Should You Worry? Petrol in a Diesel Car in Hatch Bottom
Unstarted? Then less worried than you likely are. Petrol resting in a diesel tank does nothing to the engine until something draws it through the system — the ignition priming your pump, the starter, or driving itself. So the truthful answer to the first question everyone in Hatch Bottom asks, "have I wrecked it?", is normally no. To keep it like that, ring Petrol in Diesel then leave your engine alone. Below, you will find what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
Inside the motor: what petrol in a diesel does
Two tasks fall to diesel on its route round a motor. It lubricates to begin with, and after that does it burn. Designed to very fine tolerances, your injectors and the pump rely on your diesel flowing through them to keep their surfaces from wearing against one another.
Petrol does the first task badly and the second not at all. Being less viscous than diesel, petrol strips away the protection a fuel system needs, leaving a pump running on the mixture to wear itself. It is also made to resist igniting under compression — the reverse of what a diesel needs — which is where you hear the knocking.
Seen together, they make clear what shape the trouble takes. The harm is done by circulation, not by contact. A tank with petrol in it is a fuel issue. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the fuel injectors further on.
How serious is petrol in a diesel? Four scenarios our engineers see in Hatch Bottom
Filled but never started — as good as it gets. On a forecourt, and truly only there, the petrol is still limited to your tank — because everywhere else your car was driven to get to it. The job is emptying and rinsing on the spot.
A moment's running, or just the ignition on. Once primed, your system has drawn petrol from the tank as far as your filter and your lines. Normally nothing more than draining, rinsing and seeing to the filter, so still straightforward.
Some miles driven, and your pump has spent each of them working on diluted fuel. How hard your car was driven counts as much as how far, and this work takes in that tank, the lines, your filter and fresh fuel through the entire system. Short trips, such as the school run to Saint James' Church of England Primary School, are one thing. Very different a second time: a trip to Southampton, under 5 miles away, or any mileage on the M27, under a mile from Hatch Bottom, where the motor never stopped working hard.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone lumpy. The engine is telling you the fuel is no longer behaving like diesel. Whether it is the verge on Noyce Court, a lay-by or a side street, stop where you are then leave it. Long-term damage is very uncommon when a car is pulled over quickly, and the fuel drain and flush-through that still come first sort it out.
Myths Hatch Bottom 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. Topping up removes nothing; it gives you a bigger tank of the same mixture. Percentage isn't how a diesel fuel system tolerates petrol, however much that guidance assumes.
"Modern diesels can handle a little petrol" — a myth, and nearer the reverse. Finer parts and higher pressure are the way a current diesel runs its fuel, and that makes the protection count more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor generally leaves a motor that won't run: the driver stops, and so does the harm. While your pump wears, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. A running engine does not mean fine.
Myth: "Add some two-stroke oil and drive it home." It's an outdated workaround for a different issue. That petrol is still inside that tank afterwards, and what it has diluted isn't put back.
"Drain it yourself and you're sorted" — a myth, since after it's been running some petrol sits in your filter and lines, waiting to go right back through your pump at your next start. It's also really risky to drain petrol into a can by the kerbside.
Why petrol in a diesel occurs at all
It's rarely carelessness, and nobody does it on purpose. A diesel nozzle generally won't go into a petrol vehicle, but the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error simple, and only in that direction.
When routine and the vehicle stop matching, it occurs. A new car, a hire car or a courtesy car. Households running one of each, petrol and diesel. A familiar forecourt with the pumps in a different order. A train to catch, and a rushed fill en route to Hedge End. A new-to-you diesel Renault Megane, its first fuelling, and a motorist accustomed to petrol: exactly when it takes place. Throw in a back seat full of kids, a phone call or rain, and the hand takes over.
Hatch Bottom drivers: how to prevent petrol in a diesel next time
- Read the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on every forecourt. The label is what counts.
- Plenty of cars state the fuel inside the filler flap or on the cap, and so check it on your first fill in any car you do not know.
- Label your key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. It seems silly and it works.
- While you are thinking about something else, this is an easy mistake to make — so put the phone away.
- Some diesels have a filler designed to block a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the petrol pump.
- Noticing it halfway? Stop at once. A weaker mix follows from less petrol in the tank, yet your next step remains the same: do not crank it.
Petrol already in a diesel around Hatch Bottom? Start here
Then the order of things is short. Starting it is out, and so is switching on the ignition. If you're still at the forecourt — Sainsbury's or anywhere else — ask the staff to help you push the car clear of the petrol pump. What got in, roughly how much, and whether it has run: tell us that when you ring 0333 366 0103.
If it was AdBlue instead of petrol, say so. That is a different issue — corrosion and deposits instead of lost lubrication — and it has its own page for Hatch Bottom.
Hatch Bottom petrol in a diesel tasks: why one costs more than another
There is no fair single price for this, since the four situations above are four different tasks. Which of them you're in is chiefly what shifts the cost. Where your car is matters too, and whether a van can safely get to it, after the share of petrol to what your tank holds.
That is why our technicians ask three queries before costing instead of after: what got in, how much, and if it's run. Those replies are what change a range into one firm number.
About Hatch Bottom, briefly
Hatch Bottom is a locality in Hampshire, situated inland near the city of Southampton, at an elevation of approximately 43 metres. Hatch Bottom lies within the South East region of England, about 65.5 miles from London, and is surrounded by nearby places such as West End and Thornhill Park. Hatch Bottom is characterised by its predominantly detached housing stock, reflecting its residential nature. Hatch Bottom is home to a population of around 2013 people, according to approximate estimates.
Fuel drain cover across Hampshire, Hatch Bottom included
West End, Thornhill Park and Dowds Farm are among the spots near Hatch Bottom that the same teams work, answering petrol in diesel jobs across Hatch Bottom's SO postcode area. A forecourt, a supermarket car park, a lay-by or your own drive are all locations our engineers drain, and the car does not need to come to us.
At the pump in Hatch Bottom, right now?
Then, you couldn't be in a better spot. Turned off it remains; then call.