Should You Worry? Petrol in a Diesel Car in Endon
Likely less than you are now — provided no one has started the vehicle. Everyone around Endon begins with "have I wrecked it?", and the fair answer is normally no: petrol resting inside your tank of any diesel stays harmless till priming, cranking or driving pulls it into the system. Petrol in Diesel is who to ring, with your motor left off, so it stays that way. Below, you will find what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you a second time.
The engine and petrol in a diesel: what goes on
Passing through an engine, diesel does two jobs at the same time. Before it combusts, it protects — then it ignites. Very fine clearances go into the injectors and the high-pressure pump, and only your diesel running through keeps their surfaces from grinding together.
Petrol handles the first job badly and the second not at all. Being less viscous than diesel, petrol strips out the lubrication a fuel system needs, leaving a pump on the blend wearing itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the rattling.
Taken together, they show the shape the problem has. Not contact but movement is what causes the harm. Where the petrol is only in that tank, it's a fault of fuel, nothing more. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors further on.
Four situations we see in Endon: how serious is petrol in a diesel?
Filled but never started — the best it gets. The petrol is in your tank and only the tank, and the job is a drain and a flush where the car stands. This is the one situation that can only really take place at a forecourt, because anywhere else the vehicle has been driven to get there.
Started for a moment, or only the ignition on. With the system primed, the lines and filter now contain petrol that came from the tank. Usually little more than emptying, rinsing and sorting your filter, so still simple.
Driven a few miles. Now your pump has spent those miles running on diluted fuel. Miles is only half of that; how hard it was driven counts equally. Either way the work runs to that tank, your lines, the filter and clean fuel through the entire system. Short trips, such as the school run to St Luke's CofE Academy Endon, are one thing. Very different once more: a trip to Stoke-on-Trent, under 5 miles away, or some distance on the M6, under 10 miles from Endon, where the motor kept running hard.
Driven until it protested. Rattling, a lumpy idle, smoke, a throttle that has gone soft. The fuel is not acting like diesel any more, and your motor is saying so. Leave it where it has stopped: a lay-by, a side street, the verge on Leek Road. Lasting damage is very uncommon when a car is pulled over early, and the fuel drain and flush-through that still come first deal with it.
Petrol in a diesel myths Endon drivers hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It won't. Topping up takes out nothing; it gives you a fuller tank of the same mix. Percentage isn't how a diesel fuel system tolerates petrol, however much that advice supposes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. Finer parts and higher pressure are how a modern diesel runs its fuel, and that makes the lubrication count more, not less.
The myth that catches drivers off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor usually means a motor that will not run: the driver stops, and so does the harm. While your pump grinds, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. A running engine does not mean fine.
Not so: a two-stroke additive makes it safe to drive home. It is an old fix, supposed for another issue. What petrol has thinned remains weakened, and that petrol stays in your tank anyway.
If the motor has been run, part of the petrol sits in the fuel filter and your lines, not that tank — and the next start pulls it right back through your pump. So the myth "drain that tank yourself and you're sorted" doesn't hold. Also, a can of petrol drained by the roadside is genuinely dangerous.
How does petrol in a diesel take place?
A careless moment is seldom the cause, and no one means to do it. The forecourt makes it simple: the petrol nozzle is the smaller of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle generally won't go into a petrol motor at all. So the error runs one way.
Routine and the vehicle falling out of step is when it takes place. Courtesy car, hire car, or a car that's new. Households running one of each, petrol and diesel. A well-known forecourt with the pumps in a different order. A train to catch, and a rushed fill on the way to Longport. Years of petrol motors behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. Add a back seat full of kids, a phone call or rain, and habit wins.
How to prevent petrol in a diesel on your next fill-up around Endon
- The label is what matters, and so check the pump rather than the colour: in the UK unleaded handles are normally green and diesel black, yet not on each forecourt.
- Many motors state the fuel inside the filler flap or on the cap, and so check it on the first fill in any motor you do not know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of intending to remember, in a home with one of each.
- It sounds daft and it works: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump.
- Whilst you're thinking about something else, this is an easy mistake to make — so tuck the phone away.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to reject a petrol nozzle, and add-on devices are available for the rest. Count it as a safety net, and keep checking the petrol pump.
- Less petrol makes a thinner blend, and so stop as soon as you notice — though remembering that the next stage is unchanged. It's still not to fire it up.
Put petrol in a diesel in Endon already?
The order of things is short, then. Starting it is out, and so is turning on your ignition. If you're still on the forecourt — Esso or anywhere else — ask the attendants to help you roll the vehicle clear of the pump. What got in, about how much, and if it's run: tell us those when you ring 0333 366 0103.
Corrosion and deposits form the trouble with AdBlue, where petrol brings lost protection. So if it was AdBlue, say so — and see its own Endon page.
What makes one Endon petrol in a diesel job cost more than the next
An honest single quote doesn't exist here: four scenarios, four separate tasks. What moves your cost is chiefly which of them you are in. The ratio counts next, meaning how much of that tank is petrol, and then the location of your car and whether reaching it is safe for a van.
What got in, how much, and if it's run — three queries we ask before quoting, not after, for exactly that reason. Those answers change a range into a straight figure.
About Endon, briefly
Endon is a village in Staffordshire, situated on the banks of a river at an elevation of 157 metres, with Endon being close to the city of Stoke-on-Trent, approximately 4.5 miles away. Endon has a population of around 1201 residents, with Endon predominantly featuring detached housing. Endon is located in the West Midlands region, about 137.1 miles from London.
Across Staffordshire and around Endon: fuel drain cover
Endon sits in the ST postcode area, and our teams that answer petrol in diesel call-outs there work the places around it as well — Endon Bank, Stanley Moss and Stanley among them. The vehicle doesn't need to come to us: we drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
In Endon and still at the pump?
Then you are in the best spot there can be. Leave the car switched off, and ring.