Boost Auto Explainer Have you ever rented a trailer only to discover that your new vehicle can't actually tow the rented trailer? If the answer is yes, you'll know having multiple standards is a pain. The WLTP “Worldwide harmonized Light-duty vehicles Test Procedure” standard has created a better (i.e. more realistic) fuel economy testing programme for passenger vehicles. It replaced the NEDC (New European Driving Cycle) test that has been around virtually unchanged since 199