Next New Oil You Will Try ?

Same brand Pennzoil, put Pennzoil Ultra Platinum 5w30 in my 17 Regal GS 2.0T after draining Pennzoil Platinum 5w30.
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Guess I’ll reincarnate this thread since I’m up late and tired of studying lol. Eyeballing Castrol 5w-40 or Mobil 1 0/5w40, if I decide to stick with Xw-40. If I go back to OEM spec 5w-30 I will try out the Valvoline EP 5w-30.
 
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