Police are urging petrol stations to switch to pre-pay only, to stop people stealing fuel.

Fuel app Gaspy is pricing 91 at an average $3.28 a litre today, with diesel sitting on $3.44. 

Police say they're being called to about 100 more thefts every week, since the fuel crisis began.  

Assistant Commissioner Tusha Penny says recently, diesel thefts from rural properties have been rising. 

"At the beginning of March, it was probably around 20 per week we were looking at, and as of April, we're looking at 50 offences per week - that's a significant increase." 

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