Residual Fuel

{
  "id": "MLC-T-ENV-024034",
  "term": "Residual Fuel",
  "field": "Environment",
  "definition": "1. A petroleum fuel with a T90 temperature at or above 700 °F. For example, No. 5 fuels and No. 6 fuels are residual fuels. Residual fuel grades are specified in ASTM D396 and ISO 8217. T90 temperature is based on the distillation test method specified in § 1090.1350.\n\n2. Petroleum product containing the heavier compounds that remain after the distillate fuel oils (e.g., diesel fuel and marine distillate fuel) and lighter hydrocarbons are distilled away in refinery operations.\n\n3. Any fuel with a T90 greater than 700 °F as measured with the distillation test method specified in 40 CFR 1065.1010. This generally includes all RM grades of marine fuel without regard to whether they are known commercially as residual fuel. For example, fuel marketed as intermediate fuel may be residual fuel.\n\n4. Petroleum fuel that can only be used in diesel engines if it is preheated before injection. For example, No. 5 fuels, No. 6 fuels, and RM grade marine fuels are residual fuels. Note: Residual fuels do not necessarily require heating for storage or pumping. [40 CFR 80.2 (CFR 2013)]",
  "references": [
    "40 CFR 1090.80 (CFR 2021)",
    "40 CFR 94.2 (CFR 2013)",
    "40 CFR 1042.901 (CFR 2013)",
    "40 CFR 80.2 (CFR 2024)"
  ],
  "url": "https://mlchart.com/terminology/environment/residual-fuel/"
}