Easterton: Petrol in a Diesel Car? How Worried to Be
If it has not been started, worry less than you likely are. Everyone around Easterton begins with "have I wrecked it?", and the fair answer is normally no: petrol left inside your tank of a diesel remains harmless until priming, cranking or driving pulls it into the fuel system. Keep it that way: leave your motor off and ring Petrol in Diesel. What petrol actually does to a diesel, how to gauge how far it has travelled, and how to stop it from happening again: that is the remainder of this page.
Petrol in a diesel: what does it do to the engine?
Two jobs fall to diesel on its route through a motor. Before it ignites, it lubricates — and then it ignites. Designed to very fine clearances, your injectors and your pump depend on the diesel moving through them to keep their surfaces from wearing against one another.
Petrol does the first job badly and the second not at all. Being less viscous than diesel, petrol strips out the protection a fuel system needs, leaving a pump running on the mixture to wear itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you hear the knocking.
Taken together, they make clear the shape the trouble takes. The harm is done by movement, not by contact. All a tank with petrol in it amounts to is a fuel issue. The start of a mechanical one is a pump that has been labouring on that petrol — and whatever a worn pump sheds travels on with the fuel to the fuel injectors beyond it.
How bad is petrol in a diesel? Four situations our technicians see around Easterton
The best case there can be: filled up, not once started. Only your tank has petrol in it, and so the job is clearing your tank and cleaning the system where your car stands. This scenario can only really take place at a forecourt: anywhere else, the car got there by being driven.
Started for a moment, or only the ignition on. The system has been bled, so petrol has left your tank and got to the fuel filter and your lines. Normally little more than draining, rinsing and sorting your filter, and so still straightforward.
Those few miles on the road meant the pump labouring on fuel diluted by petrol the whole way. The work is that tank, your lines, the filter and clean fuel through the entire circuit, and how hard the vehicle was driven counts as much as how far. Driving the children to St Barnabas Church of England School, Market Lavington is one kind of trip. A run as far as Salisbury, under 25 miles away, is a very different task. So is any mileage on the M4, under 25 miles from Easterton, where the motor has been working hard throughout.
Driven on until it complained — rattling, smoke, an uneven idle, a dead throttle. What you are hearing is the engine signalling fuel that no longer acts like diesel. Leave it wherever it stops: a lay-by, a quiet street, the verge on Strawberry Fields. Lasting damage is very unusual when a car is pulled over soon, and the drain and flush-through that still come first deal with it.
Petrol in a diesel stories Easterton motorists hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Topping up removes nothing; it gives you a fuller tank of the same mix. The assumption behind the guidance — that diesel fuel systems accept petrol by percentage — is wrong.
If anything, the opposite is true. Myth: "A newer diesel can cope with a bit of petrol." At higher pressure, through more precise parts: that is how a modern diesel handles its fuel, and so the lubrication matters more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches people. Feed diesel to a petrol engine and it generally won't run, so the driver stops — and the damage stops with them. Feed petrol to a diesel and it generally starts, ticks over and pulls away as if nothing happened — all the while its pump wears. Running isn't the same as fine.
An outdated fix for a different issue is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." It does not put back what petrol has diluted, and the petrol is still in your tank later on.
Myth: "Drain that tank yourself and you are sorted." Once the motor has been run, some of that petrol is no longer inside the tank: it's in your filter and the lines, and it goes right back through the pump on the next start. Emptying petrol into a can at the roadside is also truly risky.
Petrol in a diesel: how does it happen?
It is seldom carelessness, and no one does it on purpose. 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 will not fit a petrol car. That is how the forecourt makes it easy.
It occurs when habit and the car stop matching. A new vehicle, a hire car or a courtesy car. Two motors on one drive, one petrol, one diesel. Your ordinary forecourt, its pumps now in a different order. Fuelling up in a hurry en route to Pewsey, with a train to catch. A new-to-you diesel Volkswagen Tiguan, its first fuelling, and a driver used to petrol: exactly when it happens. The hand repeats what it has always done once you add rain, a phone call or a back seat full of kids.
Avoiding petrol in a diesel next time you fill up in Easterton
- The label is what matters, so check the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- Inspect your filler flap. Plenty of vehicles state the fuel inside the flap or on the cap. Look at it on the first fill in a vehicle you do not know.
- Good intentions do less than a sticker or a fob in a bright colour on your diesel's key when a household has one of each. So mark it.
- Before the nozzle comes off the pump the first time you fuel a hired or new vehicle, say "diesel" out loud. Silly, perhaps, but it works.
- Thinking about something else is when this becomes an easy mistake to make, so tuck your phone away and keep your mind on the pump.
- Add-on devices are available for cars without one, and some diesels come with a filler that won't take a petrol nozzle. Useful — but a backstop only, never a reason to stop checking the label.
- Less petrol makes a weaker mix, so stop as soon as you notice — while remembering that your next step is unchanged. It is still not to fire it up.
Put petrol in a diesel in Easterton already?
Short and simple, then, is the order of things. Don't switch your ignition on, and don't fire it up. The attendants on the forecourt — whether at Esso itself or wherever you filled up — will normally help roll it away from the petrol pump if you ask. Next, 0333 366 0103. We'll ask what was put in, roughly how much, and if it has been run.
If it was AdBlue and not petrol, say so. That is a different issue — corrosion and deposits rather than lost lubrication — and it has its own page for Easterton.
Easterton petrol in a diesel jobs: why one costs more than another
There is no honest single price for this, since the four scenarios above are four separate jobs. What shifts your cost is mostly which of them you're in. The share matters next, meaning how much of that tank is petrol, and then the position of the vehicle and whether reaching it is safe for a van.
Before any quote, not after, we ask three questions: your fuel that got in, its quantity, and whether it's run. That is why. With those answers, there is a straight figure rather than a range.
About Easterton
Easterton is a small village in Wiltshire, situated inland at an elevation of 97 metres, with detached housing being the predominant type of accommodation. Easterton lies approximately 17 miles from Salisbury and 80 miles from London, making it a rural community with easy access to larger cities. Easterton is surrounded by nearby places such as Eastcott, Fiddington Sands, and Easterton Sands, which are all part of the local landscape. Easterton has a population of around 580 people, giving it a quiet and peaceful atmosphere.
Fuel drain cover in Easterton and across Wiltshire
Petrol in diesel call-outs in Easterton — part of the SN postcode area — go to vans that also cover the spots about it, Eastcott, Fiddington Sands and Easterton Sands included. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots our technicians drain, and your car doesn't need to come to us.
Still at the pump around Easterton?
Then you are in the best spot there can be. Call, and keep it switched off.