No, nobody is swapping the hoses at your petrol station
The rumour about swapping fuel hoses at petrol stations doesn't hold up: nozzle diameters, sensors and the fuel selector all prevent it. The warning, debunked.
English · Original discussion in Spanish · Published
Swapping hoses at the petrol station: the myth that doesn't wash
A night-time cyclist, the kind who brags about riding in "beast mode", stops at a petrol station to pump up his tyres. And between one pedal stroke and the next, he recalls a memory: he claims that back in the day he used to swap the petrol and diesel hoses around so that absent-minded drivers would fill up with the wrong fuel. His warning, "be careful when refuelling today", has met with a unanimous response: it's a tall tale.
Why it's technically impossible
The technical reasons leave little room for fantasy. To begin with, diesel and petrol nozzles have different diameters: the diesel one won't fit into a tank designed for petrol, and the petrol one won't make the necessary turn in a diesel tank. On top of that, modern pumps have sensors that detect which hose is being lifted and only activate the corresponding pump. The system is designed to make the mistake physically almost impossible.
And if someone insists on the manual route, there's still the fuel selector: on any modern pump, you choose what you want to refuel with on the screen. If you select petrol, petrol comes out. No trick will work.
The real mistake exists, but it's not this one
No one disputes that fuel mix-ups happen: every year drivers put diesel in a petrol engine by accident. But that's carelessness, not sabotage. What was being told here doesn't hold up, nor does the alarmist warning that came with it. The anecdote, though, has been rated 1 out of 10. A fail.
A night-time cyclist, the kind who brags about riding in "beast mode", stops at a petrol station to pump up his tyres. And between one pedal stroke and the next, he recalls a memory: he claims that back in the day he used to swap the petrol and diesel hoses around so that absent-minded drivers would fill up with the wrong fuel. His warning, "be careful when refuelling today", has met with a unanimous response: it's a tall tale.
Why it's technically impossible
The technical reasons leave little room for fantasy. To begin with, diesel and petrol nozzles have different diameters: the diesel one won't fit into a tank designed for petrol, and the petrol one won't make the necessary turn in a diesel tank. On top of that, modern pumps have sensors that detect which hose is being lifted and only activate the corresponding pump. The system is designed to make the mistake physically almost impossible.
And if someone insists on the manual route, there's still the fuel selector: on any modern pump, you choose what you want to refuel with on the screen. If you select petrol, petrol comes out. No trick will work.
The real mistake exists, but it's not this one
No one disputes that fuel mix-ups happen: every year drivers put diesel in a petrol engine by accident. But that's carelessness, not sabotage. What was being told here doesn't hold up, nor does the alarmist warning that came with it. The anecdote, though, has been rated 1 out of 10. A fail.
Also available in: Deutsch
Summary of a discussion on Burbuja.info - Foro de economía, actualidad y política., translated from Spanish and reviewed before publication. Read the full discussion (11 replies).
More summaries
-
Gas vs Diesel Hatchback Longevity: Real Mileage and Costs
We analyze real mileage cases for gasoline and diesel cars, revealing the true cost of maintaining a vehicle over time.
-
Gas Station Loaf vs. Artisan Bakery: The Consumer Showdown
Artisan loaves start at €1, but mass-produced bread competes with a soft crumb. Refined flour and texture remain hotly debated.
-
Myopia, Floaters, and the Fear of Vision Loss
Black spots in vision after getting new glasses: what are floaters, when to seek urgent care, and why they don't mean blindness.
-
Aging gracefully: surgery vs. genetics at 64
Madonna and Susanna Hoffs, both 64, illustrate two opposite ways of facing aging: surgery and gym versus habits and good spirits.
-
Retro collecting boom: battery-free watches and Golf GTIs at 8,000 euros
Battery-free Casio watches, Golf GTIs at 8,000 euros and 90s manuals are selling like hot cakes, according to one forum user. Retro collecting has become…
-
Why some fruit keeps ripening after it's picked
Not all fruit continues to ripen after harvest. The difference between climacteric and non-climacteric fruit, the role of ethylene and the truth about ripening rooms.