Gasoline Deposit Control Additives
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Information below regarding deposit control additives in gasoline and their effect on combustion chamber deposits and the resulting effect on emissions.
Current Regulations
The regulations for required additives in gasoline are in section 2257 of the CARB Motor Vehicle Gasoline Regulations (Title 13, CCR, Sections 2250-2273.5, reflecting amendments effective February 16, 2014)
Certification Activity
Executive Order: G-696 Gasoline Containing Additives
Any gasoline sold for on-road use in California must be certified for deposit control additives, as promulgated in California Code of Regulations, Title 13, Section 2257. To certify a gasoline formulation, the gasoline marketer must submit a written application to the Air Resources Board (CARB). The application must describe the additive formulation, specify the minimum dosage rate, and include test data showing that the formulation passes testing required to demonstrate engine cleanliness for port fuel injectors, intake valves, and combustion chambers. The testing is performed with an CARB-approved test fuel in accordance with ASTM D5598 and ASTM D5500, which are each 10,000-mile tests, and the test results are reviewed by CARB engineers. Upon approval of the application, the executive officer issues a certification. If you have any questions regarding this set of Executive Orders, please contact the Fuels Program.
Enforcement of Gasoline Deposit Control Additives
Board Hearing Documents
Public Meetings and Documents
| Date | Description & Materials |
|---|---|
| November 7, 2014 | PFI Certification Fuel and IVD and CCD Test Method Advisory |
| July 29, 2009 | Third Advisory Letter Regarding Certification Test Fuels |
| January 31, 2007 | 2006 Silver Corrosion Inhibitor Survey Notification Letter (pdf) and Survey (doc) or Total Package (pdf) |
| January 31, 2007 | 2005 Silver Corrosion Inhibitor Survey Advisory Letter and Survey Package |
| June 18, 2001 | Advisory Letter Regarding Certification for Phase 3 Gasoline |
| April 21, 2001 | Second Advisory Letter Regarding Certification Test Fuels |
| December 21, 2000 | Advisory Letter Regarding Certification Test Fuels |
| August 1999 | Advisory Letter for 1998 Amendments to the Gasoline Deposit Control Additive Regulation |
| July 24, 1998 | Workshop Notice |
| June 11, 1998 | Workshop Notice |
| March 24, 1998 | Workshop Notice |
Other Information
- Test Method for Evaluating Formation of Intake Valve and Combustion Chamber Deposits in Motor Vehicles
- Information on intake valve deposits and port fuel injector deposits were included as part of the California Phase 1 Reformulated Gasoline (CaRFG1) regulations.