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2017 Ford F-150 3.5-Liter, Raptor Models Add Engine Stop-Start

Saving gas, one red light at a time.

More versions of the Ford F-150 will have engine stop-start for the 2017 model year. The pickup truck will add stop-start on its 365-hp, 3.5-liter EcoBoost V-6 engine, as well as on the high-performance 3.5-liter in the upcoming Raptor. The truck's 325-hp, 2.7-liter EcoBoost V-6 already offered stop-start.

In the 2017 Ford F-150, the stop-start function won't activate if the truck is towing or if its four-wheel drive is engaged. Other times, however, the system automatically cuts the engine when the car is idling to save fuel. Fuel-economy estimates for updated 2017 Ford F-150 models with stop-start are not yet available.

Stop-start still won't be offered on the F-150's 385-hp, 5.0-liter V-8 engine, but Ford says that currently about 60 percent of all F-150s are sold with either the 2.7- or 3.5-liter EcoBoost engines. The Chevrolet Silverado 1500 and GMC Sierra 1500, by contrast, do not offer an engine stop-start feature. The Ram 1500 only offers it on its low-volume HFE model.

The 2017 Ford F-150 Raptor will also be the first time the high-performance, off-roading model has offered stop-start. While we still don't know how much power the new Raptor will produce, Ford has promised it will be more than the 411 hp and 434 lb-ft of torque available in the old Raptor's 6.2-liter V-8.

Stay tuned for updated fuel-economy figures when the 2017 Ford F-150 goes on sale this fall.