I feel like I've been starting a lot of thread lately, but I've got lots of questions. My tires always look a bit low, and I noticed that the tire say 45 psi while the car says 35 (or it maybe 40/30, the tires are 10 more than the car). So I checked the tires and they were set at what the car said, so I filled them up to what the tires said. Later, completely forgetting I had done this, I was at a local mechanics, and he was letting air out and had the front desk lady come talk to me. She said "Who put airs in your tires?" I said I did, she said "They were 10 over, you shouldn't ever have them more than what the door jamb says" I said that I was going off what the tire said. She kinda paused and then starting saying something about how it doesn't matter what the tire says, it should be what the car says. I was just like, whatever, do what you want. I didn't feel like arguing because I've done business with them before and she doesn't really know what she's talking about most of the time. She thinks she knows a lot about cars because she's been working the desk for 20 years or something.
Later I check my tire pressure. They had actually "over" inflated (according to what the lady said they should be) so it was right in between the two ratings, like they were kind unsure so they just averaged them.
What should I go off of for tire pressure?
Another quick story, I took my car there for an oil change. I asked for high mileage and she said thats a waste because all that's different is it's full of additive which car manufactures don't suggest. Then she was saying how the only additive they suggest using is this ting (I don't remember) and that I should use it if I've never used it. (So she was bashing on additives, then was trying to sell me some). So I went with regular oil, and about a week later I noticed my rear main was leaking. So I had to buy some Bar's Leaks to try and stop it. I thought this story was very ironic.