808584 Mercury POWER JET (135 - WMH-28)

This engine meets EPA Tier 2, Euro Stage II, or MOC Step 2 emission regulations. A 500 hour engine oil change interval is available, provided that operating conditions and recommended multigrade oil types are met. When these requirements are not met, shorten the oil change interval to 250 hours, or use an S O S oil sampling and analysis program to determine an acceptable oil change interval.If you select an interval for oil and filter change that is too long, you may damage the engine.
Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin.
Caterpillar oil filters are recommended for oil changes. Recommended multigrade oil types are listed in Table 1. Do not use single grade oils.
Illustration 1 g00783061
API TrademarkCommercial oils that are licensed by the American Petroleum Institute (API) bear this trademark. Commercial oils that do not bear this trademark are not licensed and these oils are not recommended. Oils that are not listed in Table 1 are not recommended.Abnormally harsh operating cycles or harsh environments can shorten the service life of the engine oil. Arctic temperatures, corrosive environments, or extremely dusty conditions may require a reduction in engine oil change intervals from the recommendations in Table 1. Poor maintenance of air filters or of fuel filters requires reduced oil change intervals. See your Caterpillar dealer for more information if this product will experience abnormally harsh operating cycles or harsh environments.
Table 1
Oil Change Interval for C-9 Industrial Engine (1)    
Multigrade Oil Type     Operating Conditions    
    Severe    
Normal (2) High Load Factor above
43 L (11 US gal per hour of fuel)
(3)     Fuel Sulfur from 0.3% to 0.5%     Altitude above
1830 m (6000 ft)    
(4)
Cat DEO
Preferred     500 hr     250 hr     250 hr     250 hr (6)    
API CH-4
11.0 minimum TBN (4)
Preferred     500 hr     250 hr     250 hr     250 hr (6)    
API CH-4
TBN (4) below 11.0     500 hr     250 hr     250 hr (5)     250 hr (6)    
API CG-4     500 hr     250 hr (5)     250 hr (5)     250 hr (6)    
API CF-4     250 hr (5)     250 hr (6)     250 hr (6)     250 hr (6)    
( 1 ) The standard oil change interval in this engine is 500 hours, if the operating conditions and recommended oil types that are listed in this table are met. Refer to the applicable Operation and Maintenance Manuals for the other engines.
( 2 ) Normal conditions include these factors: Fuel sulfur below 0.3%, altitude below 1830 m (6000 ft) and good air filter and fuel filter maintenance. Normal conditions do not include high load factor, harsh operating cycles, or harsh environments.
( 3 ) High load factors can shorten the service life of your engine oil. Continuous heavy load cycles and very little idle time result in increased fuel consumption and oil contamination. These factors deplete the oil additives more rapidly. If the average fuel consumption of your engine exceed 43 L (11 US gal) per hour, follow the "High Load Factor" recommendations in Table 1. To determine average fuel consumption for your engine, measure average fuel consumption for a period of 50 to 100 hours. If the application of the engine is changed, the average fuel consumption may change.
( 4 ) For sulfur content above 0.5%, refer to, "Total Base Number (TBN) and Fuel Sulfur Levels for Direct Injection (DI) Diesel Engines" in Special Publication, SEBU6251, "Caterpillar Commercial Diesel Engine Fluids Recommendations".
( 5 ) In order to verify an oil change interval of 500 hours, refer to "Program A" below.
( 6 ) Use "Program B" below to determine an appropriate interval.Adjustment of the Oil Change Interval
Note: Your Caterpillar dealer has additional information on these programs.Program A
Verification for an Oil Change Interval of 500 HoursThis program consists of three oil change intervals of 500 hours. Oil sampling and analysis is done at 250 hours and 500 hours for each of the three intervals for a total of six oil samples. The analysis includes oil viscosity and infrared (IR) analysis of the oil. If all of the results are satisfactory, the 500 hour oil change interval is acceptable for the engine in that application. Repeat Program A if you change the application of the engine.If a sample does not pass the oil analysis, take one of these actions:
Shorten the oil change interval to 250 hours.
Proceed to Program B.
Change to a preferred oil type in Table 1.Program B
Optimizing Oil Change IntervalsBegin with a 250 hour oil change interval. The oil change intervals are adjusted by increments. Each interval is adjusted an additional 50 hours. Periodic oil sampling and analysis is done during each interval. The analysis includes oil viscosity and infrared (IR) analysis of the oil. Repeat Program B if you change the application of the engine.If an oil sample does not pass the analysis, shorten the oil change interval, or change to a preferred multigrade oil type in the listing above.References
Reference: Form, PEDP7035, "Optimizing Oil Change Intervals"Reference: Form, PEDP7036, "S O S Fluid Analysis"Reference: Form, PEDP7076, "Understanding the S O S Oil Analysis Tests"