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Old 05-24-2010, 09:31 PM   #1
*** Banned ***
Member#: 233276
Join Date: Dec 2009
Location: Baltimore md
2009 2.5i Hatch

Default Pennzoil Ultra UOA analysis 4,000 miles

Mileage on Engine: 30,200
Miles on Oil: 4,000
Makeup Oil: 0
Aluminum: 3
Chromium : 1
Iron: 9
Copper: 1
Lead: 0
Tin: 0
Moly: 55
Nickles: 0
Manganese: 0
Silver: 0
Titanium: 0
Potassium: 2
Boron: 308
Silicon: 6
Sodium: 4
Calcium: 2814
Magnesium: 115
Phosphorus: 732
Zinc: 943
Barium: 0

SUS Viscosity @ 210F: 59.2
cSt Viscosity @ 100C: 10.00
Flashpoint in F: 390
Coolant: 0
Fuel: <0.5
Water: 0
Insolubles: 0.3

Wear looks good in the first sample from your Impreza. Universal averages for the 2.5L are
based on an oil run of about 4,000 miles. That's exactly how long your oil was run and we are happy to see
all wear reading at or better than average. Lead was excellent at 0 ppm, and this shows virtually no wear
from the rod and main bearings. No harmful fuel dilution or anti-freeze was found and the viscosity of the oil
read in the 5W/30 range. We see no signs of any obvious problems developing in this data and a longer oil
run should be fine. Try going up to 6,000 miles

Oil filter was Champion Labs re branded STP filter from Auto Zone
maruksai is offline   Reply With Quote
Old 05-25-2010, 12:10 AM   #2
Scooby Newbie
Member#: 208934
Join Date: Apr 2009
Location: canada
09 2.5i


good post. first uoa I've seen for penzoil ultra. great to see the data that it's working out for you.
littlec is offline   Reply With Quote
Old 05-25-2010, 01:02 AM   #3
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
2005 2.5RS Wagon
Regal Blue Pearl


Those are very similar numbers to what I've been getting from the Pennzoil yellow bottle (cheap stuff).
williaty is offline   Reply With Quote
Old 05-25-2010, 12:50 PM   #4
Scooby Newbie
Member#: 186303
Join Date: Aug 2008
Chapter/Region: SCIC
Location: So. Cal
2011 Legacy 2.5i 6MT


Great post. It gives me a general idea how long the NA engine need oil changes for the current models.
FLZ_Boy is offline   Reply With Quote

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