We are couple from California and travelled through South America last year (Chile, Argentina, Bolivia and Peru).
We purchased a car in January 2015 in Santiago, Chile (Its a 2004 Subaru Outback). After travelling through the countries listed above we finally reached Lima,Peru in April. Due to personal reasons we had to cut short our trip in Lima and head back to California.
Our original car posting (http://www.drivetheamericas.com/forums/awd-2005-subaru-outback-peru)