Fuel Additives - Additives

Additives

• Oxygenates
  • Alcohols:
    • Methanol (MeOH)
    • Ethanol (EtOH)
    • Isopropyl alcohol (IPA)
    • n-butanol (BuOH)
    • Gasoline grade t-butanol (GTBA)
  • Ethers:
    • Methyl tert-butyl ether (MTBE) Now outlawed in many states for road use.
    • Tertiary amyl methyl ether (TAME)
    • Tertiary hexyl methyl ether (THEME)
    • Ethyl tertiary butyl ether (ETBE)
    • Tertiary amyl ethyl ether (TAEE)
    • Diisopropyl ether (DIPE)

• Antioxidants, stabilizers
  • Butylated hydroxytoluene (BHT)
  • 2,4-Dimethyl-6-tert-butylphenol
  • 2,6-Di-tert-butylphenol (2,6-DTBP)
  • p-Phenylenediamine
  • Ethylene diamine

• Antiknock agents
  • Tetraethyllead
  • Methylcyclopentadienyl manganese tricarbonyl (MMT)
  • Ferrocene
  • Iron pentacarbonyl
  • Toluene
  • Isooctane
  • Triptane

• Lead scavengers (for leaded gasoline)
  • Tricresyl phosphate (TCP) (also an AW additive and EP additive)
  • 1,2-Dibromoethane
  • 1,2-Dichloroethane

• Fuel dyes, most common:
  • Solvent Red 24
  • Solvent Red 26
  • Solvent Yellow 124
  • Solvent Blue 35

• Fuel additives in general
  • Ether and other flammable hydrocarbons have been used extensively as starting fluid for many difficult-to-start engines, especially diesel engines
  • Nitrous oxide, or simply nitrous, is an oxidizer used in auto racing
  • Nitromethane, or "nitro," is a high-performance racing fuel
  • Acetone is a vaporization additive, mainly used with methanol racing fuel to improve vaporisation at start up
  • Butyl rubber (as polyisobutylene succinimide, detergent to prevent fouling of diesel fuel injectors)
  • Picrate improves combustion, increases fuel mileage
  • Silicone is an anti-foaming agent for diesel fuel, but may damage oxygen sensors in gasoline engines
  • Tetranitromethane can increase the cetane number of diesel fuel, improving its combustion properties