Editing Gasoline (section)

===Dyes===
{{Main|Fuel dyes}}

Though gasoline is a naturally colorless liquid, many gasolines are dyed in various colors to indicate their composition and acceptable uses. In Australia, the lowest grade of gasoline (RON 91) was dyed a light shade of red/orange, but is now the same color as the medium grade (RON 95) and high octane (RON 98), which are dyed yellow.<ref>{{cite web |title=The Color of Australian Unleaded Petrol Is Changing To Red/Orange |url=http://www.aip.com.au/topics/mr_pdf/AIP_media_release_280912.pdf |url-status=dead |archive-url=https://web.archive.org/web/20130409211243/http://www.aip.com.au/topics/mr_pdf/AIP_media_release_280912.pdf |archive-date=9 April 2013 |access-date=2012-11-22 |df=dmy-all }}</ref> In the U.S., aviation gasoline ([[avgas]]) is dyed to identify its octane rating and to distinguish it from kerosene-based jet fuel, which is left colorless.<ref>{{cite web |date=17 May 2008 |title=EAA – Avgas Grades |url=http://www.eaa.org/autofuel/avgas/grades.asp |url-status=dead |archive-url=https://web.archive.org/web/20080517022056/http://www.eaa.org/autofuel/avgas/grades.asp |archive-date=17 May 2008 |access-date=6 October 2012 }}</ref> In Canada, the gasoline for marine and farm use is dyed red and is not subject to fuel excise tax in most provinces.<ref>{{cite web |title=Fuel Taxes & Road Expenditures: Making the Link |url=https://umanitoba.ca/faculties/management/ti/media/docs/Fuel_Taxes_Road_Expenditures_1999.pdf |url-status=live |archive-url=https://web.archive.org/web/20140410200621/http://umanitoba.ca/faculties/management/ti/media/docs/Fuel_Taxes_Road_Expenditures_1999.pdf |archive-date=10 April 2014 |access-date=26 September 2017 |page=2 |df=dmy-all}}</ref>