I use only Mobil 1 in my 03GT and it dont gain me any HP or mileage just peace of mind. The only noticeable trait was it runs very smooth with less vibration.
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06 GT Auto, Cool Vanila Exterior, Presto Change O 3bl, Cargo Mat and Net, Billet Oil Cap, Yoko Avid 4Vs Tires, 03 GT Wheels, 4 Chrome Door Handle Screw Covers, MOPAR Mud Flaps, H&R Rear Sway Bar, Freedom Strut Tower Bar, Rear Door Sill Covers.
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