Gasoline 87

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The number “87” associated with gasoline refers to its octane rating. Octane ratings are used to measure a fuel’s ability to resist “knocking” or “pinging” during combustion, caused by the air-fuel mixture detonating multiple times in more than one place in the cylinder.

Gasoline 87 Characteristics

  • Knock Resistance: Lower compared to higher octane fuels. Adequate for most standard engines.
  • Price: Generally the cheapest option at the pump.
  • Energy Content: Similar to mid-grade and premium gasolines. Octane rating does not directly relate to energy content.
  • Use Case: Suitable for most vehicles that do not have high compression ratios or turbochargers.
  • Fuel Economy: Typically, no noticeable difference compared to higher octane fuel when used in vehicles designed for 87 octane.
  • Additives: May contain fewer cleaning additives than some premium fuels, although many brands now include sufficient cleaning agents in all grades.

The Ideal Choice

Suitable for most cars and light-duty trucks. Manufacturers design most vehicles to run perfectly well on Regular 87-octane gasoline.

Points of Interest

  • Cost-Effectiveness
  • Wide Availability
  • Fuel Economy
  • Versatility
  • Knock Resistance
  • Environmental Impact
  • Additives
  • Manufacturer Recommendations
  • Compatibility
  • Performance

Gasoline 87 Properties

Octane Rating Octane Rating:

  • 87 octane, suitable for most standard vehicle engines.

Chemical Composition Hydrocarbons:

  • Primarily composed of hydrocarbons, often in a mix that can include iso-octane, heptane, and various alkanes, cycloalkanes, and aromatic hydrocarbons.
  • Additives: May include detergents to clean the engine and other components, corrosion inhibitors, and sometimes ethanol (usually up to 10%).

Combustion Properties

  • Knock Resistance: Sufficient for most standard compression engines.
  • Energy Content: Approximately 114,000 British Thermal Units (BTU) per gallon, although this can vary. The octane rating does not affect the energy content.

Physical Properties

  • Color: Generally clear, although it can have a slight hue depending on any additives.
  • Odor: Characteristic “gasoline” smell, which is actually from additives including benzene and toluene to make leaks detectable.
  • Volatility: Engineered for specific vapor pressures to ensure good engine starting in various weather conditions.
  • Density: Approximately 6 to 6.3 pounds per gallon, although this can vary based on temperature and altitude.

Environmental Aspects

  • Carbon Emissions: Combustion produces carbon dioxide (CO2), water (H2O), and may also produce trace amounts of carbon monoxide (CO), nitrogen oxides (NOx), and other emissions.
  • Renewable Content: Some may contain ethanol as a renewable component, usually up to 10% by volume.

Storage and Stability

  • Shelf-life: Generally stable for up to three months under proper storage conditions.
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