Hi. Please, use the manufacturer tyre suggested pressure range.

Tyre pressure is function of the design of the tyre, not the car model (by a example, I use local 4 ply nylon tires designed for 400 kg e/o, and set it 24 psi front and 28 psi rear).

Of course, tires are designed for take a predetermined weight, and it is important (Amazon weight near 1000kg, plus people plus travel bags, it is near 1500 kg, on my case my tires support 1600kg max (4 x 400 kg). If you dont know that data, usually you can check it on any web tires store or on the web site of the manufacturer.

You can add a additional 3 psi pressure if you run like Tas (looney tunes, no pun intented if you are a concious driver), but is a good idea to don't pass the max pressure stated by the manufacturer (or the max safe speed for that tyre).

Happy volving.
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Joaquin / Rojo 121 / Lima, Peru