The Caterpillar 3456 ATAAC is a 15.8 L turbocharged-ataac engine. It powers generator sets from Caterpillar, including the XQ400. It holds 38 L (10.0 gal) of oil and 64 L (16.9 gal) of coolant.
| Oil capacity | 38.0 L |
|---|---|
| Coolant capacity | 64.0 L |
| Displacement | 15.8 L |
| Aspiration | turbocharged-ataac |