FTP-75

The EPA Federal Test Procedure, commonly known as FTP-75 for the city driving cycle, are a series of tests defined by the US Environmental Protection Agency (EPA) to measure tailpipe emissions and fuel economy of passenger cars (excluding light trucks and heavy-duty vehicles).

[7] It is alleged that, similarly than in the NEDC, some automakers overinflate tyres, adjusting or disconnecting brakes to reduce friction, and taping cracks between body panels and windows to reduce air resistance, some go as far as removing wing mirrors, to inflate measured fuel economy and lower measured carbon emission.

[8] In addition, it has been brought to attention that the relative height of the simulated wind fan with respect to the vehicle could alter the performance of aftertreatment systems due to changes in temperature and, consequently, modify the pollutant emissions values.

The following are some characteristic parameters of the cycle: Before the 5-cycle fuel economy estimates were introduced in 2006 the measurements were adjusted downward by 10% (city) and 22% (highway) to more accurately reflect real-world results.

[5][13] The US06 Supplemental Federal Test Procedure (SFTP) was developed to address the shortcomings with the FTP-75 test cycle in the representation of aggressive, high speed and/or high acceleration driving behavior, rapid speed fluctuations, and driving behavior following startup.

SFTO SC03 is the air conditioning test, which raises ambient temperatures to 95 °F (35 °C), and puts the vehicle's climate control system to use.

A 200 W electrical load can produce a 0.94 mpg (0.4 km/L) reduction in efficiency on the FTP 75 cycle test.