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Old 05-22-2013, 09:11 AM   #22
kabz
Scooby Newbie
 
Member#: 351744
Join Date: Mar 2013
Chapter/Region: TXIC
Location: Northwest Houston
Vehicle:
2013 WRX
WRB

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Quote:
Originally Posted by gpshumway View Post
Looks pretty typical of a factory fill UOA. Yours held viscosity better than some, or it possibly was thinner earlier and has gotten thicker with continued use.

Amazingly low Fe and Al. Also surprisingly low TBN for 3,000 miles. Makes you wonder about taking it to 7,500 mi. This oil would have to be very overbased to hold its TBN for another 4,200 mi. It's got a lot of Calcium, but 3.2 TBN less than halfway through the OCI is a bit concerning.
I thought the sample looked really nasty, but I know nothing really. I do know that I'm much happier with OCI at 3500 miles or thereabouts, and checking the all fluids every fillup. No gas or coolant or water in the oil, but this car does use a little oil, I'm estimating maybe 1/2 - 1 qt per 3000, and the coolant has dropped off the top mark when hot, by almost 1cm, in about 1200 miles.

I would not be surprised if it ran better on a tune, but I'm staying with stock.
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