A Note About Severe Usage Condition Codes

If driving conditions include any of the following, refer to Severe Service.

Severe Usage Conditions
A: Repeated short trips.
B: Driving on rough and/or muddy roads.
C: Driving on dusty roads.
D: Driving in extremely cold weather and/or salted roads.
E: Repeated short trips in extremely cold weather.
F: not used.
G: not used.
H: Towing a trailer.