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In my opinion, it is a good oil, but also a marketing thing too. If I recall correctly, I saw a list of GM approved oil one time recently and RP as well as Amzoil was not on the list. Now, I'm not saying GM will void your warrenty for using RP or Amzoil, just food for thought. I'm sticking with Mobil1.
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ProCharger P1X, Vengeance Racing Kaotic Cam, ARH Headers and Exhaust with Borla ATAK mufflers, MGW Shifter, MTI Drop Springs, Forgeline RB3C Wheels, 3.91 gears, Night Owl LED Control System
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