Big luxury sedans often disappoint in gas mileage, and the Lincoln MKS isn't any stranger to the fill-up.
The base versions of the MKS earn EPA ratings of 17/25 mpg. That's a low figure for a modern V-6-powered sedan, with even the bigger six-cylinder Buicks and Chryslers getting up to 30 mpg on the highway. Add on all-wheel drive, and fuel economy dips to 16/23 mpg.
Adding on turbocharging in EcoBoost models doesn't cut down fuel economy, however. The very quick MKS EcoBoost checks in with gas mileage of 17/25 mpg, about what you might find in a full-size, V-8-powered sedan. Ford does say the EcoBoost's performance rivals that of V-8 competitors, and in that context, it's more competitive--while still low.