In brief
ZF's OptiFlow Flap is a mud flap with an aerodynamically shaped structure. The manufacturer links claimed outcomes to a particular simulation rather than universal savings on every trip.
Useful to know
ZF's OptiFlow Flap is a mud flap with an aerodynamically shaped structure. The manufacturer links claimed outcomes to a particular simulation rather than universal savings on every trip. [1]
Read consumption figures accordingly. Compare trailer size, route and conditions with the test before treating a percentage as a fleet-wide promise.
Sources
For further detail and to check the information: