I would follow the manufacturer's recommendation for viscosity for the conditions you drive in. Using a higher viscocity oil will not help you in any way and could reduce performance and gas mileage. I do recommend using synth though.
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Inferno Red GT, 5 speed, Stage 1, Airaid intake, Custom Intake Pipe, VAK UCP, Borla Duals, chrome wheels, chrome door spears, AMP chrome fuel door, PT Cruiser 3rd light diffuser, H&R Springs, MGW chrome door lock pulls, Blane's hood struts, Custom license plate mount, leather wrapped E-brake handle, Momo Shifter knob, Custom Pedal covers, ambient air temp sensor relocated to air intake ...more to come
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