I'm looking for a 2008 G6, and I found one in the area with only 16K miles. I was looking for a V6, but the one I found is only a 4 cylinder. Basically, I need to know what the differences would be between the two. (Not technical stuff, but how it would drive, gas mileage, etc. I'm a girl with no mechanical background, so I don't understand fancy car terms.) Should I go ahead and get this one, or should I keep searching for a V6?