This is the UOA that I mentioned in a previous thread in "Car and Truck Gas Engine Oil" forum. This is from Blackstone, with TBN.
BTW - This is NOT my car.
The car has 67,000 miles, and the oil has 26,000 miles with no make up oil. The oil barely registered on the dipstick, and I estimate it was at least 2 quarts low, possibly 3 (I don't have much experience with the oil reading less than 1 qt low). The last oil change was a Jiffy Lube, so what ever brands they use is likely the brand, but I would guess that the oil is Dino. Also, please not that this is NOT my car.
Here are the numbers:
ALUMINUM 13
CHROMIUM 3
IRON 345
COPPER 13
LEAD 0
TIN 0
MOLYBDENUM 16
NICKEL 3
MANGANESE 4
SILVER 0
TITANIUM 0
POTASSIUM 2
BORON 5
SILICON 65
SODIUM 5
CALCIUM 2006
MAGNESIUM 21
PHOSPHORUS 684
ZINC 841
BARIUM 13
The comments were as follows:
So, the big question is: To what degree has the life of this engine been shortened?
Your comments on this UOA are appreciated.
P.S. This is NOT my car. I would not do this to a perfectly good automobile.
[ October 24, 2003, 07:00 PM: Message edited by: DockHoliday ]
BTW - This is NOT my car.
The car has 67,000 miles, and the oil has 26,000 miles with no make up oil. The oil barely registered on the dipstick, and I estimate it was at least 2 quarts low, possibly 3 (I don't have much experience with the oil reading less than 1 qt low). The last oil change was a Jiffy Lube, so what ever brands they use is likely the brand, but I would guess that the oil is Dino. Also, please not that this is NOT my car.
Here are the numbers:
ALUMINUM 13
CHROMIUM 3
IRON 345
COPPER 13
LEAD 0
TIN 0
MOLYBDENUM 16
NICKEL 3
MANGANESE 4
SILVER 0
TITANIUM 0
POTASSIUM 2
BORON 5
SILICON 65
SODIUM 5
CALCIUM 2006
MAGNESIUM 21
PHOSPHORUS 684
ZINC 841
BARIUM 13
The comments were as follows:
I must say, this is all much better than I expected. I actually spoke with the tech at Blackstone, and he indicated that once oil reaches a certain point, the wear goes up exponentially, and that this oil was probably just past that point. I guess I caught my neighbor just in time (this is NOT my car).quote:
Wear in this sample was high, though considering how long the oil was run, we are not ready to call any of these results a problem. Universal averages show typical wear from this type of engine after 5,000-6,000 miles on the oil. Silicon was high and may show dirt getting past he air filter, which would have caused the excess wear. The viscosity was high for a 5W/30, but still in the 30W range.
The TBN read 0.0, showing no active additive left. The long use didn't kill this engine though it did not do it any favors either. Suggest resampling in 5,000 miles to monitor iron.
So, the big question is: To what degree has the life of this engine been shortened?
Your comments on this UOA are appreciated.
P.S. This is NOT my car. I would not do this to a perfectly good automobile.
[ October 24, 2003, 07:00 PM: Message edited by: DockHoliday ]