List of gasoline additives
Petrol additives increase petrol's octane rating or act as corrosion inhibitors or lubricants, thus allowing the use of higher compression ratios for greater efficiency and power. Types of additives include metal deactivators, corrosion inhibitors, oxygenates and antioxidants.
Some additives are harmful and are regulated or banned in some countries.
- Antioxidants, stabilizers
- Detergents; see also Top Tier Detergent Gasoline
- Antiknock agents
- Tetraethyllead (TEL), now banned almost everywhere for causing brain damage.
- Methylcyclopentadienyl manganese tricarbonyl (MMT) is an extremely poisonous neurotoxic substance and is fatal if swallowed/inhaled and will cause a disease similar to Parkinson's called manganism.
- Ferrocene highly toxic
- Dimethyl methylphosphonate
- Lead scavengers (for leaded gasoline)
- Fuel dyes, most common:
- 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
- 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)
- Ferrous picrate is used in Diesel fuel to increase fuel conversion efficiency and reduce emissions.
- Nitromethane can increase the cetane number of diesel fuel, improving its combustion properties
- Nitrous oxide, or simply nitrous, is an oxidizer used in many forms of motorsports such as drag racing and street racing.
Fuel additives in the United States are regulated under section 211 of the Clean Air Act (as amended in January 1995). The Environmental Protection Agency (EPA) requires the registration of all fuel additives which are commercially distributed for use in highway motor vehicles in the United States, and may require testing and ban harmful additives. The EPA also regularly reviews the health and net economic benefits of Clean Air Act policies.
The act also requires deposit control additives (DCAs) be added to all petrol. This type of additive is a detergent additive that acts as a cleansing agent in small passages in the carburetor or fuel injectors. This in turn serves to ensure a consistent air and fuel mixture that will contribute to better gas mileage.
- For additive metering see metering pumps
- Oil additive, which describes some similar additives
- Top Tier Detergent Petrol
- ARRC Auto Repair Reference Center. Point 5 Technologies. Accessed via EbscoHost on November 27, 2009
- EPA: List of Registered Gasoline Additives (Under 40 CFR Part 79)
- "Material Safety Datasheet. Methylcyclopentadienyl Manganese Tricarbonyl" (PDF). datasheets.scbt.com/sc-228587.pdf.
- "PDF]Ferrocene MSDS - ScienceLab". www.sciencelab.com/msds.php?msdsId=9924047.
-  List of American fuel additives and applicable regulatory requirements.
-  Benefits and Costs of the Clean Air Act: a set of scientific reviews conducted by the U.S. Environmental Protection Agency in compliance with the act.