2009 Mercury MarinerMercury Mariner lets you know you've chosen the right SUV - every time you fuel up. Mariner I4 features a new Duratec® 2.5L DOHC I4 engine with best-in-class EPA-estimated mpg of 28 hwy mpg. The Duratec 3.0L DOHC V6 engine on the Mariner V6 and Mariner Premier V6 delivers 240 horsepower, while providing impressive fuel efficiency.** There's also Mariner Hybrid, one of the world's most fuel-efficient SUVs,† with an EPA-estimated 34 city/31 hwy mpg (FWD). No matter which Mariner model you choose, you've made the right choice.