Every few months I get the warning light to check my tyre pressures. So today, after getting the warning again, I decided to record the current pressure of each tyre so I could confirm which one it was. However when it came to adding air to them all of them where several (5-7) psi off where they should be and none dramatically worse than the others.
I doubt I have a slow puncture on every single tyre. They're not even that old. The tread is fine on them all. The car passed a full MOT and Service back in July.
Any ideas?
