| more fuel | 13 | other |
| very | 7 | degree |
| over time | 4 | temporal |
| diesel → be → efficient | 28 |
| diesel → be → most efficient | 3 |
| diesel → be → efficient fuel | 3 |
| negative | neutral | positive |
| 0.065 | 0.307 | 0.629 |
| Raw frequency | 34 |
| Normalized frequency | 0.652 |
| Modifier score | 0.500 |
| Perplexity | 172.791 |