Petrol in a Diesel Car in Lechlade-on-Thames: How Worried Should You Be?
Probably less than you are now — provided nobody has started it. Till the ignition primes your pump, your starter turns, or your vehicle is driven, petrol in a diesel tank just sits there and does nothing. Which means the truthful reply to that first Lechlade-on-Thames query — "have I wrecked it?" — usually no. To keep it like that, call Petrol in Diesel then leave your motor alone. Below, this page sets out what petrol really does inside a diesel, how far it might have got, and how to stop it happening to you again.
Inside the engine: what petrol in a diesel really does
Two tasks fall to diesel on its journey through a motor. Before it burns, it protects — and then it burns. Very fine clearances are built into your injectors and the high-pressure pump, and just your diesel running through stops those surfaces grinding together.
Petrol does the first task poorly and the second not at all. The rattling comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips away the lubrication the system depends on, and any pump running on such a blend is wearing itself.
Put those together and the shape of the problem is clear. It is circulation that causes the damage, not contact. Petrol in the tank is a fuel fault. Whatever a worn pump sheds goes on, carried by your fuel, into the injectors downstream, which is why a pump that has been working on the petrol is where a mechanical fault starts.
How serious is petrol in a diesel? Four situations we see in Lechlade-on-Thames
Fuelled but not once started — as good as it gets. At a forecourt, and really only there, that petrol is still limited to your tank — since anywhere else your car was driven to reach it. The job is draining and flushing on the spot.
A brief spell of running, or just the ignition on. Once primed, your system has drawn petrol out of that tank as far as the filter and the fuel lines. Usually nothing more than clearing, cleaning and sorting the fuel filter, so still easy.
A few miles driven, and your pump has spent each of them working on thinned fuel. How hard the vehicle was driven counts as much as how far, and this work takes in that tank, your lines, the filter and fresh fuel through the entire circuit. Driving the kids to St Lawrence Church of England Primary School is one sort of trip. Driving as far as Oxford, under 25 miles away, makes a very different task — as does any mileage on the M4, under 15 miles from Lechlade-on-Thames, with the motor running hard all the way.
Driven till it protested. Knocking, an uneven idle, smoke, a throttle that has gone soft. That is your engine telling you its fuel has stopped acting like diesel. Whether it's the verge on Thames Street, a lay-by or a side street, stop there then leave it. A car pulled over soon very seldom has permanent damage, since the drain and the flush-through, which still go first, take care of it.
Lechlade-on-Thames people and that petrol in a diesel myths they hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Topping up takes out nothing; it gives you a bigger tank of the same mixture. That advice presumes a diesel fuel system tolerates petrol by percentage. It does not.
If anything, the opposite is true. Myth: "A modern diesel can cope with a bit of petrol." At higher pressure, through more precise parts: that's how a modern diesel handles its fuel, so the lubrication matters for more, not less.
One myth that catches motorists out: 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. Feed petrol to a diesel and it usually fires up, idles and drives away like nothing has happened — all the while its pump wears. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate problem. None of what petrol diluted gets put back by it — and later, that tank still contains the petrol.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in the fuel filter and lines, waiting to go straight back through the pump on the next start. Clearing petrol into a can by the roadside is also really hazardous.
Why petrol in a diesel happens so easily
A careless moment is rarely the cause, and no one means to do it. One way only, since of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally won't fit a petrol vehicle. That is how the forecourt makes it easy.
It takes place when routine and the vehicle stop matching. Courtesy car, hire car, or a vehicle that's new. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. A rushed fill on the way to Swindon with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is precisely the moment it happens. The hand does what it has always done when you add rain, a phone call or a back seat full of kids.
Next time you fill up around Lechlade-on-Thames: avoiding petrol in a diesel
- The label is what counts, and so read the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, yet not on every forecourt.
- In a car you don't know, look inside the flap over your filler or at the cap before your first fill: plenty of vehicles print the fuel there.
- Mark 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 meaning to remember.
- It seems silly and it does the trick: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump.
- Put the phone away. This is an easy mistake to make whilst you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to refuse a petrol nozzle, and add-on devices exist for cars without one. They are a backstop, not a reason to stop reading the petrol pump.
- The moment you realise, stop: less petrol inside your tank makes a weaker mix. What to do next doesn't change, though — still don't start it.
Already put petrol in a diesel in Lechlade-on-Thames?
The order of things is brief, then. Do not switch your ignition on, and don't start it. Ask the staff to help you push it away from the petrol pump if you're still on the forecourt, whether that is Texaco or somewhere else. Ring 0333 366 0103 next, with three answers — the fuel, the approximate volume, and whether it's run.
If it was AdBlue and not petrol, say so. That's a different issue — corrosion and deposits rather than lost lubrication — and it has its own page for Lechlade-on-Thames.
What makes one Lechlade-on-Thames petrol in a diesel job cost more than the next
There's no fair single quote for this, since the four situations above are four different tasks. Chiefly, the cost moves with which one you're in. The ratio counts next, meaning how much of that tank is petrol, and then the position of the vehicle and whether getting to it is safe for a technician.
Three queries come first, before any quote, rather than after — what got in, how much, has it run — and this is the reason. Their replies are what turn a range into one firm number.
About Lechlade-on-Thames
Lechlade-on-Thames is a small town situated on the southern bank of the River Thames in Gloucestershire, with a population of around 2995 people. Lechlade-on-Thames has a mix of housing types, but is predominantly characterised by detached homes. Lechlade-on-Thames is located near to several smaller settlements, including Little London, Inglesham, and Buscot Wick, and is approximately 19 miles from the city of Oxford. Lechlade-on-Thames sits at an elevation of 79 metres above sea level, in a scenic riverside setting.
Fuel drain cover across Gloucestershire, Lechlade-on-Thames included
Petrol in diesel call-outs in Lechlade-on-Thames — part of the GL postcode area — go to teams that also cover the locations round it, Little London, Inglesham and Buscot Wick included. No need to bring the car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots where we work.
In Lechlade-on-Thames and still at the petrol pump?
The best spot there is, then — that's where you are. Phone, and keep it turned off.