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Old 07-22-2013, 06:16 PM   #55
Scooby Guru
Member#: 767
Join Date: Jan 2000
Chapter/Region: Tri-State
Location: N.J.
04 FXT


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.

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