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bluesubie · 12-12-2012, 08:06 AM

And here's a recent discussion about Pennzoil Platinum 0W-20:

http://www.bobistheoilguy.com/forums...gonew=1#UNREAD

I've only read a couple of replies, but of course a large focus in that thread is about PP's low Viscosity Index. A high VI means the oil is less prone to shearing and is lighter in freezing temp start-ups. Viscosity Index Improvers are also the first thing in oil to break down in oil and cause deposits.

IMO, the more important spec for a BRZ/FR-S is a low NOACK volatility number (measurement of evaporation). Platinum's NOACK is 8.9% while many oils are around 13% (if you can even find the NOACK). Lower is better.

And for those that live in the North Pole, a lower MRV means the oil is thinner at -40C.

-Dennis

12-12-2012, 08:06 AM	#92
bluesubie Senior Member Join Date: Sep 2012 Drives: 2004 Subaru Forester 2.5XT Location: Central NJ Posts: 681 Thanks: 28 Thanked 273 Times in 200 Posts Mentioned: 9 Post(s)	And here's a recent discussion about Pennzoil Platinum 0W-20: http://www.bobistheoilguy.com/forums...gonew=1#UNREAD I've only read a couple of replies, but of course a large focus in that thread is about PP's low Viscosity Index. A high VI means the oil is less prone to shearing and is lighter in freezing temp start-ups. Viscosity Index Improvers are also the first thing in oil to break down in oil and cause deposits. IMO, the more important spec for a BRZ/FR-S is a low NOACK volatility number (measurement of evaporation). Platinum's NOACK is 8.9% while many oils are around 13% (if you can even find the NOACK). Lower is better. And for those that live in the North Pole, a lower MRV means the oil is thinner at -40C. -Dennis Last edited by bluesubie; 12-12-2012 at 02:14 PM.