SECTION 2 – REQUIREMENTS FOR FUEL, ENGINE OIL, AND COOLANT
Engine Oil
ENGINE OIL QUALITY AND SERVICE CATEGORIES
TheAmericanPetroleumInstitute(API)defines engine oil quality
by service categories that define oil performance measured in
standardized engine tests.
API CJ-4 FOR HIGH PERFORMANCE DIESEL ENGINES
Figure 9 API Identification symbol
API CJ-4 oils are recommended for high speed diesel engines
with advanced exhaust aftertreatment systems that meet 2007
and beyond on-highway exhaust emission standards.
NOTE: Mineral and synthetic oils are acceptable for u se
provided they meet the API category recommendations and
ambient temperature guidelines.
API CJ-4 oils provide protectio n against the following:
• Catalyst poisoning and particulate blockage
• Engine wear
• Piston de posits
• Soot related viscosity increase, deposits, and wear
• Viscosity loss due to shear
• Oxidative thickening
• Oil foaming and aeration
API CJ-4 oil, in combin ation w ith Ultra Lo w Sulfur Diese l
(ULSD) fuel [0.0015% (15 ppm) maximum sulfur content],
is recomm en d ed t o m aintain performance and d ura bility o f
aftertreatment systems meeting 2007 and beyond diesel
emission regulations.
API C I-4 oils a re allowed in die sel engines that meet the s e
regulations. Use of the CI-4 engine oil shortens Diesel
Particulate Filter (DPF ) clea nin g service in tervals.
Form No. 1172040R1
Page 32
Printed in the United States of America
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