what bessie or in my case, josi, means.ur into the class, you could sense the energy shift. >> reporter: the hardest part about checking tire pressure is not to lose the cap. >> what about this cracking here, is this telling you even though there is a fair amount of tread left, i still need to think about getting a new tire? >> absolutely. >> so it is full. >> right. do you see the glisten? >> i am showing people what they need on their car and when i see they get it, i get energized. >> reporter: let's review what we all ought to know at the end of this day. first up, fluid, the darker your oil, the more frequently you should change it. brake fluid looks like chardonnay. always use the same color coolant your car came with. next, tires, recommended pressure is on the driver's door, the side wall is your tire's weakette point. look for cracks and known tread. know your tire's birthday, listed by the week and year. know your baby, bond with your car, give it a name. everything has a life span, from the battery to your tires.