BYD F3/F3R Owner's Manual page 187

Maintenance schedule requirements
Your BYD F3/F3R needs to be serviced in accordance with the normal maintenance schedule. (see "Maintenance Schedule")
If you mainly operate your BYD F3/F3R under one or more of the special operating conditions below, some of the maintenance schedule items
need to be serviced more frequently.
B. Road condition
1. Operating on rough, muddy or melted-snow roads
2. Operating on dusty roads
F3/F3R OWNER'S MANUAL
C. Driving condition
1. Daggling trailers, using camp trailers or the top bracket
2. Performing repeated short trips (within 8 km) while the outside
temperature remains below freezing
3. Performing extensive idling and /or low speed driving for a long
distance such as police cars, taxis or door-to-door calls
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