Sales of Ford’s F-150 equipped with the EcoBoost engine, launched less than three years ago, have topped 400,000 units in the United States.

Ford explained in total, F-150 EcoBoost owners collectively are saving an estimated 45 million gallons of gas annually

“Ford is delivering great fuel economy across our lineup, from EcoBoost in our F-150 and 15 other vehicles to our electrified vehicles,” says Doug Scott, Ford truck group marketing manager. “Fuel economy is the No. 1 unmet need for truck customers, which is why the F-150 EcoBoost’s leading combination of fuel economy and capability is resonating so well.”

Ford’s estimated fuel savings are based on the EPA-estimated combined ratings for 2011-13 F-150 EcoBoost models and for the same mix of 5.4-liter V8-equipped 2010 F-150 models, across 400,000 units and 15,000 miles of driving a year. F-150 EcoBoost sales are comprised mostly of 4×4 trucks with EPA-estimated ratings of 15 mpg city and 17 mpg combined, and a smaller percentage of 4×2 trucks with EPA-estimated ratings of 16 mpg city and 18 mpg combined.

Ford said it considers having had success transitioning many customers to the new EcoBoost offering.

According to the company, the F-150 EcoBoost helped the F-Series surpass 60,000 sales in October, the sixth-straight month it achieved this milestone – and the first time since the period of April through September 2006. Ford said this includes outselling the nearest competitor in the western United States by 67 percent, where the housing and technology industries are driving truck sales and where EcoBoost technology is proving particularly popular.

Still per Ford, on the U.S. northwest, F-150 customers choose EcoBoost 45 percent of the time compared to the national average of 38 percent. Oregon and Washington – the second- and third-fastest growing states, respectively, according to a June CNN Money report – are key markets for F-150 EcoBoost sales.

“F-150 EcoBoost is a great example of how our customers save at the pump while outworking the competition,” says Scott.

Ford recently celebrated the 2-millionth EcoBoost engine produced globally since the 2009 launch of the engine line. Factory output now averages more than 100,000 EcoBoost engines per month, up from 65,000 units in 2012.

“Ford EcoBoost can deliver great performance and lower fuel bills, a recipe that is proving incredibly popular with consumers around the world,” says Joe Bakaj, vice president, powertrain engineering for Ford. “EcoBoost engines are attracting new customers to the Ford brand every day, and our plants are working hard to keep up with demand.”

The EcoBoost technology combines smaller overall size with turbocharging, direct injection and variable valve timing to bring customers the same performance as a bigger displacement engine while returning better fuel economy.

For 2014, the EcoBoost technology will be available on more than 90 percent of Ford’s North American nameplates, rising to 95 percent by 2015.