The F-150s with naturally aspirated engines see the biggest gains. The 3.3-liter V6 with two-wheel drive picks up a mile per gallon in the city and highway, and two miles for the combined rating. That brings it up to 19 mpg city, 25 mpg highway, and 22 mpg combined. The four-wheel-drive version also improves over last year's with an extra mile per gallon in the city and combined for totals of 18 city, 23 highway, and 20 combined. The 5.0-liter V8 with two-wheel drive improves over the 2017 iteration with two miles in the city, and one each for highway and combined, giving it 17 city, 23 highway, and 19 overall. The four-wheel-drive version improves by one mile per gallon across the board for numbers of 16 city, 22 highway, and 18 overall.
Only one of the EcoBoost turbocharged engines improves for 2018, and it's the smaller 2.7-liter model. The two-wheel-drive model only gets an extra mile per gallon in the city bringing it up to 20. The 26 mpg highway and 22 mpg combined numbers are unchanged. The four-wheel-drive version sees a more substantial improvement of one mile per gallon for all categories. It's ratings are 19 city, 24 highway, and 21 overall.
Even though the 3.5-liter twin-turbo F-150 doesn't see improved fuel economy, it does get better towing capacity. The new model has a maximum towing capacity of 13,200 pounds. That's a gain of half a ton over the 2017 model. Ford didn't provide numbers for the rest of the lineup, so we presume those numbers remain unchanged.
The only powertrain not covered is the diesel engine. Ford has said previously that it will have the best tow ratings yet for an F-150, so it will have over 13,000 pounds of towing ability. We also expect it will be more efficient than the 2.7-liter EcoBoost. We will probably get more specific details closer to the engine's launch next year.