How Worried Should You Be? Petrol in a Diesel Car in Hedgefield
Unstarted? Then less anxious than you likely are. Till the ignition primes the pump, your starter turns, or your vehicle is driven, petrol in a diesel tank simply rests there and does no harm. Which means the honest reply to the first Hedgefield query — "have I ruined it?" — usually no. Petrol in Diesel is who to phone, with the motor left off, and so it remains that way. Below, this page sets out what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
Petrol in a diesel: what does it do to your engine?
Passing through an engine, diesel is doing two things at the same time. Before it burns, it lubricates — then it combusts. Made to extremely fine tolerances, your injectors and the pump depend on your diesel flowing through them to keep their surfaces from wearing against one another.
Badly at the first, not at all at the second: that is petrol. It's runnier than diesel and removes the protection the system depends on, and so a pump running on a petrol mix is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the knocking comes from.
Taken together, they show the shape the issue takes. It's circulation that does the damage, not contact. A tank with petrol in it is a fuel issue. The beginning of a mechanical problem is a pump that has been running on that petrol — and whatever a worn pump sheds moves on with the fuel to your injectors beyond it.
Petrol in a diesel around Hedgefield: how serious is it? Four cases
Fuelled, and not started: nothing beats it. Only the tank has petrol in it, so the job is emptying that tank and purging the fuel system where the vehicle sits. This scenario can only truly occur at a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or merely your ignition on. The system has been primed, and so petrol has left that tank and got to the filter and your lines. Normally little more than emptying, flushing and sorting your filter, so still easy.
A few miles driven, and your pump has spent each of them running on diluted fuel. Tank, lines, filter, then fresh fuel put through the entire system: that is the work, and the way your car was driven counts as much as the miles. Short trips, like the school run to Crookhill Community Primary School, are one matter. Very different again: a run to Newcastle upon Tyne, under 10 miles away, or some distance on the Central Motorway East, under 10 miles from Hedgefield, where the motor never stopped running hard.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. The motor is telling you the fuel is no longer behaving like diesel. Pull up on the spot — on the verge on Main Road, at the kerb, down a side road — and do not move it again. The drain and flush-through still come first, and they take care of it: when a car is stopped soon, permanent damage is very unusual.
Hedgefield drivers and that petrol in a diesel stories they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up takes out nothing; it gives you a bigger tank of the same mixture. A diesel fuel system does not accept petrol by percentage in the way that guidance assumes.
Myth: a modern diesel copes with a bit of petrol. Rather, the opposite. A newer diesel sends its fuel through smaller components at higher pressure, which makes the protection matter more, not less.
One myth that catches people off guard: if it starts and drives, it must be unharmed. A petrol motor fed diesel normally will not run, and so the motorist stops and the harm stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile your pump grinds. Fine and running aren't the same at all.
An old fix for a different fault is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." It doesn't put back what petrol has weakened, and that petrol is still in that tank later on.
The next start sends petrol back round the pump from the lines and your filter, where some of it sits once the engine has run. That's why draining your tank yourself does not leave you sorted — a myth. On top of that, petrol emptied into a can by the road is truly risky.
Petrol in a diesel: how does it take place?
No one does it on purpose, and it's seldom carelessness. A diesel nozzle generally won't fit a petrol car, yet the narrower petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error simple, and just in one direction.
Routine and your car falling out of step is how it takes place. Hire cars, courtesy cars, and motors that are new to you. A household with one petrol and one diesel on the drive. Your normal forecourt, its pumps suddenly in a different order. Filling up in a hurry en route to Blaydon, with a train to catch. A new-to-you diesel Volkswagen Tiguan, its first fuelling, and a driver accustomed to petrol: exactly when it takes place. Throw in a back seat full of kids, a phone call or rain, and habit takes over.
Hedgefield people: how to avoid petrol in a diesel next time
- The label is what counts, and so check the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, yet not on each forecourt.
- Check the filler flap. Many vehicles state the fuel type inside the flap or on the cap. Look at it on your first fill in any vehicle you don't know.
- Good intentions count for less than a sticker or a fob in a bright colour on the diesel's key if a household has one of each. So mark it.
- Before the nozzle leaves the pump the first time you fill a hired or new motor, say "diesel" out loud. Silly, yes, but it does the trick.
- Mistakes like this are easy to make whilst your mind is on something else, so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler built to block a petrol nozzle, and add-on devices are available for vehicles without one. They are a backstop, not a reason to stop reading the petrol pump.
- Stop as soon as you notice. Less petrol inside the tank means a weaker mixture. It doesn't change what to do next, which is still not to fire it up.
Hedgefield: already put petrol in a diesel?
Then the order of things is brief. Leave it unstarted, with your ignition off too. Still on the forecourt, at Shell or anywhere else? Ask the staff to help you roll the car clear of the pump. Call 0333 366 0103 next, with three facts — your fuel, the rough volume, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a separate problem — Hedgefield has a page just for it.
What makes one Hedgefield petrol in a diesel job cost more than the next
A fair single quote doesn't exist here: four scenarios, four separate jobs. What moves your cost is mostly which of them you are in. After that it is the proportion — how much petrol got in against how much your tank takes — and after that where your car is and whether a van can reach it safely.
That's why we ask three queries before quoting rather than after: what got in, how much, and whether it has run. A range becomes a straight figure when the replies are in.
About Hedgefield
Hedgefield is a suburban area located on the riverside in Tyne and Wear, with an elevation of around 40 metres. Hedgefield sits near the city of Newcastle upon Tyne, approximately 5.2 miles away, and is close to nearby places such as Stella, Crookhill, and Stargate. Hedgefield has a population of around 2270 people and predominantly consists of semi-detached housing.
Fuel drain cover around Hedgefield and across Tyne and Wear
Stella, Crookhill and Stargate are among the places around Hedgefield that the same teams work, answering petrol in diesel jobs across Hedgefield's NE postcode area. The car doesn't need to come to us: our engineers drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Still at the pump around Hedgefield?
Then you're in the best position there is. Turned off it stays; then ring.