I've always put about 30 in all the tyres of my mini, and it's been fine......... a few weeks ago the tyre pressure light came on. They looked a bit low at the front so went to the garage and put some...
After 2 years, i suppose i better clean the van (white vauxhall combo). Someone commented yesterday that it looked like ive just found it in a field!!!!! Trouble is, some of the dirt, grime, algea etc...