When it comes to diesel trucks, the good old days weren't so good. Go back a quarter-century, for instance. Back then, a single diesel-powered truck was throwing off about 60 times the emissions a typical "clean diesel" truck does today. Cough.

The Diesel Technology Forum, citing data from IHS Automotive, is using that factoid to indicate how the growing use of newer technology clean diesel trucks and how they're starting to make a dent in emissions levels. Specifically, about a third of new diesel trucks last year used the latest in lower-emissions, clean-diesel technology, up from less than 10 percent in 2007. About half of the relatively new (2007 or newer) medium and heavy duty trucks in Indiana are clean-diesel, while Utah, Oklahoma, Texas and Wyoming all boast clean-diesel truck rates of more than 40 percent.

Heavy-duty truck emissions standards have been topical because of the large potential gains stemming from their low fuel efficiency and high-mileage use. In 2011, the Obama Administration laid out the first-ever fuel-economy standards for heavy-duty trucks, saying they needed to cut emissions and fuel use by 20 percent by 2018. Earlier this year, Obama asked for updates on those standards by March 2016. Check out the Diesel Technology Forum's press release below.
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Indiana (50.4%), Utah (45.4%) & Oklahoma (44.8%) Have Highest Percentage Of Clean Diesel Trucks

. . . Texas, California & Indiana Lead Nation in Total Number of Clean Diesel Trucks

Washington, D.C. – More than one-third of all medium and heavy duty commercial trucks registered in the United States – 2.9 million of 8.8 million trucks - are now equipped with newer technology clean diesel engines, according to new data compiled by IHS Automotive for the Diesel Technology Forum (DTF).

The new data includes total registration information on Class 3-8 trucks from 2007 through 2013 in all 50 states and the District of Columbia. Beginning in 2007, all heavy duty diesel trucks sold had to meet particulate emissions levels of no more than 0.01 grams per brake horse-power hour (g/HP-hr) - a level near zero.

"Because more than 95 percent of all heavy duty trucks are diesel-powered it is significant that more than one-third of these trucks are near zero emission vehicles," said Allen Schaeffer, the Executive Director of the Diesel Technology Forum. "Diesel trucks are literally the driving force behind goods movement in the U.S. and worldwide economies so the fact that the clean diesel fleet is increasing is good news for improved fuel efficiency and the environment. These new trucks are so clean that it now takes more than 60 of today's clean diesel trucks to equal the emissions from a single 1988 truck.

"Last year was the fifth consecutive year of increased penetration of the new clean diesel trucks in the fleet, reflecting the continuing confidence that American truckers have in the performance and fuel efficiency improvements of new technology diesel engines," Schaeffer said.

For more information about clean diesel trucks go to:


U.S. Clean Diesel Truck Growth by Year

2007 2008 2009 2010 2011 2012 2013
Percentage New Diesel Trucks 9.4% 13.9% 16.9% 20.1% 24.1% 28.6% 33.5%
Percentage Annual Increase -- +4.5% +3.0% +3.2% +4.0% +4.5% +4.9%
(Source: IHS Automotive, June 2014 for the Diesel Technology Forum)

2007 & Newer Diesel Truck Technology Are a True Environmental Success Story . . .

Reducing NOx By 99% & PM By 98%

"Emissions from today's diesel trucks and buses are near zero thanks to more efficient engines, more effective emissions control technology and the nationwide availability of ultra-low sulfur diesel fuel.The new clean diesel technology has reduced emissions from heavy-duty diesel trucks and buses by 99 percent for nitrogen oxides (NOx) and 98 percent for particulate emissions.

"In addition, model year 2010 and later trucks are experiencing an average of three to five percent improvement in fuel economy. Additional fuel-saving strategies are being developed to improve engine efficiency, vehicle aerodynamics and expanded application of hybrid technology."

How EPA's 2007/2010 Truck & Diesel Fuel Regulations Led To Near Zero Emissions

In December 2000, EPA adopted a rulemaking to establish stringent standards designed to reduce emissions from on-road heavy-duty trucks and buses by up to 95 percent and to cut the allowable levels of sulfur in diesel fuel by 97 percent.

Under the Environmental Protection Agency's 2007/2010 heavy-duty engine and highway diesel fuel sulfur control requirements, beginning with the 2007 model year, 100 percent of the new on-road diesel trucks were required to meet the near zero particulate emissions standards and 50 percent were required to meet the lower NOx exhaust standards. Beginning with the 2010 model year, 100 percent of the new on-road heavy-duty diesel engines were required to meet the NOx exhaust standards.

In addition, a sulfur cap of 15 parts per million (ppm) was instituted beginning June 1, 2006 for 80 percent of the diesel fuel sold by major refiners for use in highway vehicles. The 15 ppm sulfur cap was increased to 100 percent after December 31, 2010.

For more information go to: http://www.epa.gov/cleandiesel/index.htm

Texas, California & Indiana Have Most Overall Number of Clean Diesel Trucks . . .

New Technology Diesel Trucks States by Total (2007 & Newer)

Class 3-8

State Total
1) Texas 345,456
2) California 209,098
3) Indiana 204,653
4) Illinois 130,423
5) Pennsylvania 123,313
6) New York 110,611
7) Florida 107,288
8) Ohio 107,081
9) Oklahoma 87,532
10) North Carolina 82,622
National Total 2,966,311
(Source: IHS Automotive, June 2014 for the Diesel Technology Forum)

Texas, Indiana & California Have Most Post-2010 Clean Diesel Trucks . . .

New Technology Diesel Trucks States by Total (20011 & Newer)

Class 3-8

State Total
1) Texas 170,556
2) Indiana 116,280
3) California 82,033
4) Pennsylvania 61,931
5) Illinois 58,157
6) Oklahoma 52,078
7) Ohio 49,822
8) New York 45,762
9) Florida 42,608
10) Missouri 37,996
National Total 1,396,771
Indiana, Utah & Oklahoma Have Highest Percentage of Clean Diesel Trucks . . .

New Technology Diesel Trucks States by Percentage (2007 & Newer)

Class 3-8

State Percentage
1) Indiana 50.4%
2) Utah 45.4%
3) Oklahoma 44.8%
4) Texas 41.9%
5) Wyoming 41.4%
6) Louisiana 37.8%
7) Nebraska 37.5%
8) Montana 37.4%
9) Maryland 37.2%
10) Rhode Island 36.5%
National Percentage 33.5%
Indiana, Oklahoma & Utah Have Highest Percentage of Post-2010

Clean Diesel Trucks . . .

New Technology Diesel Trucks States by Percentage (2011 & Newer)

Class 3-8

State Percentage
1) Indiana 28.7%
2) Oklahoma 26.6%
3) Utah 23.4%
4) Texas 20.7%
5) Nebraska 20.5%
6) Wyoming 20.3%
7) Tennessee 19.5%
8) Montana 19.0%
9) Louisiana 18.5%
10) Missouri 18.2%
National Percentage 15.8%
Oklahoma, Kansas & North Dakota Have Fastest Growth of Clean Diesel Trucks...

Fastest Growth All Diesel Passenger Vehicles 2012-2013

Class 3-8

State Percentage
1) Oklahoma +36.6%
2) Kansas +30.9%
3) North Dakota +29.1%
4) California +23.8%
5) Rhode Island +23.3%
6) South Dakota +22.0%
7) Virginia +21.9%
8) Minnesota +21.1%
9) Colorado +20.9%
10) Texas +20.8%
Ohio +20.8%


The Diesel Technology Forum is a non-profit national organization dedicated to raising awareness about the importance of diesel engines, fuel and technology, and working with policymakers and other stakeholders on common solutions. Forum members are leaders in clean diesel technology. For more information visit www.dieselforum.org.

For the latest insights and information from the leaders in clean diesel technology, join us on Facebook, follow us on Twitter@DieselTechForum, or YouTube@DieselTechForum and connect with us on LinkedIn.

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