24hr B-Spec races.
Several days.
Original launch EU 60Gb, several weeks running back to back 24hr races in A and B Spec.
2nd Gen. 60GB fatty. Never more than a few hours, was afraid I'd kill it. This past weekend after roughly 4 years of use, it stopped reading Blu-Ray discs. Upgrading to a Slim this week.
Several weeks, going into months. 60GB launch that I still have, still runs. The thing is a tank.