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Boosted12a · 03-18-2020, 08:24 PM

Royal purple is a good detergent oil. I put it in my n54, changed it at 3k and it was black. Every oil change since then has been only slightly darker than fresh oil. I use rotella t6 5w40

03-18-2020, 08:24 PM	#13
Boosted12a Second Lieutenant 68 Rep 210 Posts Drives: BMW 335i x Join Date: Jun 2019 Location: Va iTrader: (0)	Royal purple is a good detergent oil. I put it in my n54, changed it at 3k and it was black. Every oil change since then has been only slightly darker than fresh oil. I use rotella t6 5w40
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