The Caterpillar 3306 ATAAC is a 10.4 L 6-cylinder turbocharged-air-to-air-aftercooled engine. It powers generator sets from Caterpillar, including the PRIME 225 ekW and STANDBY 250 ekW. It holds 39 L (10.3 gal) of oil and 55 L (14.5 gal) of coolant.
| Oil capacity | 39.0 L |
|---|---|
| Coolant capacity | 55.0 L |
| Displacement | 10.4 L |
| Cylinders | 6 |
| Aspiration | Turbocharged-Air-to-Air-Aftercooled |