- The 2015 Chevrolet Impala with the base four-cylinder 2.5-liter Ecotec engine will come standard with fuel-saving stop-start technology, GM said on Thursday.
- Stop-start systems save fuel and reduce emissions by shutting down the vehicle's engine and then restarting it automatically to decrease idling time.
- Although stop-start systems are commonplace on hybrids, many automakers have begun including the technology on non-hybrid vehicles.
DETROIT — The 2015 Chevrolet Impala with the base four-cylinder 2.5-liter Ecotec engine will come standard with fuel-saving stop-start technology, GM said on Thursday.
This feature will improve the car's fuel economy by almost 5 percent, or about 1 mpg, which gives the Impala an EPA-estimated economy rating of 22 mpg in city driving and 31 mpg on the highway, according to the automaker.
GM notes that stop-start will not be included with Impalas equipped with the optional 3.6-liter V6 engine.
Stop-start systems shut down the vehicle's engine and then restart it automatically to reduce idling time under certain conditions, such as when stopped at traffic lights or stuck in traffic. The result is a reduction in emissions and, as previously reported by Edmunds, fuel savings generally in the 3-10 percent range.
The 2015 Impala is the second Chevrolet model to be equipped with standard stop-start technology. It was first introduced on the 2014 Malibu, which GM says achieved an impressive 14 percent increase in fuel economy.
Ford made start-stop an option on the 2013 Fusion SE EcoBoost model and has included it with the 2.7-liter EcoBoost V6 engine on the all-new 2015 F-150 pickup. Ford says it will have stop-start on 70 percent of its vehicles for the North American market by 2017.
The first Chrysler model, other than hybrids, to feature stop-start was the 2013 Ram 1500 equipped with either the 3.6-liter V6 Pentastar engine or the 5.7-liter Hemi V8. Chrysler has also built stop-start into the redesigned 2015 Chrysler 200 sedan and, a Chrysler source told Edmunds, will expand the technology to other vehicles in its lineup.
Although stop-start systems are commonplace on hybrid vehicles, many other automakers are relying on the technology to boost fuel economy and help meet emissions standards on non-hybrid models, including BMW, Honda, Mercedes, Nissan, Porsche and Toyota.
According to Johnson Controls, which has manufactured stop-start systems for the global market since 2001, the number of vehicles equipped with the technology could account for 40 percent of new-car production by 2018.
Edmunds says: Stop-start offers one more way for automakers to boost fuel economy and reduce emissions even in non-hybrid models like the 2015 Chevrolet Impala.