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
1. Efficient Long Haul (over-the-road transport) service applies to vehicles that annually
travel more than 60,000 miles (96,000 kilometers) and average greater than 7 miles per
gallon with minimal city stop-and-go operation and minimum idle.
2. Long Haul (over-the-road transport) service applies to vehicles that annually travel more
than 60,000 miles (96,000 kilometers) and average greater than 6 miles per gallon with
minimal city stop-and-go operation.
3. Short Haul service applies to vehicles that annually travel up to 30,000 to 60,000 miles
(48,000 to 96,000 km) and average between 5.1 and 5.9 miles per gallon.
4. Severe service applies to vehicles that annually travel up to 30,000 miles (48,000 km) and
average less than 5 miles per gallon or that operate under severe conditions. Severe service
also applies to RV applications. Service applies to vehicles that annually travel up to 30,000
miles (48,000 km) or that operate under severe conditions. Only one of these conditions
needs be met to categorize an application as Severe Service.
5. Whichever comes first.
How to Procedures
104
All information subject to change without notice.
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