Below are the results of a VOA conducted on a sample of Mobil 1 5w-50 taken in October of 2010. I used this oil on my 2007 Porsche Cayman S that sees quite a bit of track duty (~10% of total miles); I wanted to be sure this oil had the right goodies to protect under track conditions.
My Observations: Zn & P were a little lower than spec'd by Mobil 1 in the PDF comparison page available on their website ( LINK ). They claim 1000(P) and 1100(Zn); my sample showed appx 900/1000.
Other than that the oil looks pretty good. I'll also post the UOA on this oil after 2250 miles; 550 of which were under track conditions.
Blackstone Comments: This sample of virgin 5w-50 oil had a normal viscosity. No moisture was found and only a trace amounts of insolubles was present in the sample. Traces of insolubles are becoming more common in new oils. They merely show light oil oxidation and won't pose a problem. The dominant additive is calcium, which is a detergent and dispersant additive. Boron and magnesium are the same type of additives, while moly, phosphorus, and zinc are anti-wear additives. Silicon at 7ppm is also an additive, to prevent foaming.
Aluminum - 0
Chromium - 0
Iron - 3
Copper - 0
Lead - 0
Tin - 0
Molybdenum - 99
Nickel, Manganese, Silver, Titanium - 0
Potassium - 1
Boron - 202
Silicon - 7
Sodium - 5
Calcium - 2923
Magnesium- 14
Phosphorus - 866
Zinc - 992
Barium - 0
SUS Visc. @ 210F = 87.1 (Range: 70-90)
cSt Visc. @ 100C = 17.28 (Range: 12.9-18.2)
Flashpoint (F) = 445 (F)
My Observations: Zn & P were a little lower than spec'd by Mobil 1 in the PDF comparison page available on their website ( LINK ). They claim 1000(P) and 1100(Zn); my sample showed appx 900/1000.
Other than that the oil looks pretty good. I'll also post the UOA on this oil after 2250 miles; 550 of which were under track conditions.
Blackstone Comments: This sample of virgin 5w-50 oil had a normal viscosity. No moisture was found and only a trace amounts of insolubles was present in the sample. Traces of insolubles are becoming more common in new oils. They merely show light oil oxidation and won't pose a problem. The dominant additive is calcium, which is a detergent and dispersant additive. Boron and magnesium are the same type of additives, while moly, phosphorus, and zinc are anti-wear additives. Silicon at 7ppm is also an additive, to prevent foaming.
Aluminum - 0
Chromium - 0
Iron - 3
Copper - 0
Lead - 0
Tin - 0
Molybdenum - 99
Nickel, Manganese, Silver, Titanium - 0
Potassium - 1
Boron - 202
Silicon - 7
Sodium - 5
Calcium - 2923
Magnesium- 14
Phosphorus - 866
Zinc - 992
Barium - 0
SUS Visc. @ 210F = 87.1 (Range: 70-90)
cSt Visc. @ 100C = 17.28 (Range: 12.9-18.2)
Flashpoint (F) = 445 (F)