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Manufacturer-Run In-Use Testing Program Data for Heavy-Duty Diesel Engines

This page provides manufacturer-run in-use testing program data from heavy-duty diesel engine manufacturers in compliance with 40 CFR 86 Subpart T. The data are organized by test order year and have been redacted for Confidential Business Information but otherwise are as provided to EPA by the manufacturers. No test orders were issued in 2020 due to the Covid-19 pandemic.

2021
2019
2018
2017
2016
2015

2014
2013
2012
2011
2010
2009

Manufacturer-Run In-Use Testing Program Data for Heavy-Duty Diesel Engines

Compliance and Fuel Economy Data