| Relevance | Word | Links |
| 100.00% | gas | Concordance - Matched context |
| 39.14% | breathing | Concordance - Matched context |
| 35.95% | exhaust-driven | Concordance - Matched context |
| 34.78% | nonventilated | |
| 33.72% | magnetohydrodynamic | Concordance - Matched context |
| 32.84% | southwest | |
| 29.23% | continuous-flow | |
| 26.79% | splashed | |
| 26.67% | recirculating | Concordance - Matched context |
| 26.45% | air-atomized | |
| 26.43% | liberated | |
| 25.84% | hot-gas | |
| 25.29% | internal-combustion | Concordance - Matched context |
| 25.04% | acid-treated mineral lubricating | |
| 25.04% | additive-containing | |
| 25.04% | deasphalted | |
| 25.04% | epoxidized | |
| 25.04% | halo-substituted | |
| 25.04% | hydro-refined | |
| 25.04% | hydrofinished | |
| 25.04% | isoparaffin-containing | |
| 25.04% | mineral based | |
| 25.04% | napthanic | |
| 25.04% | over-used | |
| 25.04% | pressure-atomized | |
| 25.04% | re-refined | |
| 25.04% | reclaimed | |
| 25.04% | reprocessed | |
| 25.04% | rerefined | |
| 25.04% | silicon-based | |
| 25.04% | solvent-extracted | |
| 25.04% | solvent-treated | |
| 25.04% | spillable | |
| 25.04% | trimethylsiloxy-terminated | |
| 25.04% | unrefined | |
| 25.04% | vegetable | |
| 24.97% | full-range | |
| 24.51% | aero | |
| 24.51% | air-breathing | |
| 24.51% | air-compressing | |
| 24.51% | alcohol-fueled | |
| 24.51% | auto-ignited | |
| 24.51% | compression-ignited | |
| 24.51% | compression-ignited internal combustion | |
| 24.51% | crank-type | |
| 24.51% | crankshaft-type | |
| 24.51% | cross-scavenged | |
| 24.51% | diesel-operated | |
| 24.51% | diesel-type | |
| 24.51% | direct-injected | |