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Lubricant Recommendations for Engines that Use Heavy Fuel Oil
For 3600 Series Engines that use heavy fuel oil, select a lubrication oil that is specifically blended for use with heavy fuel oil. These oils are blended for use in centrifuges. The oils must release water and contaminants in the centrifuges without losing additives. Refer to Special Publication, SEBU7003, "3600 and C280 Diesel Engine Fluids Recommendations", "Engine Oil" for additional information that relates to lubrication for heavy fuel engines.Note: Currently, Caterpillar does not sell a brand of lubrication oil for use in engines that operate with heavy fuel oil. For the list of oils that have proof of performance, see Special Publication, LEDQ8363, "3600 Lube Oil Selection Brochure" or Special Publication, LEXQ7766, "3600 Engine Pocket Guide".Lubricant Capacities
The capacity of the engine lubrication system includes the capacity of the oil filters that are installed at the factory. Auxiliary oil filter systems (if equipped) will require additional oil. Refer to the specifications that are provided by the OEM of the auxiliary oil filter system.
Table 1
Approximate Refill Capacities for 3600 Series Engine Lubrication Systems
Compartment or System 3606 Engines 3608 Engines 3612 Engines 3616 Engines
Industrial Engines and Generator Set Engines
Standard oil pan 880 L (232 US gal) 1112 L (294 US gal) 1302 L (344 US gal) 1677 L (443 US gal)
Marine Engines
Engine crankcase (1) 731 L (193 US gal) 795 L (210 US gal) 943 L (249 US gal) 1091 L (288 US gal)
(1) Zero degree installationFuel
Heavy Fuel Oil
Recommendations for Heavy Fuel Oil
Caterpillar 3600 Series Engines have the capability to burn a wide range of heavy fuel oils. The 3600 Series Engines that are configured for using heavy fuel oil have a special fuel system. The engines also have special components for the combustion chamber. These features help to resist the corrosive elements that are found in heavy fuel oil. Because of those special features, DO NOT use heavy fuel oil in 3600 Series engines that are configured to use distillate fuel.
Heavy fuel oil, residual fuel, or blended fuel can be used in Caterpillar 3600 Series diesel engines that are configured to use heavy fuel oil.DO NOT use these types of fuel in 3600 Series diesel engines that are configured to use distillate diesel fuel. DO NOT use heavy fuel oil in C280 Series diesel engines. Failure to follow this recommendation will result in severe wear of components and engine failure.
3600 Series Engines that are properly configured can operate on fuel which is within the specifications that are listed in Table 2. The recommended specifications for heavy fuel oil will help to provide maximum service life and performance.
Table 2
Recommended "CIMAC G35" and "ISO RMG35" Specifications for Heavy Fuel Oil
Caterpillar 3600 Series Engines That Are Configured To Use Heavy Fuel Oil
Characteristic ASTM Test ISO Specification Bunkered Fuel
"CIMAC G35"
"ISO RMG35" Fuel that is Delivered to the Unit Injectors
Kinematic Viscosity "D445" "3104" 35 cSt at 100 °C (212 °F) maximum 10 to 20 cSt at 135 °C (275 °F) maximum (1)
Density "D287" "3675" 991 kg per m3 maximum at 15 °C (59 °F) (2)
"12185"
Flash point "D93" "2719" 60 °C (140 °F) minimum
Pour point "D97" "3016" 30 °C (86 °F)
Carbon residue - "10370" 18% maximum (weight)
Ash "D482" "6245" 0.15% maximum (weight) 0.10% maximum (weight)
Total sediment after settling - "10307-2" 0.10% maximum (weight)
Water "D1744" "3733" 1% maximum (volume) 0.1% maximum (volume)
Sulfur "D3605" "8754" 5% maximum (weight)
Vanadium (3) "D3605" "14597" 300 ppm maximum
Aluminum and silicon "D3605" "10478" 80 mg per kg (2) 5 mg per kg
Sodium (3) "D3605" - - 50 ppm maximum
Ratio for vanadium over sodium
(Va/Na) (3) - - - 5 minimum
Calcium "D3605" - - 40 mg per kg maximum
Zinc