theholycow wrote:Bump. Are they a year closer to their goal?
They haven't made tons of progress that I've seen.
According to wikipedia:
For non-electric vehicles (called micro-hybrids,) fuel economy gains from this technology are typically in the range of 5 to 10 percent.
Several different manufacturers claim around 10% gains using stop-start.
AAA apparently did a study and thinks:
the system [stop-start] can improve fuel economy up to 12 percent and contribute to a reduction in vehicle exhaust emissions.
I have no problem with start-stop, especially if it can make a 10% difference in fuel economy. My drive isn't bad, but if I get stopped at a light, it's usually for 30 seconds-1 minute because they are mostly large, even distribution intersections. If I got a 10% increase on the Fiesta, I would get 36-37 mpg rather than 32-33 mpg (no A/C driving for the past few months mostly).