i keep thinking that car is runnning rich-it has a smell to it when running and it's not gas

What is your question?

longer than a month and I drive maybe 37 miles every other day. just turned over to 150 thousand miles. I can smell the SMELL every time it's running and it's stronger upon starting and low idle. my oil is quite dark in color but I can still see that there's transluncy and no sign of water in it.

What makes this problem better or worse?

i haven't noticed

How long has your 2005 Chevrolet Aveo had this problem?

2 months