Not sure tbh, tyre pressures have not changed since 5th march tho, altho im not sticking my wheels and tyres in an oven (Not sure how that helped equate to mr and mrs Random driving the family hack down to tescos and back
), I know when they did mine they said it was important to fill the tyres with nitrogen then release the pressure and then re-inflate to ensure as much Nitrogen in the tyre as possible, it was free so if it helps great, if not, no matter, I still check pressures every friday anyway
Car does not feel any different, although noticed the Michelin rear tyres were much quieter than the Bridgestones they replaced
probably due to fact that the Michelins are 3db quieter than the Bridgestones.