As some people may have noticed, there was a bug with destroyed bases not going abandoned at the right time. This bug was introduced with a patch a while back that made the timer scale with the tech level of the base. Unfortunately for high level bases, the way the timer was loaded caused higher tech bases to actually gain time every time the server restarted.

Anyways the timers are currently:

T6: 4 days
T9: 4.75 days
T12: 5.5 days
T14: 6 days
T16: 6.5 days
T18: 7 days
T20: 7.5 days

Though it isn't set in stone, we plan on reducing them to the following numbers for the next universe reset:

T6: 2.4 days
T9: 2.85 days
T12: 3.3 days
T14: 3.6 days
T16: 3.9 days
T18: 4.2 days
T20: 4.5 days

For the more mathematically inclined, the formula is

((Base Tech Level / 2) + 5) / 10 * Constant number

The current constant is 5 days, we plan to change it to 3 days, for anyone who wants to double check my calculations.