of engine after about 8000 km's on the oil. As you can see, all wear except lead read around [these] averages, even though you've gone much longer on the oil. It's hard to say why lead is high; it may be from a particule streak through the bearings, which is temporary, or it could be some bearing wear. Oil filtration is excellent (see insolubles). Silicon shows good air filtration. No coolant/fuel found. Try 25k (25,000) km's next time. Nice engine."
I would like to point out that I think the reason for the high (compared to averaes) lead was because the place I had my oil changed at at some point previous helicoiled the oil drain plug without telling me, and that probably forced some shavings into the crankcase which caused a particle streak more then likely.
The most amazing thing about this oil is when I had it changed, you can't tell you have new oil in it, it runs good all the time.
Aluminum - 2
Chromium - 1
Iron - 16
Copper - 16
Lead - 22
Tin - 0
Molybdenum - 12
Nickel - 1
Manganese - 1
Silver - 0
Titanium - 0
Potassium - 3
Boron - 15
Silicon - 13
Sodium - 9
Calcium - 2964
Magnesium - 11
Phosphorus - 546
Zinc - 613
Barium - 0
SUS Viscoscity @ 210 fahrenheit - 60.9
cST Viscoscity @ 100 Celsius - 10.46
Flashpoint in F - 430
Fuel - Antifreeze% 0.0
Water% 0.0
Insolubles % 0.3
TBN - 2.5
There comments: "For an oil run one year and nearly 20,000 km, this one looks pretty good. Universal averages show typical wear levels for this type of engine after about 8000 km's on the oil. As you can see, all wear except lead read around [these] averages, even though you've gone much longer on the oil. It's hard to say why lead is high; it may be from a particule streak through the bearings, which is temporary, or it could be some bearing wear. Oil filtration is excellent (see insolubles). Silicon shows good air filtration. No coolant/fuel found. Try 25k (25,000) km's next time. Nice engine."
I would like to point out that I think the reason for the high (compared to averaes) lead was because the place I had my oil changed at at some point previous helicoiled the oil drain plug without telling me, and that probably forced some shavings into the crankcase which caused a particle streak more then likely.
The most amazing thing about this oil is when I had it changed, you can't tell you have new oil in it, it runs good all the time.
