Should You Worry? Petrol in a Diesel Car in Broadhempston
Far less than you probably are, if it hasn't been started. Petrol sitting in a diesel tank does nothing to your engine until something draws it through the fuel system — your ignition priming your pump, your starter, or driving on its own. So the honest answer to the first question anyone in Broadhempston asks, "have I ruined it?", is normally no. To leave the vehicle like that, ring Petrol in Diesel and leave your motor switched off. Below, this page sets out what petrol actually does inside a diesel, how far it might have got, and how to stop it happening to you a second time.
Petrol in a diesel: what does it do to your engine?
Diesel does two jobs on its way through a motor. Oiling comes before burning; it does both. What keeps the surfaces inside the high-pressure pump and the injectors from wearing against one another is the diesel flowing through them — they are built to extremely fine tolerances.
The second job petrol doesn't do at all, and the first it does poorly. It's thinner than diesel and takes away the lubrication the system hinges on, and so a pump running on a petrol mix is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the clattering comes from.
Combined, those make the shape of the problem clear. It is circulation that does the damage, not contact. Petrol in the tank is a fuel fault. Once the pump has been labouring on that petrol, a mechanical issue has begun: anything shed by a pump that is wearing down is carried downstream to the fuel injectors with your fuel.
How bad is petrol in a diesel? Four scenarios our engineers see in Broadhempston
Fuelled, and not started: nothing beats it. At a forecourt, and genuinely only there, the petrol is still confined to that tank — since anywhere else your car was driven to reach it. The task is draining and cleaning on the spot.
The ignition switched on, or a short start. Once primed, the system has drawn petrol out of your tank as far as the fuel filter and your lines. Usually little more than draining, purging and seeing to the filter, and so still simple.
The pump has worked a couple of miles on thinned fuel — that is what driving the vehicle does. Distance is only half of that; how hard it was driven counts equally. Either way this work runs to the tank, the fuel lines, the fuel filter and fresh fuel through the entire system. Driving the children to Broadhempston Village Primary School is one kind of trip. Any miles on the M5, under 25 miles from Broadhempston, means the engine has worked hard throughout, and a run to Exeter, under 25 miles away, makes a very different job as well.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. That is your motor telling you its fuel no longer is behaving like diesel. Whether it's the verge on Shop Hill, a lay-by or a side road, stop where you are then leave it. What goes first is still the drain and flush-through, and that sorts it out, with long-term damage very rare when a car is pulled over quickly.
Broadhempston 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." Nothing is removed when you top up — your tank just carries more of the same mixture. That advice assumes a diesel fuel system tolerates petrol by percentage. It does not.
"Modern diesels can handle a little petrol" — a myth, and closer to the opposite. A modern diesel runs its fuel through finer components at higher pressure, which makes the protection matter more, not less.
The myth that catches motorists out: if it starts and drives, it must be unharmed. Feed diesel to a petrol engine and it generally won't run, and so the driver stops — and the damage 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.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a different issue. It doesn't put back what petrol has thinned, and the petrol is still inside your tank afterwards.
The next start draws petrol back round the pump out of the fuel lines and the filter, where some of it ends up once the engine has run. That's why draining your tank yourself doesn't leave you sorted — a myth. It's also really hazardous to drain petrol into a can by the kerbside.
How does petrol in a diesel happen?
A careless moment is rarely the cause, and nobody means to do it. The petrol nozzle is the narrower of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol vehicle at all. The forecourt makes it simple, and the slip runs one way.
Routine and the car getting out of step is when it takes place. A car that's new to you — a hire car, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps arranged differently. A hurried fill en route to Totnes with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it takes place. Add a back seat full of children, a phone call or rain, and habit wins.
How to prevent petrol in a diesel on your next fill-up around Broadhempston
- A green handle for unleaded and black for diesel is usual in the UK — but not on every forecourt. Go by the label on the pump, not the colour.
- Many cars state the fuel type inside your filler flap or on the cap, so check there on your first fill in any car you do not know.
- Label the key. In a house with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- Before the nozzle leaves the pump the first time you fill a hired or new vehicle, say "diesel" out loud. Silly, yes, but it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, so tuck your phone away then keep your mind on the petrol pump.
- Some diesels come with a filler designed to reject a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the pump.
- Stop as soon as you notice. Less petrol in that tank means a thinner blend. It does not change what to do next, which is still not to start the vehicle.
Put petrol in a diesel around Broadhempston already?
Short and simple, then, is the order of things. Don't switch your ignition on, and do not crank it. Yet at the forecourt, at Red Post Garage or anywhere else? Ask the staff to help you push the car away from the petrol pump. Ring 0333 366 0103 next, with three facts — the fuel, the approximate quantity, and if it has run.
Say so if it was AdBlue rather than petrol: it is a separate issue, with its own page for Broadhempston, because AdBlue brings corrosion and deposits instead of lost lubrication.
Why one petrol in a diesel task around Broadhempston costs more than another
There's no honest single price for this, because the four situations above are four separate jobs. The scenario itself does most of the work of moving the cost. Where your car is counts too, and whether a technician can safely get to it, after the ratio of petrol to what your tank takes.
Three questions come first, before any quote, instead of after — what got in, how much, has it run — and that is the reason. Those answers are what change a range into one firm number.
About Broadhempston itself
Broadhempston is a village in Devon, situated near the River Dart and surrounded by rolling countryside. Broadhempston sits at an elevation of approximately 40 metres, with the village centre close to the riverside. Broadhempston is located near several smaller settlements, including Forder Green and Torbryan, and is around 17.9 miles from the city of Exeter. Broadhempston has a population of around 740 people, predominantly living in detached houses.
Fuel drain cover across Devon, Broadhempston included
Forder Green, Torbryan and Staverton are among the spots around Broadhempston that the same vans work, answering petrol in diesel calls across Broadhempston's TQ postcode area. You need not move your car to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations we drain.
Still at the petrol pump in Broadhempston?
Then you are in the best position there is. Leave the car turned off, and ring.