Editing Gasoline (section)

====<span class="anchor" id="Lead Replacement Petrol"></span> Lead replacement petrol====
Lead replacement petrol (LRP) was developed for vehicles designed to run on leaded fuels and incompatible with unleaded fuels. Rather than tetraethyllead, it contains other metals such as [[potassium]] compounds or [[methylcyclopentadienyl manganese tricarbonyl]] (MMT); these are purported to buffer soft exhaust valves and seats so that they do not suffer recession due to the use of unleaded fuel.

LRP was marketed during and after the phaseout of leaded motor fuels in the United Kingdom, [[Australia]], [[South Africa]], and some other countries.{{vague|date=August 2016}} Consumer confusion led to a widespread mistaken preference for LRP rather than unleaded,<ref>{{cite news |last=Seggie |first=Eleanor |date=5 August 2011 |title=More than 20% of SA cars still using lead-replacement petrol but only 1% need it |work=[[Engineering News (Creamer Media)|Engineering News]] |location=South Africa |url=http://www.engineeringnews.co.za/article/cleaner-fuels-for-sa-2011-08-05 |url-status=dead |access-date=30 March 2017 |archive-url=https://web.archive.org/web/20161013195145/http://www.engineeringnews.co.za/article/cleaner-fuels-for-sa-2011-08-05 |archive-date=13 October 2016 |df=dmy-all}}</ref> and LRP was phased out 8 to 10 years after the introduction of unleaded.<ref>{{cite news |last1=Clark |first1=Andrew |date=14 August 2002 |title=Petrol for older cars about to disappear |work=[[The Guardian]] |location=London |url=https://www.theguardian.com/uk/2002/aug/15/oil.business |url-status=live |access-date=30 March 2017 |archive-url=https://web.archive.org/web/20161229112618/https://www.theguardian.com/uk/2002/aug/15/oil.business |archive-date=29 December 2016 |df=dmy-all}}</ref>

Leaded gasoline was withdrawn from sale in Britain after 31 December 1999, seven years after [[European Economic Community|EEC]] regulations signaled the end of production for cars using leaded gasoline in member states. At this stage, a large percentage of cars from the 1980s and early 1990s which ran on leaded gasoline were still in use, along with cars that could run on unleaded fuel. However, the declining number of such cars on British roads saw many gasoline stations withdrawing LRP from sale by 2003.<ref>{{Cite news |date=15 August 2002 |title=AA warns over lead replacement fuel |work=[[The Daily Telegraph]] |location=London |url=https://www.telegraph.co.uk/motoring/news/2717637/AA-warns-over-lead-replacement-fuel.html |url-status=live |access-date=30 March 2017 |archive-url=https://web.archive.org/web/20170421115246/http://www.telegraph.co.uk/motoring/news/2717637/AA-warns-over-lead-replacement-fuel.html |archive-date=21 April 2017 |df=dmy-all}}</ref>