Guys don't trust the tyre gauges at petrol stations or in fact tyre fitting places. I brought a digital gauge after using big e,s one. Petrol station gauges both analogue and digital type as much as 4 psi out, I had 2 new tyres on font of m3 on Thursday, there gauge was 3psi low. M3 is a pain as you have to have oposing tyres even or bloody tyre pressure warning light comes on