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Old 06-11-2006, 08:09 AM   #1
bluesubie
Scooby Guru
 
Member#: 767
Join Date: Jan 2000
Chapter/Region: Tri-State
Location: N.J.
Vehicle:
04 FXT
20 OB Onyx XT

Forester German Castrol 0W30 used oil analysis, 7,478 miles, '04 FXT

Looks like I need to switch to a thinner o i l next winter. My f u e l is too high due to short trips (commute 5 miles each way), thick oil and long o il ch ange interval. I can't believe how shear stable this stuff is.

First column is current (gold GC), second column gold GC w/6,144 miles, third column green GC w/5,930 and fourth is M1 5W30 w/5,774.

Quote:
Equipment make: Subaru
Equipment model: 2.5L Turbo
Oil use interval: 7,478
Oil type & Grade: Castrol Syntec 0W30
Make-up oil added: 0
Miles on unit: 37,478
Air filter: OEM
Oil filter: OEM

Aluminum 4 4 4 6
Chromium 1 1 1 1
Iron 16 11 10 15
Copper 7 10 6 20
Lead 3 3 2 2
Tin 0 1 0 0
Molybdenum 9 4 12 63
Nickel 0 0 1 0
Maganese 1 0 0 0
Silver 0 0 0 0
Titanium 0 0 0 0
Potassium 0 0 0 3
Boron 0 1 14 115
Silicon 13 15 15 18
Sodium 18 6 2 6
Calcium 2165 1689 2582 3394
Magnesium 436 398 106 10
Phosphorous 816 754 680 764
Zinc 1011 909 818 904
Barium 0 0 0 1

Properties
SUS Viscosity @ 210F: 66.4
Flashpoint: 340F [>385]
Fuel %: 2.3 [<2.0]
Antifreeze: ? [0]
Water: 0 [<0.1]
Insolubules: .2 [<.6]

Dennis: Your fuel dilution had been improving, though it jumped back up to a problem level in this oil. The viscosity increased and this is backwards of what we normally see with high fuel, so we aren’t sure if the fuel is a major concern or not. The viscosity was still in the 30W range, so we can’t complain about it too much. Iron wear increased with the longer oil run which is normal, and all other wear still looks good. Sodium could show some antifreeze, though no potassium was found, so we don’t think that’s the case. We’ll keep an eye on these findings next sample.
Post on BITOG

-Dennis
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Last edited by bluesubie; 06-11-2006 at 08:16 AM.
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