Editing Gallon (section)

==Worldwide usage==
[[File:Gasoline unit.svg|thumb|[[Petrol]] units used in the world:
{{legend|#ff0000|[[Litre]]}}{{legend|#00ff00|US gallon}}{{legend|#0000ff|Imperial gallon}}{{legend|#e0e0e0|No data}}]]

===Imperial gallon===
As of 2021, the imperial gallon continues to be used as the standard petrol unit on 10 [[List of Caribbean islands|Caribbean island groups]], consisting of:

* four [[British Overseas Territories]] ([[Anguilla]],<ref>{{cite web|date=19 October 2012|title=Anguilla Renewable Energy Integration Project Final Report|url=http://cdkn.org/wp-content/uploads/2012/08/Anguilla-RE-Integration-Final-Report-121019.pdf |archive-url=https://web.archive.org/web/20131014175039/http://cdkn.org/wp-content/uploads/2012/08/Anguilla-RE-Integration-Final-Report-121019.pdf |archive-date=2013-10-14 |url-status=live|access-date=13 October 2013|work=Anguilla RE Integration Final Report|publisher=Government of Anguilla Ministry of Infrastructure, Communications, Utilities, and Housing (MICUH)|page=104|quote=In 2008—the most recent year where WTI crude oil averaged US$100 per barrel—ANGLEC paid an average of about US$4 per imperial gallon (imp gal) for diesel.}}</ref> the [[British Virgin Islands]],<ref>{{cite web|last=Walker|first=William|date=5 September 2012|title=Biwater project draws scrutiny|url=http://www.bvibeacon.com/2/index.php?option=com_content&view=article&id=2487:biwater-project-draws-scrutiny&catid=491:commentary-sept-6-2012|archive-url=https://web.archive.org/web/20131002140602/http://www.bvibeacon.com/2/index.php?option=com_content&view=article&id=2487:biwater-project-draws-scrutiny&catid=491:commentary-sept-6-2012|archive-date=2013-10-02|access-date=2013-09-30}}</ref><ref>{{Cite web |title=Statement By Premier Fahie In One-On-One Press Conference – Update On Current Matters {{!}} Government of the Virgin Islands |url=https://bvi.gov.vg/media-centre/statement-premier-fahie-one-one-one-press-conference-update-current-matters |access-date=2022-12-16 |website=bvi.gov.vg}}</ref> the [[Cayman Islands]],<ref>{{cite news|last=Wilson|first=Stuart|date=9 May 2013|title=Fuel costs driven by factors|work=Cayman Compass|url=http://www.compasscayman.com/caycompass/2013/05/09/Fuel-costs-driven-by-factors/|access-date=30 September 2013|archive-date=22 December 2015|archive-url=https://web.archive.org/web/20151222131450/http://www.compasscayman.com/caycompass/2013/05/09/Fuel-costs-driven-by-factors/|url-status=dead}}</ref> and [[Montserrat]])<ref>{{cite news|date=30 November 2012|title=Petrol price increases, diesel decreases, cost of living goes up|work=The Montserrat Reporter|url=http://www.themontserratreporter.com/gasoline-price-increases-diesel-decreases-cost-of-living-goes-up/|access-date=30 September 2013|archive-date=3 October 2022|archive-url=https://web.archive.org/web/20221003154555/http://www.themontserratreporter.com/gasoline-price-increases-diesel-decreases-cost-of-living-goes-up/|url-status=dead}}</ref><ref>{{cite news|author=Htin Lynn Aung|date=22 September 2017|title=Fuel prices on the rise|work=[[The Myanmar Times]]|url=https://www.mmtimes.com/news/fuel-prices-rise.html|access-date=18 January 2018|archive-date=18 January 2018|archive-url=https://web.archive.org/web/20180118064732/https://www.mmtimes.com/news/fuel-prices-rise.html|url-status=dead}}</ref> and 
* six countries ([[Antigua and Barbuda]],<ref name=":0">{{Cite web|title=Government of Antigua and Barbuda|url=https://ab.gov.ag/media_page.php?page=17|access-date=2021-05-05|website=ab.gov.ag}}</ref> [[Dominica]],<ref>{{cite web|date=10 May 2011|title=Photo of the day: Up and up it goes|url=http://dominicanewsonline.com/news/homepage/features/photo-of-the-day/photo-of-the-day-up-and-up-it-goes/|work=Dominica News Online|access-date=30 September 2013|archive-date=21 February 2018|archive-url=https://web.archive.org/web/20180221103436/http://dominicanewsonline.com/news/homepage/features/photo-of-the-day/photo-of-the-day-up-and-up-it-goes/|url-status=dead}}</ref> [[Grenada]],<ref>{{cite book|url=https://books.google.com/books?id=p1g4z5GpiBoC&pg=PA17|title=Grenada: Third Review Under the Three-Year Arrangement Under the Poverty Reduction and Growth Facility, Requests for Modification of Quantitative Performance Criterion and Augmentation, and Financing Assurances Review|publisher=[[International Monetary Fund]]|year=2009|page=17|access-date=13 October 2013}}</ref><ref>{{Cite web|date=2020-05-20|title=Authorities in Dominica reduce fuel prices|url=https://antiguaobserver.com/authorities-in-dominica-reduce-fuel-prices/|access-date=2021-05-05|website=Antigua Observer Newspaper|language=en-CA}}</ref> [[Saint Christopher and Nevis]],<ref>{{cite web|last=Thomas|first=Steve|date=5 September 2008|title=Gas prices capped under $18 – lowest since July|url=http://www.thestkittsnevisobserver.com/2008/09/05/news21.html|url-status=dead|archive-url=https://web.archive.org/web/20120524184004/http://thestkittsnevisobserver.com/2008/09/05/news21.html|archive-date=24 May 2012|work=[[The St. Kitts-Nevis Observer]]|df=dmy}}</ref> [[Saint Lucia]],<ref>{{cite web|title=Rotary has a new President – St. Lucia Voice News|url=http://www.thevoiceslu.com/local_news/2013/july/09_07_13/Rotary.htm|url-status=dead|archive-url=https://web.archive.org/web/20151222145630/http://www.thevoiceslu.com/local_news/2013/july/09_07_13/Rotary.htm|archive-date=22 December 2015|df=dmy}}</ref> and [[Saint Vincent and the Grenadines]]<ref>{{cite web|title=Another service station sues SOL over fuel volume discrepancy|url=http://www.iwnsvg.com/2012/04/26/another-service-station-sues-sol-over-fuel-volume-discrepancy/|work=iWitness News|date=26 April 2012 }}</ref>).

All 12 of the Caribbean islands use [[miles per hour]] for speed limits signage, and [[Left- and right-hand traffic|drive on the left side of the road]].

The United Arab Emirates ceased selling petrol by the imperial gallon in 2010 and switched to the litre, with Guyana following suit in 2013.<ref>{{Cite web|title=Petrol stations in UAE go the metric route|url=https://gulfnews.com/business/energy/petrol-stations-in-uae-go-the-metric-route-1.559595|access-date=2021-05-05|website=gulfnews.com|language=en}}</ref><ref>{{Cite web|date=2009-12-15|title=End of road for imperial gallon as UAE switches to buying fuel by litre|url=https://www.thenationalnews.com/uae/end-of-road-for-imperial-gallon-as-uae-switches-to-buying-fuel-by-litre-1.548176|access-date=2021-05-05|website=The National|language=en}}</ref><ref>{{Cite web|date=2013-06-28|title=Gas prices at Guyoil stations remain below $1,000 mark {{!}} Caribbean Mi…|url=http://www.caribmillers.com/content/gas-prices-guyoil-stations-remain-below-1000-mark|access-date=2021-05-05|website=Archive.is|archive-date=28 June 2013|archive-url=https://archive.today/20130628202944/http://www.caribmillers.com/content/gas-prices-guyoil-stations-remain-below-1000-mark|url-status=dead}}</ref> In 2014, [[Myanmar]] switched from the imperial gallon to the litre.<ref>{{Cite web|url=http://www.oilseedcrops.org/2014/04/05/petrol-prices-march-2014-in-yangon-myanmar/|title=Petrol Prices March 2014 in Yangon, Myanmar|website=Oilseedcrops.org|date=5 April 2014}}</ref>

Antigua and Barbuda has proposed switching to selling petrol by litres since 2015.<ref>{{cite web|year=2013|title=The Re-Launch of Antigua And Barbuda's Metrication Programme|url=http://www.cbji.com/makingnews.aspx?id=692|url-status=dead|archive-url=https://web.archive.org/web/20120116182201/http://www.cbji.com/makingnews.aspx?id=692|archive-date=16 January 2012|access-date=20 May 2013|publisher=Diversity Global Magazine}}</ref><ref name=":0"/>

In the [[European Union]] the gallon was removed from the list of legally defined primary units of measure catalogue in the [[European units of measurement directives|EU directive 80/181/EEC]] for trading and official purposes, effective from 31 December 1994. Under the directive the gallon could still be used, but only as a supplementary or secondary unit.<ref>{{cite web|author=The Council of the European Communities|date=9 February 2000|title=Council Directive 80/181/EEC of 20 December 1979 on the approximation of the laws of the Member States relating to Unit of measurement and on the repeal of Directive 71/354/EEC|url=http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CONSLEG:1980L0181:20000209:EN:PDF|access-date=7 February 2009|quote=The legal units of measurement ... for economic, public health, public safety or administrative purposes ... litre}}</ref>  

As a result of the EU directive Ireland and the United Kingdom passed legislation to replace the gallon with the litre as a primary unit of measure in trade and in the conduct of public business, effective from 31 December 1993, and 30 September 1995 respectively.<ref>{{cite web|date=13 July 1995|title=The Units of Measurement Regulations 1995 (Article 4)|url=http://www.opsi.gov.uk/si/si1995/Uksi_19951804_en_1.htm|access-date=1 December 2011}}</ref><ref>{{cite web|year=1995|title=Units of Measurement Directive|url=http://www.lacors.gov.uk/lacors/ContentDetails.aspx?id=2515|url-status=dead|archive-url=https://web.archive.org/web/20120424231200/http://www.lacors.gov.uk/lacors/ContentDetails.aspx?id=2515|archive-date=24 April 2012|access-date=26 November 2011|publisher=[[LACORS]]|df=dmy}}</ref><ref>{{cite web|year=1995|title=Guidance Note on the use of Metric Units of Measurement by the Public Sector|url=http://www.nmo.bis.gov.uk/Docs/Legislation/Units%20of%20Measurement/Gnotes%20for%20public%20sector%20on%20use%20of%20metric.pdf|url-status=dead|archive-url=http://webarchive.nationalarchives.gov.uk/20110207120946/http://www.nmo.bis.gov.uk/Docs/Legislation/Units%20of%20Measurement/Gnotes%20for%20public%20sector%20on%20use%20of%20metric.pdf|archive-date=7 February 2011|access-date=20 March 2017|publisher=[[Department of Trade and Industry (United Kingdom)|Department of Trade and Industry]]|df=dmy}}</ref><ref>{{cite web|date=9 September 1992|title=S.I. No. 255/1992 — European Communities (Units of Measurement) Regulations, 1992.|url=http://www.irishstatutebook.ie/1992/en/si/0255.html|access-date=1 December 2011|work=Irish Statute Book|publisher=Office of the Attorney General}}</ref> Though the gallon has ceased to be a primary unit of trade, it can still be legally used in both the UK and Ireland as a supplementary unit. However, barrels and large containers of beer, oil and other fluids are commonly measured in multiples of an imperial gallon. 

Miles per imperial gallon is used as the primary fuel economy unit in the United Kingdom and as a supplementary unit in Canada on official documentation.<ref>{{cite web|date=5 November 2008|title=FAQs – Fuel Consumption Program|url=http://www.tc.gc.ca/eng/programs/environment-fcp-faq-139.htm|url-status=live|archive-url=https://web.archive.org/web/20100520103922/http://www.tc.gc.ca/eng/programs/environment-fcp-faq-139.htm|archive-date=20 May 2010|access-date=31 July 2018|publisher=Transport Canada|df=dmy-all}}</ref><ref>{{cite book|url=http://www.legislation.gov.uk/uksi/2001/3523/pdfs/uksi_20013523_en.pdf |archive-url=https://web.archive.org/web/20101218054954/http://www.legislation.gov.uk/uksi/2001/3523/pdfs/uksi_20013523_en.pdf |archive-date=2010-12-18 |url-status=live|title=Statutory Instrument 2001/3523 Environmental Protection – The Passenger Car (Fuel Consumption and CO<sub>2</sub> Emissions Information) Regulations 2001|date=30 October 2001|publisher=The Stationery Office|isbn=0-11-038743-0|access-date=1 December 2011}}</ref><ref>{{Cite web|last=Canada|first=Natural Resources|date=2018-04-30|title=energuide-vehicles|url=https://www.nrcan.gc.ca/energy-efficiency/energuide-canada/energuide-vehicles/21010|access-date=2021-02-21|website=Nrcan.gc.ca}}</ref>

===US gallon===
Other than the United States, [[petrol]] is sold by the US gallon in seven other countries and four US territories:
* the Caribbean country of [[Haiti]],
* the Central American countries of [[Belize]] and [[Guatemala]],
* the Pacific Ocean countries of [[Marshall Islands]], [[Federated States of Micronesia]], and [[Palau]], which are [[Associated state|associated]] countries of the United States,
* the African country of [[Liberia]], a former [[protectorate]] of the United States,<ref>{{Cite web |date=June 10, 2020 |title=Liberia: Senate Imposes US$0.30 Tax on Each Gallon of Petroleum Product. |url=https://frontpageafricaonline.com/news/liberia-senate-imposes-us0-30-tax-on-each-gallon-of-petroleum-product-approves-fy2019-2020-recast-budget-at-us518m/}}</ref> and
* the US territories of [[American Samoa]],<ref>{{cite web|url=http://www.samoanews.com/?q=node/76479 |title=Gasoline goes up eleven cents per gallon tomorrow |work=Samoa News |url-status=dead |archive-url=https://web.archive.org/web/20160304201034/http://www.samoanews.com/?q=node%2F76479 |archive-date=4 March 2016 }}</ref> the [[Northern Mariana Islands]],<ref>{{cite web|url=http://www.saipantribune.com/newsstory.aspx?newsID%3D57572%26cat%3D1 |title=Shell pump prices up 8 cents |work=Saipan Tribune |first=Liberty |last=Dones |date= 17 May 2006 |access-date=30 September 2013 |url-status=dead |archive-url=https://web.archive.org/web/20061030231121/http://www.saipantribune.com/newsstory.aspx?newsID=57572&cat=1 |archive-date=30 October 2006 |df=dmy-all }}</ref> [[Guam]],<ref>{{cite web|url=http://www.guampdn.com/article/20130808/NEWS01/130808005/UPDATE-Gas-prices-down-10-cents-4-73-gallon-unleaded |archive-url=https://archive.today/20130930053836/http://www.guampdn.com/article/20130808/NEWS01/130808005/UPDATE-Gas-prices-down-10-cents-4-73-gallon-unleaded |url-status=dead |archive-date=2013-09-30 |title=UPDATE: Gas prices down 10 cents to $4.73 for a gallon of unleaded |work=Pacific Daily News }}</ref> and the [[United States Virgin Islands|US Virgin Islands]].<ref>{{cite news|url=http://virginislandsdailynews.com/news/7-cent-per-gallon-wapa-tax-goes-into-effect-1.1344082 |archive-url=https://archive.today/20130930053844/http://virginislandsdailynews.com/news/7-cent-per-gallon-wapa-tax-goes-into-effect-1.1344082 |url-status=dead |archive-date=30 September 2013 |title=7-cent-per-gallon WAPA tax goes into effect |first=Joy |last=Blackburn |date=16 July 2012 |newspaper=Virgin Islands Daily News |df=dmy }}</ref> [[Puerto Rico]] ceased selling petrol by the US gallon in 1980.<ref>{{citation|last1=Pesquera de Busquets|first1=Carmen T|last2=Barcelo|first2=Carlos Romero|date=14 June 1979|title=Order to establish the price of half 1/2 galon [sic] of gasoline as transitory measure and that the litter [sic] should be the final metric measurement for the sale of gasoline in Puerto Rico|url=http://app.estado.gobierno.pr/ReglamentosOnLine/Reglamentos/2516ING.pdf |archive-url=https://web.archive.org/web/20131114144310/http://app.estado.gobierno.pr/ReglamentosOnLine/Reglamentos/2516ING.pdf |archive-date=2013-11-14 |url-status=live|journal=|location=San Juan, Puerto Rico|publisher=Departamento de Asuntos del Consumidor|access-date=21 May 2013}}</ref>

The latest country to cease using the US gallon is [[El Salvador]] in June 2021.<ref>{{Cite web|date=2020-12-16|title=La gasolina se venderá en litros y otros productos se pesarán en kilogramos, según nuevo sistema métrico a implementarse en 2021 {{!}} Noticias de El Salvador|url=https://www.elsalvador.com/noticias/negocios/gasolina-se-vendera-en-litros-2021/786601/2020/|access-date=2021-05-05|website=Noticias de El Salvador - elsalvador.com|language=es}}</ref>

===Both imperial and US gallon===
Both the imperial gallon and the US gallon are used in the [[Turks and Caicos Islands]], due to an increase in tax duties which was disguised by levying the same duty on the US gallon (3.79 L) as was previously levied on the Imperial gallon (4.55 L), <ref>{{cite web|url=http://www.thebahamasweekly.com/publish/TCI/New_Measures_To_Improve_Tci_Finances_And_Prioritise_Spending_printer.shtml|website=TheBahamasWeekly.com|title=New Measures to Improve TCI Finances And Prioritise Spending}}</ref> and [[the Bahamas]].<ref>{{cite web|url=http://laws.bahamas.gov.bs/cms/images/LEGISLATION/SUBORDINATE/2014/2014-0005/ProtectionofRevenueImpostsVariationAmendmentOrder2014_1.pdf |archive-url=https://web.archive.org/web/20210602214208/http://laws.bahamas.gov.bs/cms/images/LEGISLATION/SUBORDINATE/2014/2014-0005/ProtectionofRevenueImpostsVariationAmendmentOrder2014_1.pdf |archive-date=2021-06-02 |url-status=live|title=OFFICIAL GAZETTE THE BAHAMAS PUBLISHED BY AUTHORITY : NASSAU |date=12 February 2014 |website=Laws.bahamas.gov.bs|access-date=29 January 2022}}</ref><ref>{{cite web |title=Weights and Measures |work=Statute Law of the Bahamas |url=https://www.bbsq.bs/en/files/acts-and-regulations/1-weights-and-measures-act/file |access-date=1 June 2021 |url-status=dead |archive-url=https://web.archive.org/web/20210602215910/https://www.bbsq.bs/en/files/acts-and-regulations/1-weights-and-measures-act/file |archive-date=2 June 2021}}</ref>

===Legacy===
In some parts of the Middle East, such as the [[United Arab Emirates]] and [[Bahrain]], 18.9-litre water cooler bottles are marketed as five-gallon bottles.<ref>{{Cite web |title=AL MANHAL DRINKING WATER 5 GALLON ( 18.9 LITERS ) BOTTLE |url=https://www.buyonline.nestlewaters.bh/al-manhal-drinking-water#}}</ref>