the pumps at my morrisons only go to 32 lol.
the book says 28 front 28 back, but i usually run 30, 28, but might try a higher pressure.
if you use the motor way the motor way then the front should be higher renault say int he wee book 29psi, but i think that make the car feel bogged down.
the pressure effects the tyre wear, too high the middle balds faster too low then the edgers wear faster than the middle, but i run a high psi and give the car som stick so all the tyre is getting used...i love the twisties.