Just put 12k miles on royal purple
I switched to royal purple at 7500 miles , 6 months ago. I just hit 19500 and will change the oil tomorrow . I'm gonna send a sample to blackstone lab once my kit comes in . So hopefully I should have a report in a few weeks.
Changed the oil today with more royal purple and Mobil 1 filter. One thing I rec is checking your oil filter is tight ever so often. Mine was so loose I twisted it by hand and it came loose with ease. Only thing I can think of is engine vibration because I put it on pretty tight the last time. It wasn't leaking so I got extremely lucky.
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