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soundslikeboxer · 03-07-2008, 03:37 PM

Yea royal purple isn't in an approved class of oil or some bs like that. Something about the phosphorus levels?

I use german castrol and its runs great, still very clean when I change oil at 3k miles.

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03-07-2008, 03:37 PM	#2
soundslikeboxer Scooby Specialist Member#: 131915 Join Date: Nov 2006 Chapter/Region: MAIC Location: Richmond/Va Beach Vehicle: 2007 WRX sexy white pearl	Yea royal purple isn't in an approved class of oil or some bs like that. Something about the phosphorus levels? I use german castrol and its runs great, still very clean when I change oil at 3k miles. * Registered users of the site do not see these ads.