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Publication Title | Cerium Oxide Fuel Additive

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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Telephone: (818) 734-5300 • Facsimile: (818) 734-5320 • Website:

Service Notice SN0017

Date: From: Subject:


All Capstone MicroTurbines using diesel fuel.


The fuel additive cerium oxide, used to improve diesel fuel combustion, has been found to deposit residue inside MicroTurbine fuel injectors. The brownish-colored deposits generally cover the air annulus without affecting fuel flow (see Figure 1). Over time, the buildup will compromise air flow, thus causing combustion problems including problems with starting and increased emissions.

Capstone recommends that the use of cerium oxide as a fuel additive be discontinued immediately.

Figure 1 – Examples of Cerium Oxide Deposits in MicroTurbine Fuel Injectors

450074 Rev A (December 2007) Page 1 of 2

This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.

December 2007

Capstone Technical Support Cerium Oxide Fuel Additive

Image | Cerium Oxide Fuel Additive

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