A post on Facebook, shared more than half a million times, warns that filling a fuel tank in hot weather could cause the tank to explode.
“Due to [an] increase in temperature in the coming days, please don’t fill petrol to the maximum limit. It may cause [an] explosion in the fuel tank. Please fill the tank about half and allow space for air.”
This is not true, and has already been debunked a number of times online.
In 2018, a spokesperson for motoring organisation RAC, Rod Dennis, said: “All fuel systems on passenger vehicles are designed to cope with any expansion of fuel, or vapour coming from the fuel.
“There is no risk of explosion from filling up a fuel tank fully and drivers should have no concerns in doing so.”
In their fact check of a similar post, fact checking service Snopes write: “The temperature at which fuel auto-ignites (i.e. the temperature at which fuel will combust without a trigger or spark) is around 495ºF [257C].
“This level is far higher than any temperature a covered, insulated tank could possibly achieve simply by being driven or parked on planet Earth.”