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    ROYAL PURPLE HPS 5w-20; Ford 5.0 2015 Mustang

    Please see attached royal purple hps 5w-20 UOA. First one was factory ford crap oil. Last 3 are royal purple hps. Most recent sample is 2.5 year old oil about 8k and tbn still 5.8. Oil don't get bad with age. Also car has a super charger on it.
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