2006 Nissan Altima 3.5 SL 4dr Sedan (3.5L 6cyl 5A)
My 64-year old wife, the principal driver, at times got up to 27 miles per gallon on an interstate going to work. That's great for a 6-cylinder, 250 hp motor while doing 70 mph over 18 miles. Pickup was also great, doing zero to 60 in around 6 seconds. She always uses premium fuel, insisting she gets better mileage from it, and that the engine not only requires it, but extends engine life. The dealer also takes good care of her, and gives her a discount oil change if she brings the car in for service after 4 p.m. I've driven the car myself on occasion. What power! And it looks very stylish.
Best features are a small turning radius, and the ability to change radio stations and CDs with steering wheel buttons. The delayed front headlight automatic turnoff allows you to get into a darkened garage at night without stumbling.