What is the EPA 511 Protocol?
The EPA 511 Test Protocol is an EPA collective term used to describe two Federal Test Procedures (FTP): • FTP-75 Urban Drive Trace, which measures regulated emissions and fuel efficiency in simulated city driving. • Highway Fuel Economy Test (HFET), which measures regulated emissions and fuel efficiency in simulated highway driving. The regulating authority for each test is 40 Code of Federal Regulations, parts 86 and 600. These tests are conducted under laboratory conditions in strict accordance with Federally mandated procedures. The EPA 511 is the only test procedure recognized as valid and indisputable for aftermarket retrofit devices that claim to reduce emissions and/or increase fuel efficiency.
