Remember, I am a poor college student. I definitely can't afford another car. Then I would have to pay for insurance on both also. It will take a long time before I would even break even on saving the gas. Plus 4 cylinders don't last as long as a v6 or v8 and I will probably have a lot of problems with it. Plus Aurora's are nice cars, but they aren't that nice that I am going to use it as a weekend car. A Corvette, Fararri, or a supped up classic car is a weekend car. An Aurora isn't a weekend car.
The only way I would justify buying a 4 cylinder car is if I sell my Aurora. (And with gas prices the way they are, don't think that hasn't crossed my mind.)