How Worried Should You Be? Petrol in a Diesel Car in Bridge
Unstarted? Then less worried than you likely feel. "Have I ruined it?" is the first thing anyone around Bridge asks, and the honest answer is normally no, since petrol left in a diesel tank harms nothing till it's drawn through your fuel system — by ignition priming, by your starter, or by being driven. To leave the vehicle that way, call Petrol in Diesel and leave the engine switched off. Below, this page sets out what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you again.
What petrol in a diesel does to the engine
On its way through a motor, diesel has two jobs. Before it burns, it lubricates — and then it ignites. Extremely fine gaps go into the injectors and the high-pressure pump, and just your diesel flowing through keeps those surfaces from grinding together.
The second task petrol doesn't do at all, and the first it does badly. The rattling comes from petrol being designed not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips out the protection the fuel system hinges on, and any pump running on such a mixture is wearing itself.
Combined, those leave the shape of the issue plain. Contact does not do the damage — movement does. All a tank with petrol in it amounts to is a fuel issue. Once the pump has been labouring on that petrol, a mechanical fault has begun: whatever is shed by a pump that's wearing down travels downstream to the fuel injectors with the fuel.
Bridge, petrol in a diesel: four cases, from mild to major
The best case there can be: filled up, not once started. At a forecourt, and genuinely only there, the petrol is still confined to the tank — since everywhere else your car was driven to get to it. The task is emptying and flushing on the spot.
The ignition turned on, or a short start. With the system primed, your lines and filter already hold petrol that came from the tank. Drain, flush, deal with the filter: still normally simple.
Those few miles driven were the pump running on fuel thinned by petrol the whole way. Mileage is only half of that; how hard it was driven matters equally. Either way this work runs to that tank, your lines, your filter and clean fuel through the whole circuit. The school run to Bridge and Patrixbourne Church of England Primary School is one matter. Very different again: a trip to Canterbury, under 5 miles away, or any mileage on the M2, under 10 miles from Bridge, where the engine never stopped labouring hard.
Driven until it protested. Clattering, a lumpy idle, smoke, a throttle that has gone soft. That's your motor telling you its fuel has stopped acting like diesel. Whether it is the verge on High Street, a lay-by or a side road, stop where you are and leave it. A car pulled over early very seldom has long-term damage, because the fuel drain and the flush-through, which still go first, take care of it.
Myths Bridge motorists hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing comes out when you top up — the tank just carries more of the same mixture. Percentage isn't how a diesel fuel system copes with petrol, however much that advice assumes.
Myth: "A newer diesel can cope with a bit of petrol." If anything, the reverse. Protection matters more on modern diesels, not less, since their fuel runs through finer parts at higher pressure.
"It starts, it drives, and so there is no harm" — the myth that trips up more motorists than any other. Feed diesel to a petrol engine and it normally will not run, so the driver stops — and the damage stops with them. While your pump wears, a diesel fed petrol normally starts, ticks over and drives away as though nothing has happened. Running isn't the same as fine.
An old workaround for a different issue is behind this one. Myth: "Add some two-stroke oil and drive it home." It does not put back what petrol has weakened, and that petrol is still inside the tank afterwards.
Myth: "Drain the tank yourself and you're sorted." After your engine has run, some of the petrol is no longer in that tank: it is in the filter and your lines, and it goes right back through your pump at your next start. Besides, petrol cleared into a can by the road is truly dangerous.
Petrol in a diesel: how does it take place?
Carelessness is rarely the cause, and nobody means to do it. One way only, because of the nozzles: the narrower petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol vehicle. That is how the forecourt makes it simple.
Habit and the car falling out of step is when it happens. A new car, a hire car or a courtesy car. Two motors on one driveway, one petrol, one diesel. A familiar forecourt with the pumps in a different order. A train to catch, and a rushed fill en route to Bekesbourne. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it occurs. Add rain, a phone call or a back seat full of kids, and the hand does what it has always done.
How to prevent petrol in a diesel at your next fill-up in Bridge
- The label is what counts, so read the petrol pump rather than the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt.
- Many motors state the fuel inside your filler flap or on the cap, and so check there on the first fill in any car you do not know.
- Good intentions count for less than a sticker or a fob in a bright colour on the diesel's key if a house has one of each. So label it.
- Before the nozzle leaves the pump the first time you fill a hired or new car, say "diesel" aloud. Silly, perhaps, but it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away and keep your mind on the petrol pump.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the pump.
- As soon as you notice, stop: less petrol inside that tank means a thinner blend. What to do next doesn't change, though — still do not fire it up.
Put petrol in a diesel in Bridge already?
Then the order of things is short. Leave it unstarted, with your ignition switched off too. Ask the staff to help you roll it away from the pump if you're still at the forecourt, whether that's Esso or somewhere else. What went in, about how much, and if it has run: tell us those when you call 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different problem — Bridge has a page just for it.
What makes one Bridge petrol in a diesel task cost more than the next
A fair single price does not exist here: four scenarios, four separate tasks. Which of them you are in is chiefly what moves your cost. Beyond that it's the proportion — how much petrol got in against how much the tank holds — and then where your car is and whether a technician can reach it safely.
Three questions come first, before any quote, rather than after — what got in, how much, has it run — and this is the reason. Those answers change a range into a straight figure.
About Bridge, briefly
Bridge is a village situated on the River Stour in Kent, with a riverside setting and an elevation of around 30 metres. Bridge lies close to the city of Canterbury, approximately 3 miles to the southeast, and is surrounded by nearby villages such as Patrixbourne and Bekesbourne. Bridge has a population of around 1223 people, predominantly living in semi-detached housing. Bridge is located within the South East region, about 56.9 miles from London.
Across Kent and around Bridge: fuel drain cover
Patrixbourne, Bekesbourne and Bekesbourne Hill are among the spots near Bridge that the same teams work, answering petrol in diesel jobs across Bridge's CT postcode area. No need to bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations where we work.
At the pump in Bridge, right now?
Nothing beats it: that's where you now are. Turned off it stays; then ring.