Let's write down our mileage at the beginning of 2015. Make a guess how many miles you will drive this year, and compare with the real number when 2015 is over.
2006 e90 : 90,114 miles. Guess : 7,000 miles.
2005 Mini : 138,405 miles. Guess : 1,000 miles.
2008 Saab : 68,487 miles. Guess : 12,000 miles.
The Mini may be sold this year. My wife and I carpool now, can't justify a 3rd car in the garage.