FORD 2011 Crown Victoria v.2 - Manual (Page 317)

SPECIAL OPERATING CONDITIONS
If you operate your vehicle primarily in one of the more demanding
conditions listed below, you will need to have some items maintained
more frequently. If you only occasionally operate your vehicle under
these conditions, it is not necessary to perform the additional
maintenance. For specific recommendations, see your dealership service
advisor or technician.
Towing a trailer or using a camper or car-top carrier
Inspect frequently, service as
required
– Inspect and lubricate U-joints
– See axle maintenance items under Exceptions
Every 5,000 miles (8,000 km) – Inspect wheels and related components for abnormal
noise, wear, looseness or drag
– Rotate tires, inspect tires for wear and measure tread
depth
Every 5,000 miles (8,000 km) or
6 months
– Change engine oil and filter
– Inspect and lubricate U-joints
Every 30,000 miles (48,000 km) – Change automatic transmission fluid (except 6R80
transmission)
Every 60,000 miles (96,000 km) – Change manual transmission fluid
Scheduled Maintenance Guide
317
2011 Crown Victoria (cro)
Owners Guide, 2nd Printing
USA (fus)