An MHK says he's worried falls in petrol prices aren't being passed on to motorists as quickly as they should be.
North Douglas politician David Ashford will ask the Office of Fair Trading chairman about the issue in Tynwald.
He wants to know if the OFT tracks petrol prices to see if consumers benefit from price changes.
He says companies buy the fuel in advance to guarantee its price - but while price rises are passed on falls don't seem to be:
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Government wants permanent paving around TT VIP area
Delays to buses this morning
Changes to 1st time buyers schemes planned
Nobody will lose benefits after MiCards, says minister
Further weather warning in place for later today
Minor Injuries Unit based at Noble's from today
Vandals hit community centre play equipment