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Old 07-22-2013, 10:35 PM   #57
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Join Date: Mar 2012
Location: ND
2012 2.0i Sport 5MT


Originally Posted by bluesubie View Post
Actually, even for the BRZ a thick 30 grade like German Castrol or a 40 grade oil is not needed with stock internals.

For someone considering a thicker oil, you should first do a used oil analysis to determine if you need a thicker oil. Even if I had an Impreza that burned oil using 0W-20, I would switch to a 5W-20 before trying a 30 grade. 5W-20's are more stable and usually have better NOACK volatility ratings (less evaporation).

I don't see many BRZ uoa's but there are a lot of good ones on using 0W-20.

I wonder how a 5w would do at -20f, in theory it should pour easy enough, and amsoil 5-20 signature has a lot lower volatility than 0-20
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