DETROIT — In an effort to re-energize confidence in the company’s future, Ford Motor Co. has been shuttling hundreds of employees and retirees to its top-secret test track in Dearborn, Mich., almost every afternoon, to drive the company’s promising vehicles of the future.

The “Drive One” effort began last week and will wrap up Aug. 28, after an estimated 4,000 employees and retirees have had the rare experience of driving vehicles like the next-generation Mustang and Fusion that are to go on sale early next year and have not been revealed to the public.

Ford also let them test the power-trains of the future: an electric Ford Ranger compact pickup, a plug-in gasoline-electric hybrid Escape that the carmaker has been testing with Southern California Edison, and several car models like the new Lincoln MKS, with EcoBoost engine technology.

EcoBoost is a Ford-branded combination of gasoline-injection and turbocharging for up to a 20 percent improvement in fuel economy. Ford has not said how much it will charge for EcoBoost, but it promised that consumers will see a financial return on an EcoBoost engine faster than they do on a hybrid.

Spokeswoman Sara Tatchio said the carmaker is not bringing the current Mondeo to the United States.