NGV Engine Studies
- Southwest Research Institute “Paper Study On The Effect of Varying Fuel Composition On Cummins Gas Engines” – December 13, 2004 (Adobe PDF, 237 KB)
- Southwest Research Institute “Paper Study On The Effect of Varying Fuel Composition On Fuel Supplied To Detroit Diesel Engines” – March 15, 2005 (Adobe PDF, 184 KB)
- Gas Technology Institute “Light-Duty CNG Vehicle Fuel Composition Study” – April, 2006 (Adobe PDF, 389 KB)
- SoCalGas/SDG&E “Southern California Heavy-Duty CNG Vehicle Report” – March 30, 2009 (Adobe PDF, 512 KB)
NGV Engine Test Reports
- Southwest Research Institute “Fuel Composition Testing Using Series 50G Natural Gas Engines” – August, 2006 (Adobe PDF, 3.6 MB)
- Southwest Research Institute “Field Test for Transit Buses With DDC Series 50 Natural Gas Engines On A Low Methane Number Fuel” – June, 2007 (Adobe PDF, 2.1 MB)
- Southwest Research Institute “Fuel Composition Testing Using Cummins, John Deere, and Detroit Diesel Natural Gas Engines” – April, 2009 (Adobe PDF, 5.3 MB)
- Southwest Research Institute “Natural Gas Fuel Effects on Vehicle Exhaust Emissions and Fuel Economy” – January, 2010 (Adobe PDF, 3.7 MB)
Information Related to Proposed Revisions of the CARB CNG Fuel Specification Regulations
- Sierra Research “Effects of Gas Composition on Emissions from Light-Duty Natural Gas Engines” – November 16, 2009 (Adobe PDF, 174 KB)
- SoCalGas/SDG&E Transmittal Letter to CARB – February 12, 2010 (Adobe PDF, 58 KB)
- Sierra Research Effects of Gas Composition on Emissions from Heavy-Duty Natural Gas Engines” February 24, 2010 (Adobe PDF, 1.1 MB)
Updated 3/2010