My 2006 Volvo S40 has been giving me problems the last month.

What is your question?

My Volvo started giving me problems last month. First it died on me at the gas station and I had to get it towed home. I figured it might be bad gas so I put in a fuel cleaner and my car ran well for two weeks and then it died on me again. The engine will shake and my rpms will be all over the place and it will shut off after a few minutes of rough idiling. Changed air filter because it was bad and my car ran for a few more days and then it died again as well. I've taken it to two separate mechanics and both couldn't find anything wrong with it. Both times it ran when they got it and died the day after I took it home both days and I'm just frustrated because it's killing me at my job not having reliable transportation. My car has 180,000 miles and I am the second owner.

How long has your 2006 Volvo S40 had this problem?

Over a month