Since Formula One introduced its hybrid engines a year ago, perhaps the most compelling aspect of the series apart from the racing itself has been the unfolding of the sport’s love-hate relationship with its new environmentally friendly technology.

The new 1.6-liter, hybrid turbo engines use a third less fuel than their V-8, 2.4-liter, normally aspirated predecessors and produce at least double the hybrid energy — as well as far less noise. But whether a team, engine provider or other interested party considers the project a success or a failure depends on the results on the track.

For the Mercedes car manufacturer and its team, which won the titles last year and is leading the series heading into the fourth race of the current season, the Bahrain Grand Prix this weekend, the program is not only an astounding success, but an essential factor in the German company wanting to continue in Formula One.

“For us, the current technology is an important part of our involvement,” said Toto Wolff, the head of the Mercedes racing program. “Our marketing strategy focuses on the hybrid technology of Formula One.”