Full-size trucks are rarely known for being fuel-efficient but Ford is hoping to change that by making engine start/stop systems standard equipment on all 2017 F-150s with EcoBoost engines.

The announcement means trucks equipped with the 2.7- and 3.5-liter EcoBoost engines - including the Raptor - will come with a start/stop system that automatically shuts off the engine when the vehicle is at a stop.  The system has been specifically designed for truck applications and won't kill the engine when the truck is in towing or four-wheel drive mode.

Ford declined to say how much fuel owners can expect to save but noted fuel economy is largely dependent on driving patterns.  The company also pointed out the engine start/stop system will lower CO2 emissions as it reduces the amount of time the truck spends idling.

The popularity of EcoBoost engines is soaring and Ford estimates that more than 60 percent of its truck lineup could have a start/stop system thanks to the decision to make the fuel saving system standard equipment.  The automaker notes this would give the F-150 the "highest number of Ford nameplates offering standard Auto Start-Stop technology."

Gallery: Ford F-150 gains engine start/stop system on EcoBoost models

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