Rotella T 10W-30 3729 Miles 2008 Subaru Legacy GT

Joined
Jun 9, 2003
Messages
2,065
Location
Sequim, WA
Here's the latest on my Legacy GT. The Rotella is proving to be a solid choice for this engine. The copper is still a bit high, but I suspect that is an interaction between the Rotella chemistry and the big, copper oil cooler. The fuel is a bit high likely because the warm-up for this change was all at idle while I changed the coolant and P/S fluid.
 Code:
    Report Date        18-MAY-09
    Lab	                Blackstone
    Make	        Subaru
    Model	        Legacy GT
    Year	        2008
    Engine	        2.5L Turbo F4
    Miles On Veh.	30,016
    Oil Brand	        Shell
    Oil Series	        Rotella T
    Oil SAE J300	10W-30
    API SX		CJ-4/SM
    Miles on Oil	3729   ~2 months in service
    ***Elements***
    Aluminum Al	        3
    Chromium Cr  	0
    Iron Fe             5
    Copper Cu           16
    Lead Pb	        1
    Tin Sn	        1
    Molybdenum Mo	2
    Nickel	        0
    Manganese Mn	0
    Silver Ag	        0
    Titanium Ti	        0
    Potassium K	        6
    Boron B	        24
    Silicon Si	        14
    Sodium Na	        4
    Calcium Ca	        2252
    Magnesium Mg	8
    Phosporus P	        1107
    Zinc Zn	        1501
    cST @ 100 C         10.9
    SUS @ 210 F	        61.3
    Flashpoint	        375
    Fuel %	        TR
    Antifreeze %	0.0
    Water %	        0.0
    Insolubles %	0.3
    TBN                 N/A
    Additives	        None
    ***Filters used***
    Air Filter			Subaru OEM
    Oil Filter			Subaru OEM
    Location                    Reno, NV   USA  
Ed
 
Joined
Aug 8, 2007
Messages
786
Location
Indiana, USA
Where do you get the Rotella 10w30? Here in Chicagoland I can only find it at Menards (big box hardware, think HD) and that only in the winter.
 

edhackett

Thread starter
Joined
Jun 9, 2003
Messages
2,065
Location
Sequim, WA
I pick it up at the local Shell distributor. It doesn't cost any more than GTX, QS, Valvoline, etc. at Kragen/Pep Boys. Yes, that zinc number looks to be a bit high. This is what I got last time on he same date code batch: P 1245, Zn 1338. I think we are seeing lab errors in the higher numbers. If any of the labs doing these cheap analysis are within 10%, I'd be surprised. Ed
 
Joined
Aug 4, 2003
Messages
2,518
Location
NJ
Nice car, nice oil, nice uoa. \:\! You should change the listed oil filter to: Tokyo Roki, fka OEM. I presume that "big, copper oil cooler" refers to the oem cooler. -Dennis
 
Joined
Sep 23, 2006
Messages
11,264
Location
Bad Axe, MI
 Originally Posted By: addyguy
For CJ-4/SM Rotella, that's a LOT of zinc. Shouldn't it be around 1100-1200?
x2...nice numbers!!!
 
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