Most countries visited on a single tank of fuel (diesel or petrol)
Who
Audi UK, RAC
What
14 countries total number
Where
Netherlands (Maastricht)
When

The most countries visited on a single tank of fuel is 14 and was achieved by RAC and Audi UK (both UK) on 9-10 June 2015.

Drivers Andrew Frankel and Rebecca Jackson (both UK) first started their journey in The Netherlands, moving on to Belgium, Luxembourg, France, Switzerland, Liechtenstein, Austria, Germany, Italy, Slovenia, Croatia then Bosnia and Herzegovina, Serbia and, finally, Hungary. The journey took them a total of 28 hours to complete.