Holiday imperial 2001, Owner'S Manual, Page: 268 / 301

Chassis Information
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I M P E R I A L
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from difficulty in starting to increasing fuel consumption and reducing power
output. When the oil is too thin, oil consumption is increased as well as wear
from the metal to metal contact. This will also increase engine noise.
Low temperature viscosity specifications are identified by a “W” (winter).
High temperature viscosity that meets the 100º C (212º F) requirements have
no suffix. When a lubricating oil meets both high and low temperature
requirements they are classified as multi-viscosity or multigrade.
Routine Maintenance Recommendations:
1. Check oil level daily.
2. Replace oil filter at every oil drain interval.
3. Cummins Engine Company, Inc. recommends the use of high quality,
API (American Petroleum Institute) licensed CH-4 or CES20071,
15W-40, multi-viscosity oil or premium oil.
4. The recommended oil drain interval is defined by the API oil perform-
ance classification and the engine duty cycle. Refer to the Cummins
Operation and Maintenance Manual for complete details.
It is possible to operate diesel engines in extremely cold environments.
The engine should be properly prepared and maintained. The correct lubri-
cants, fuels and coolant MUST be used for the cold weather range for which
the motorhome is being operated. Cold weather operation can be defined in
two categories: Winterize and Arctic.
NOTE: Refer to the Operations and Maintenance Manual for
more detailed information.
WINTERIZE (32º to -25º F) (0º to -32º C)
Use a 50 antifreeze / 50 water coolant mixture, use multi-viscosity oil
meeting Cummins specifications and fuel to have maximum cloud pour
points 10º F (6º C) lower than the ambient temperature in which the motor
home operates.
ARCTIC (-25º to -65º F) (-32º to -52º C)
Use a 60 percent antifreeze / 40 water coolant mixture, use oil meeting
Cummins specifications and fuel to have maximum cloud pour points 10º F
(6º C) lower than the ambient temperature in which the motorhome operates.
Oil Recommendations
- Cold Weather