Maintenance Schedules Defined

There are two maintenance schedules that show the required service for your vehicle.

First is Severe Service. It is for vehicles that are operated under the conditions that are listed below.

- Frequent short trips where the engine does not achieve full operating temperature (operating temperature defined as 190° F (66° C) coolant temperature).

- Extensive engine idling (over 10 minutes per hour of operation) at ambient temperatures less than 32° F (0° C).

- Driving in dusty conditions.

- Frequent trailer towing.

- Taxi, police, or delivery service (commercial service).

- Off-road or desert operation.

- Extensive operation at high engine speeds (greater than 2900 rpm) and loads (greater than 70% throttle).

Note: Most vehicles are operated under the conditions listed for Severe Service Schedule.

Second is Routine Service. It is for vehicles that are not operated under any of the conditions listed under Severe Service Schedule.

Use the schedule that best describes your driving conditions. Where time and mileage are listed, follow the interval that occurs first.

CAUTION: Failure to perform the required maintenance items may result in damage to the vehicle.