user: Question: When was power (hp) less than 93 for the OM324 engine used?
Columns: ['Engine', 'Capacity (l)', 'Power (hp)', 'Torque', 'Used']
Types: ['text', 'real', 'real', 'text', 'text']
Sample row: ['B', 3.0, 85.0, 'lb·ft (N·m)', '1974–1979']
SQL:

assistant: SELECT "Used" FROM "Table" WHERE "Power (hp)" < 93.0 AND "Engine" = 'OM324';