The Michelin owners manual can be found here:
In their section on tire rotation they recommend the following on page 14 (emphasis mine):
To obtain maximum tread life, it is necessary to rotate your tires. Michelin
recommends rotating your tires every 6,000 to 8,000 miles (10,000 to
12,000 km), or as specified by your vehicle manufacturer, whichever
rotation period is less. Check your vehicle owner’s manual for any
recommendations by your vehicle manufacturer. Monthly inspection for
tire wear is recommended. Your tires should be rotated at the first sign of
irregular wear, even if it occurs before 6,000 miles (10,000 km).
They also state this in regards to their treadwear warranty on page 2 (emphasis mine):
In order to maintain the treadwear warranty on your tires, the tires
must be rotated every 6,000 to 8,000 miles (10,000 -12,000 km), or as
recommended by the vehicle manufacturer, whichever rotation period
For standard tires (i.e. not unidirectional) it is important to get the tires rotating in the opposite direction. For front wheel drive cars you typically move the front tires to the rear (same side) and the rear tires criss-cross to the front. This means that the tires that originally started out on the front will not rotate in the opposite direction until your second tire rotation and if you go by the 10,000 mile recommendation, then they won't start rotating in the opposite direction until 20,000 miles. That seems too long in my opinion.
Edited by Texasota, 22 October 2014 - 04:10 PM.