This is not my WRX, the uoa was posted on nasioc.com:
Stock car, OEM air filter, Purolator Pure one oil filter, lots of stop and go driving during the daily commute. M1 5W-30 went in again.
Miles on oil: 4,900
Miles on motor: 70,700
Element Value (Universal Average)
ALUMINUM 2 (3)
CHROMIUM 0 (1)
IRON 6 (8)
COPPER 18 (5)
LEAD 5 (5)
TIN 0 (1)
MOLYBDENUM 87 (73)
NICKEL 0 (0)
MANGANESE 0 (1)
SILVER 0 (0)
TITANIUM 0 (0)
POTASSIUM 1 (1)
BORON 40 (65)
SILICON 13 (9)
SODIUM 6 (8)
CALCIUM 2552 (2401)
MAGNESIUM 14 (113)
PHOSPHORUS 636 (730)
ZINC 830 (870)
BARIUM 0 (0)
Property Value (Should Be)
SUS Viscosity @ 210F 57.6 (55-62)
cSt Viscosity @ 100C 9.54 (8.8-11.1)
Flashpoint F 375 (>365)
Fuel % Antifreeze % 0 (0)
Water % 0 (0)
Insolubles % 0.2 (
Copper was the only wear metal above average in the first sample from your Subaru. This shows excess wear at a brass/bronze part, such as a bushing. We have noticed many Subarus running Mobil one have high copper. We don't normally think that oil brand makes a difference, but maybe in this engine it does. Try something else to see. No harmful contaminants were found in the sample and the viscosity of the oil read normally. Universal averages for the 2.0L are based on an oil run of ~4,700 miles. Wear other than copper looks good. Check back for another look.
My take:
Copper could be from the oil cooler. I know you normally can't draw too many conclusions on a baseline uoa, but the comments from Blackstone are interesting.
I recommended a more robust M1 (TDT, HM), GC or Amsoil. Any other comments or recommendations?
Thanks,
Dennis
Stock car, OEM air filter, Purolator Pure one oil filter, lots of stop and go driving during the daily commute. M1 5W-30 went in again.
Miles on oil: 4,900
Miles on motor: 70,700
Element Value (Universal Average)
ALUMINUM 2 (3)
CHROMIUM 0 (1)
IRON 6 (8)
COPPER 18 (5)
LEAD 5 (5)
TIN 0 (1)
MOLYBDENUM 87 (73)
NICKEL 0 (0)
MANGANESE 0 (1)
SILVER 0 (0)
TITANIUM 0 (0)
POTASSIUM 1 (1)
BORON 40 (65)
SILICON 13 (9)
SODIUM 6 (8)
CALCIUM 2552 (2401)
MAGNESIUM 14 (113)
PHOSPHORUS 636 (730)
ZINC 830 (870)
BARIUM 0 (0)
Property Value (Should Be)
SUS Viscosity @ 210F 57.6 (55-62)
cSt Viscosity @ 100C 9.54 (8.8-11.1)
Flashpoint F 375 (>365)
Fuel % Antifreeze % 0 (0)
Water % 0 (0)
Insolubles % 0.2 (
Copper was the only wear metal above average in the first sample from your Subaru. This shows excess wear at a brass/bronze part, such as a bushing. We have noticed many Subarus running Mobil one have high copper. We don't normally think that oil brand makes a difference, but maybe in this engine it does. Try something else to see. No harmful contaminants were found in the sample and the viscosity of the oil read normally. Universal averages for the 2.0L are based on an oil run of ~4,700 miles. Wear other than copper looks good. Check back for another look.
My take:
Copper could be from the oil cooler. I know you normally can't draw too many conclusions on a baseline uoa, but the comments from Blackstone are interesting.
I recommended a more robust M1 (TDT, HM), GC or Amsoil. Any other comments or recommendations?
Thanks,
Dennis