I have 4 Uinroyal tires that came with my Certified Used 2007 Aveo5 that I just got with 59K miles on it. Tires look almost new, but I don't know if they're original. The manual recommends inflating tires to 60PSI. The tire itself recommends a max 44PSI. This is a rather large difference and am hesitant to go over 45PSI. I've heard a lot of differing information on this topic about other tires and cars. Any input?