How much oil capacity is typical for a 1500 kVA transformer?

Oil capacity for a 1500 kVA transformer varies widely with voltage class, cooling design, and manufacturer. A compact 1500 kVA distribution transformer at moderate voltage can have a much lower oil volume than a higher voltage unit with larger radiators and higher insulation clearances. As a rough planning concept, oil volume is typically in the hundreds to low thousands of liters, but the only reliable number is the OEM drawing or nameplate data for that exact configuration and cooling class.