Learning to trust fuel economy test results

July 22, 2022

That probably sounds strange coming from a person who is a fuel economy testing evangelist. To be clear, I believe in testing devices to ascertain what type of fuel economy gains they can achieve. However, not all testing methods are equal, nor are all test results directly translatable to real-world fuel savings. And real-world fuel savings are what fleet managers are interested in.

What happens in a wind tunnel, via computer simulation and even on a test track is not necessarily valid if the fleet is not going to see the alleged fuel economy gains when their actual trucks are in operation and spec’d with the tested device.