Mobil 1 is what I've always used. I used to work for Mobil and it seems to be one of the best oils to use next to Amsoil and a couple others.
5w-30 Mobil 1 is what I've been using since that's what the car calls for. Also running a Mobil 1 filter.
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05 SRT-4 and 04 SRT-4 
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