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Old 06-23-2013, 10:18 PM   #79
Scooby Specialist
Member#: 43950
Join Date: Sep 2003
Chapter/Region: MWSOC
Location: Minneapolis, MN
07 WRX LTD Wagon
Satin White Pearl


7.9 cSt is pretty thin. My factory fill was 8.2 cSt after 1,300 miles, apparently Subaru hasn't started using a more shear stable factory fill.

2.9 TBN is pretty low for less than half the recommended OCI too. With all that calcium though, I'm guessing this is an overbased oil which will stabilize at a TBN just over 2.0 for many miles.

Thanks for sharing, it's interesting to see another factory fill.
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gpshumway is offline   Reply With Quote