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bluesubie · 10-22-2012, 04:32 PM

Royal Purple is fine and the reformulated GF5 oil is made from Group IV and Group V base stocks (according to emails from RP). If anyone has data showing that RP 0W-20 (or Mobil1) is not good a good choice in a BRZ/FRS, then I'm all ears.

-Dennis

10-22-2012, 04:32 PM	#8
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) Tagged: 0 Thread(s)	Royal Purple is fine and the reformulated GF5 oil is made from Group IV and Group V base stocks (according to emails from RP). If anyone has data showing that RP 0W-20 (or Mobil1) is not good a good choice in a BRZ/FRS, then I'm all ears. -Dennis