Table 31.
Extended Life Coolant Maintenance Intervals (also known as OAT):
Service
Application
Efficient
Long Haul
1
Long
Haul
2
Short
Haul
3
Severe
4
Action
Required
Engine
Series
DD8
Not
Applicable
Every
120,000
miles
(193,000 km)
or 1 year
5
Every
110,000
miles
(177,000 km)
or 1 year
5
Every 72,000
miles
(145,000 km)
or 1 year
5
1. Efficient Long Haul is not applicable to the DD8 engine.
2. Long Haul service (over-the-road transport) applies to vehicles that annually travel more
than 60,000 miles (96,000 km) and average greater than 8.5 miles per gallon with minimal
city stop-and-go operation. Examples of Long Haul service are: regional delivery that is
mostly freeway mileage, interstate transport, and any road operation with high annual
mileage.
3. Short Haul service applies to vehicles that annually travel up to 60,000 miles (96,000 km)
and average between 6.5 and 8.5 miles per gallon and operate under normal conditions.
Examples of Short Haul service are: operation primarily in cities and densely populated
areas, local transport with infrequent freeway travel, or a high percentage of stop-and-go
travel.
4. Severe service applies to vehicles that average below 10.0 miles per gallon or that
operate under severe conditions. Examples of Severe Service are: idle time over 40%, load
factor over 55%, operation on extremely poor roads or under heavy dust accumulation;
constant exposure to extreme hot, cold, salt-air, or other extreme climates; frequent short-
distance travel; construction-site operation; or farm operation. Only one of these conditions
needs be met to categorize an application as Severe Service.
5. Whichever comes first.
How to Procedures
106
All information subject to change without notice.
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