1999 Cadillac Catera

1999 Cadillac Catera 6 cyl Two Wheel Drive Automatic

i just bought a used 99 cadillac catera. I got home about 30 minutes ago, and checked the engine oil cap because the oil light came on and I thought the car needed oil. I noticed a yellow foam on the engine cap and around the mouth and neck. I smelled the foam, and it smells of gas. What can cause this problem? Did I buy a lemon? And the speedometer is broken (i know, I should have test driven the car, but I bought the car at an auction that advertised that u can test drive the car, but after I got there, it was a different story), so the mileage stopped at 92k. I thought I was getting a good deal, I think I may have been had? Can u help me? I spent all of my money on this car to get to work. Now i'm broke. Please help.
October 17, 2009.

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