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Old 01-17-2007, 11:16 PM   #1
WRX06TR
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Default 10W-30...Cause any problems

Hey i just changed my oil and i put in 10W-30 instead of the recommended 5W-30...will it cause me any problems? I drive an 06 WRX and im in reno where its been really cold...
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Old 01-17-2007, 11:35 PM   #2
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Quote:
Originally Posted by WRX06TR View Post
Hey i just changed my oil and i put in 10W-30 instead of the recommended 5W-30...will it cause me any problems? I drive an 06 WRX and im in reno where its been really cold...
0W40 works well in cold environments. Has a lower poor temp and a higher flash point. I'd use this in the future. But back to your original question, the difference in poor temps for 5 and 10 is 9 degrees (-54 vs -45) so I would say you're fine.
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Old 01-17-2007, 11:38 PM   #3
WRX06TR
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I will keep that in mind...but is the 10W-30 goin to cause any problems?
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Old 01-18-2007, 12:09 AM   #4
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no I would doubt it would cause any problems, except maybe hurt the mpg a tad and possible lose 1-2hp cause of the thickness of the oil and in cold it won't lubricate the engine as well on start-up. Better to use it in the hot months.
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Old 01-18-2007, 12:16 AM   #5
WRX06TR
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thanx. yea i remembered hearing that thinner is better in winter. next time i will pay closer attention...thanx again
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Old 01-18-2007, 08:34 AM   #6
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Quote:
Originally Posted by Dobbs View Post
...the difference in poor temps for 5 and 10 is 9 degrees (-54 vs -45) so I would say you're fine.
How do you know the pour temp when the OP didn't state what oil is being used? Psychic?

-Dennis
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Old 01-18-2007, 08:48 AM   #7
Corkfish
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I've used Amsoil 10W-30 in my XT year round in the northeast. Works great. My car doesn't use a drop of oil.
10w-30 will not "hurt" your engine.
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Old 01-18-2007, 08:55 AM   #8
fourdegrees
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good stuff to read here:

http://forums.nasioc.com/forums/showthread.php?t=499177

Even more good stuff to read here:

bobistheoilguy.com

I use 10w30 non-synthetic in my STi.
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Old 01-18-2007, 11:07 AM   #9
ride5000
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10w30 is all i use.
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Old 01-18-2007, 11:12 AM   #10
akira02rex
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<- uses 10w40 valvoline synthetic blend.
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Old 01-18-2007, 01:00 PM   #11
Mulder
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There is a viscosity vs. temperature chart in your owners manual, follow that.
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Old 01-18-2007, 01:23 PM   #12
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Quote:
Originally Posted by Mulder View Post
There is a viscosity vs. temperature chart in your owners manual, follow that.
beat me to the RTFM comment...
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