In reality overall tire performance is down to the driver of the car.I am not a fast driver but try to keep to the speed limit if conditions allow.
The tires didn't not appear to loose pressure.
I live on the Gloucester, Hereford and Worcester and the road conditions are quite frankly in certain areas are dangerous. My tires do handle the road conditions extremely well.
I run the tire pressures at 36 psi all round at have achieved 61 mpg but my wife was not speaking to me during our journey !
Generally on a good journey I achieve 50 + and I believe much of that comes down to tire choice.The car was fitted with Perrelli tire from the factory and in all honesty no issues with them but I do prefer the Michelin product.

