Additional testing may be required to further evaluate fuel quality:
| Test Required | Method | Indicates |
| Distillation | ASTM D86 | Hydrocarbon Mixture |
| API Gravity | ASTM D1298 | Measured Volumes |
| Copper Strip corrosion | ASTM D130 | Protect metal parts |
| Asphaltenes | AH-24A-ASP2 | Filter Plugging |
| Sulfur | ASTM D5453 | Emissions Control |
| Cetane Number | ASTM D976 | Ignition Quality |
| Cetane Index | ASTM D4737 | Aromatic Content |
| Ash Content | ASTM D482 | Engine deposits |
| Viscosity | ASTM D445 | Injector & Pump wear |
| Carbon Residue | ASTM D524 | System Deposits |
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