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04-17-2012, 11:43 AM | #1 |
Scooby Specialist
Member#: 304662
Join Date: Dec 2011
Chapter/Region:
MAIC
Vehicle:2001 Impreza L coupe Sedona red Pearl |
UOA: Mobil (not M1) 5w30
Here's the UOA for my 2.2L after 3700 on the conventional Mobil 5w30. Just putting it up because I don't see many conventional UOAs here especially for the n/a 2.2's.
They said the viscosity is a little low. Maybe PROOF that 5w30 does shear down in our engines. The air filter WAS NOT clean with this batch of oil. It was about 9,000 miles overdue for a change, so they guessed right when they said I should check it. Unknown silicon though. No coolant! Fuel wasn't a problem. Switched to t6 yesterday though, so in a few oil changes or so I'll get a UOA on that.
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Last edited by ManualOverAuto; 04-17-2012 at 04:43 PM. |
04-17-2012, 05:52 PM | #2 |
Scooby Guru
Member#: 767
Join Date: Jan 2000
Chapter/Region:
Tri-State
Location: N.J.
Vehicle:04 FXT 20 OB Onyx XT |
Holy mackerel. Even your 2.2 sheared it pretty good. Your wear is good though. Here's a Legacy 2.5i 8k mile on the old Mobil Clean 5,000.
http://www.bobistheoilguy.com/forums...Number=2375274 Looks like the sodium is an additive. I would probably just use a conventional High Mileage oil in a 2.2. I'm running Pennzoil 5W-30 HM in a 2.5RS and intervals are 5-6k miles. Pennzoil conventional has higher detergent and anti-wear levels than Mobil. http://www.pqiamerica.com/testresultssep2011.html Was that an OEM air filter? -Dennis Last edited by bluesubie; 04-17-2012 at 06:01 PM. |
04-17-2012, 06:19 PM | #3 | |
Scooby Specialist
Member#: 304662
Join Date: Dec 2011
Chapter/Region:
MAIC
Vehicle:2001 Impreza L coupe Sedona red Pearl |
Quote:
As for the oil, I guess this UOA is proof that Mobil 5w30, whether it be synthetic or dino (like mine), shears down a good bit in our engines. |
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04-17-2012, 08:08 PM | #4 |
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There
Is No Good 5w30 Oil That You Can Just Walk In And Buy This Is Already A Well Established And Known Fact |
04-17-2012, 09:30 PM | #5 | |
Scooby Guru
Member#: 767
Join Date: Jan 2000
Chapter/Region:
Tri-State
Location: N.J.
Vehicle:04 FXT 20 OB Onyx XT |
Quote:
That's the funny thing about a lot of people freaking out about about new cars speccing 0 or 5W-20. Their 5W-30 is an xW-20 after a few hundred or thousand miles! -Dennis Last edited by bluesubie; 04-17-2012 at 09:42 PM. |
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04-18-2012, 12:39 AM | #6 |
Scooby Specialist
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Join Date: Sep 2003
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MWSOC
Location: Minneapolis, MN
Vehicle:07 OBXT OBP |
7.86 cSt? That's seriously thin, nominally 27% shear! The flashpoint looks good, indicating that the reduction in viscosity is actually shear and not fuel dilution. Scary stuff, there are plenty of 5w20s which would be thicker after 3700 miles than this 5w30. I'm not even talking high zoot group V Redline 5w20 either.
I have to disagree with Blackstone on the viscosity not being an issue, especially in an engine with a penchant for spinning main bearings. It would be really interesting to know the VI and HTHS of this used oil. |
04-18-2012, 12:56 AM | #7 | |
Scooby Specialist
Member#: 304662
Join Date: Dec 2011
Chapter/Region:
MAIC
Vehicle:2001 Impreza L coupe Sedona red Pearl |
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