When a sim ages to elder, the remaining lifespan is determined. Plantsims get 15-25 days and other sims get 10-20 days. This is adjusted by current aspiration level:

• Red -2 days
• Green (low) no adjustment
• Green (high) +3 days
• Gold +7 days
• Platinum +10 days

Aspiration at other age transitions have no effect. So the maximum ranges of the elder period are 13-35 days for plantsims and 8-30 days for everyone else.