Manufacturer-documented fuel consumption for 30 500–505 kW Diesel generator sets — median 32.77 gal/h at full load, 16.91 gal/h at half load.
Compare 500–505 kW Diesel generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Caterpillar C15 ATAAC | 500 | 20.61 | 36.09 | 65 | 0.8 |
| Caterpillar C15 GC | 500 | 18.84 | 36.19 | 3671 | 51.5 |
| Caterpillar C18 Diesel Oilfield Generator Set | 500 | 21.58 | 36.72 | — | — |
| Caterpillar D500 GC | 500 | 24.22 | 42.56 | 3671 | 40.0 |
| Caterpillar X Q 500 RENTAL | 500 | — | 33.29 | 2650 | — |
| Caterpillar XQ 500 | 500 | — | 36.30 | 2445 | — |
| Caterpillar XQ570 | 500 | — | 33.29 | 2650 | — |
| Cummins/Onan 500 DFEK | 500 | 17.70 | 30.38 | — | — |
| Cummins/Onan 500 DFX-57R | 500 | — | 10.57 | — | — |
| Cummins/Onan DFE | 500 | 14.79 | 10.30 | 3218 | 57.5 |
| Cummins/Onan DFEK | 500 | — | 30.38 | — | — |
| Cummins/Onan QSX15 | 500 | — | 28.27 | — | — |
| FG Wilson P625E1 | 500 | — | 30.56 | 863 | — |
| Generac MD 500 | 500 | 5.15 | 8.24 | 84 | 4.3 |
| Generac SD500 | 500 | 5.15 | 8.24 | 84 | 4.3 |
| Hipower HMW 510 T6U | 500 | 15.24 | 27.09 | 740 | 12.8 |
| Katolight D500FGV4 | 500 | 16.91 | 33.81 | — | — |
| Katolight D500FJV4 | 500 | 16.91 | 33.81 | — | — |
| Katolight D500FNV4 | 500 | 16.91 | 33.81 | — | — |
| Katolight D500FPV4 | 500 | 16.91 | 33.81 | — | — |
| Katolight D500FRV4 | 500 | 16.91 | 33.81 | — | — |
| Kohler 500EOZCS | 500 | 18.39 | 34.90 | — | — |
| MQ Power 500kW Containerized Diesel Generator Set | 500 | — | 37.70 | 600 | — |
| MQ Power CG500C2 | 500 | 17.25 | 31.12 | 3028 | 46.4 |
| MTU 10V1600 DS500 | 500 | 1.37 | 2.62 | 740 | 142.3 |
| MTU 6R0269 DS500 | 500 | 18.07 | 36.59 | — | — |
| SDMO GS500UC | 500 | — | 32.26 | 215 | — |
| SDMO V550UC | 500 | — | 3.96 | — | — |
| Winco DR500F4 | 500 | 10.25 | 16.98 | — | — |
| Cummins/Onan KTA19-G4 | 504 | — | 28.27 | — | — |
Figures from each model’s own manufacturer documentation (spec sheets and manuals); runtime = documented tank capacity ÷ consumption at 50% load. Verify against the datasheet for your exact configuration.
Across 30 models with manufacturer data, full-load consumption runs 2.62–42.56 gal/h (median 32.77); at 50% load the median is 16.91 gal/h.
At 50% load, documented tank sizes give 0.8–142.3 hours (median 40.0 h) across 9 models.