For those owners that put very few miles on their cars, have you figured out the time between oil change recommendation of the FSS? Wilma (born 12/10/07) had her first oil change on June 23, 2009 (2,600 miles on the odometer) & has had < 3,000 miles put on her since. Or does the FSS let you go the same # of miles as a frequently driven XF? The FSS allows Fred to go >8,000 miles (which is 4 to 5 months driving).