Noob looking at G's
 

Hey everyone, I'm in the market for a new used car under about $15k. I need AWD and decent gas mileage. A friend has a newer Infinity coupe and really likes it. My last couple of cars have been a Honda Accord and Acura TL and I've really liked the low maintenance. The AWD Acura TLs in this price range seem to have an oil burning issue, so I'm steering away from them.

Is there a model year G that is more desirable? Are there certain years with more problems? Can I expect to get around 25mpg on the freeway?

Thanks!