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Old 04-24-2008, 01:12 AM   #1
KevinM
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Talking Used Oil Analysis - Redline 10w40 - 2002 WRX

Here is my recent analysis on the wife's '02 WRX wagon, Redline Oil 10w40 with 6,800 miles and ZERO make up oil added. Pretty easy driving, mostly city. The older analysis listed is of Royal Purple 10w30, but there was a crack in the air box which caused the high iron. I will be sticking with the Redline oil.

Pretty happy with the results.

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Last edited by KevinM; 04-24-2008 at 01:17 AM.
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Old 04-24-2008, 09:14 AM   #2
bluesubie
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Your wear is too low and you need to drive the car much harder.
Usually people say that you can go with a lower viscosity with Redline because it's such a robust oil.

Why did you go with 10W40? Because SD = hawt? Was there much difference in turbo spool and fuel economy in comparison to the 20 weight you had in there? Or does your wife let you drive it? I would stick with this since it's working well for you.

-Dennis
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Old 04-24-2008, 09:47 AM   #3
Timdog1650
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Very nice UOA. It's always fun when they tell you that not only is your engine fine, but you can save yourself some money on oil changes. Win/Win.
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Old 04-24-2008, 11:42 AM   #4
AllWheelsDriven
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looks great....check out those viscosity numbers vs rp
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Old 04-24-2008, 12:04 PM   #5
bulwnkl
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So, BS didn't know why iron wear was so much lower, huh?
Have you seen recent VOAs on each of these two oils?
Interesting that an intake leak would raise Fe wear but not hard-metal wear...

Nice improvement. Good work repairing the intake crack.
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Old 04-24-2008, 01:11 PM   #6
JamesWilson
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Ah, I read that on BITOG last night If I could only remember my login and password there, I would have posted hehe.
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Old 04-24-2008, 02:35 PM   #7
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Quote:
Originally Posted by AllWheelsDriven View Post
looks great....check out those viscosity numbers vs rp
The RP viscosity is normal. 10W30 sheared to a 20 weight.

-Dennis
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Old 04-24-2008, 07:27 PM   #8
AllWheelsDriven
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^^ lovely
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Old 04-25-2008, 12:09 AM   #9
KevinM
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Quote:
Originally Posted by JamesWilson View Post
Ah, I read that on BITOG last night If I could only remember my login and password there, I would have posted hehe.
No sweat James, got you covered.
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Old 04-25-2008, 12:09 AM   #10
KevinM
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Quote:
Originally Posted by bluesubie View Post
The RP viscosity is normal. 10W30 sheared to a 20 weight.

-Dennis
Yep, the Royal Purple from the prior UOA was 10w30.
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Old 04-25-2008, 01:22 AM   #11
JamesWilson
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Quote:
Originally Posted by KevinM View Post
No sweat James, got you covered.
Oh crap, hey Kevin! You get around, don't you? Sell the Porsche 951 yet?

Back to the Redline, looks like it held up very well and stayed a relatively-40wt. I wonder if there is a benefit of the Euro 5w-40 over the 10w-40 for next time? Probably not...find something you like and stock up!
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Old 04-25-2008, 06:42 PM   #12
KevinM
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Quote:
Originally Posted by JamesWilson View Post
Oh crap, hey Kevin! You get around, don't you? Sell the Porsche 951 yet?

Back to the Redline, looks like it held up very well and stayed a relatively-40wt. I wonder if there is a benefit of the Euro 5w-40 over the 10w-40 for next time? Probably not...find something you like and stock up!
Still have the Porsche, you should buy it! It just sits in my garage while I drive my 11 mpg Jeep to work.


What is the difference between the euro and the 10w40. I figure it is better to stick to the 10w40 vs a 5w40 in this town, the car never sees below 30 degrees.
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Old 04-25-2008, 08:53 PM   #13
bulwnkl
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What's the difference? The 5W40 uses at least a little VII, the other Red Line formulations don't. Well, they didn't. Haven't taken a look in a couple years and all kinds of formulations have been jacked around by lots of people to try to maintain price points.

Still, the 5W40 will flow better, perhaps much better, when cold. Cold being defined as the period between startup and full oil operating temp, not just low ambient air temps.
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