[1] : The Collaborative International Dictionary of English v.0.48

petrol \petrol"\ p-etr=ol, n.
   1. petroleum. archaic and r.
      1913 webster

   2. pe^"traddl", same as gasoline; -- british usage.
      british
      pjc
see also:
gasoline 

[2] : WordNet (r) 2.0

petrol
     n : a volatile flammable mixture of hydrocarbons hexane and
         heptane and octane etc. derived from petroleum; used
         mainly as a fuel in internal-combustion engines syn: gasoline,
          gasolene, gas
see also:
gasoline gasolene gas 

[3] : Moby Thesaurus II by Grady Ward, 1.0

27 moby thesaurus words for "petrol":
   avgas, benzine, coal oil, crude, crude oil, electricity, ethyl,
   ethyl gas, fossil oil, gas, gasoline, high-octane gas, high-test,
   illuminant, illuminating gas, kerosene, lead-free gas,
   light source, low-lead gas, luminant, motor oil, oil, paraffin,
   petroleum, premium gas, regular, rock oil

Petrol >> P Words
Petrol, definition of term: Petrol
petrol_pag1.html

Petrol Station >> P Words
Petrol Station, definition of term: Petrol Station
petrol+station_pag1.html