How much does it cost to replace a tire’s wheel stud?

I just had the catalytic converters on my Lincoln Town car replaced and they charged me quite a lot. I’m pretty sure they charge per converter and the invoice says “x6.” That can’t be right, is it? There’s no way my car has six catalytic converters. How many does the Town Car have?

I want a reliable used SUV. I’ve been doing some research, and I think that I can get the Saturn Vue on the cheap. My only concern is that it may have some major mechanical issues. Are there any common problems with the Saturn Vue?

My commute is almost an hour-long, and I’m in the market for a new car. With gas prices out of control, I’m considering a smaller model than the one I have now. How many mpg can I get with a Nissan Altima?