

Ford fails to deliver on promised efficiency again




Ford C-Max



C-Max Hybrid on Fuelly

Prius V on Fuelly

Sources: Autoblog, CleanMPG

Comments     Threshold


By Mint on 3/1/2013 9:55:37 PM , Rating: 2
The EPA has the US06 test for higher speeds if you're interested, but that's unrelated to my qualms.

CleanMPG did steady state tests at various speeds, and at 50 MPH got 51 MPG with the CMax. The EPA highway test is mostly 45-55 with variation (which hurts MPG) and an acceleration + stop (also hurts MPG). Average speed is 48.3 MPH, not 45:

So how does the C-Max lose almost no efficiency (i.e. from 51 MPG down to 47) when going from steady speed to adding all the braking/accelerating of the EPA highway cycle?

If it really is legit (i.e. highly efficient regenerative braking), then why does it only appear in the EPA test and not in any other similar driving?

