Top Full-Sized 4WD V8 Trucks And Their MPG Ratings By Frank-Ling / Oct 20, 2015 share Facebook Twitter Google + LinkedIn Pinterest Email Share... Although it may seem rather odd to some people, one factor that is important to potential buyers of trucks is fuel economy. Back in the day this would have seemed ridiculous, but back then gas was only a couple of dollars a gallon or less.However, today’s truck shopper understands that fuel costs can affect the bottom line, and this is especially true if they want a V8 engine under the hood. Yes, there are V6 options, but most sales for 2015 are for the larger V8 power plants.If you decide to get a diesel engine, there is significant increase in fuel economy, but for the following list, we will only look at gasoline powered V8s.Ram 1500The Ram full-sized pickup is among the most popular trucks on sale. It offers a strong powertrain, nice ride, and a fuel-efficient 8-speed automatic transmission. The 5.7-liter V8 gets an average 17 mpg in combined city and highway driving.Ford F-150When you mention truck, many die-hard fans only think of one model—the Ford F-150. The first F-150 rolled off the assembly line in 1948 and it has never looked back. The latest 2015 model of this perennial favorite has an innovative all-aluminum body, which sheds 700 pounds from previous steel models. You can expect an average of 17 mpg for combined city and highway driving.Chevrolet Silverado 1500If you want an array of different styling choices along with a standout interior, you may be looking to buy this truck. The 4.3-liter engine had a 18 mpg average for combined city/highway, while the larger 6.2-liter V8 chalked up 17 mpg for city/highway combined.GMC Sierra 1500This truck offers a ride that is quiet with a variety of body shapes for the choosing. The V8 engines offer two sizes: the 5.3L with a combined 18 mpg for city/highway, and the larger 6.2L V8 with an average of 17 mpg for combined city/highway.Toyota TundraThese full-sized trunks are viable alternatives to American-made vehicles and can double as off-road vehicles too. But in the mpg arena, it suffers a bit because it lacks direct fuel injection. The 4.6-liter V8 gives an average of 16 mpg for combined city and highway driving, while the larger 5.7-liter V8 clocks in slightly more at 16.6 mpg for combined city/highway.Nissan TitanThis truck is your basic average truck—nothing fancy and nothing outstanding, and so it goes for its mpg rating as well. Interior and equipment options are so-so, and its 5.6L-V8 engine squeezes out 14 mpg for combined city and highway driving.Source: Edmunds.com