Petrol in a Diesel Car in Salcombe: How Worried Should You Be?
Likely less than you are now — provided nobody has started the car. Everyone in Salcombe starts with "have I ruined it?", and the fair answer is usually no: petrol left in the tank of any diesel remains harmless until priming, cranking or driving pulls it into your fuel system. Keep it like that: leave your motor off then ring Petrol in Diesel. The remainder of this page explains what petrol actually does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
Inside the engine: what petrol in a diesel does
Passing through a motor, diesel does two things at once. Before it burns, it lubricates — then it burns. What stops the surfaces inside the high-pressure pump and the injectors from wearing against one another is your diesel flowing through them — they are built to extremely fine clearances.
Of these two tasks, petrol manages the first poorly and the second not at all. The clattering comes from petrol being made not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection your system depends on, and any pump running on such a mixture is wearing itself.
The shape of the issue is plain when you put those together. The damage is done by circulation, not by contact. A tank with petrol in it is a fuel fault. 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 your fuel to the fuel injectors beyond it.
Salcombe, petrol in a diesel: four situations, from mild to serious
The best case there can be: filled up, not once started. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With the petrol held inside your tank alone, it is drained and rinsed on the spot, and nothing more is needed.
Ignition on, or started for a second. Once primed, your system has pulled petrol out of that tank as far as your filter and your lines. Normally little more than clearing, purging and seeing to the filter, so still easy.
Those few miles on the road were the pump working on fuel diluted by petrol the whole way. How hard the vehicle was driven counts as much as how far, and the work covers your tank, the lines, your filter and fresh fuel through the whole system. The school run to Salcombe Church of England Primary School is one matter. Driving as far as Plymouth, under 25 miles away, makes a very different task — as does any mileage on the M5, under 50 miles from Salcombe, with your engine labouring hard the whole time.
Knocking, a lumpy idle, smoke, a throttle gone soft: driven till it complained. That's the engine telling you its fuel no longer is acting like diesel. Whether it is the verge on Robinsons Row, a lay-by or a side road, stop where you are then leave it. Lasting damage is very rare if a car is stopped soon, and the fuel drain and flush-through that still come first deal with it.
Myths Salcombe people hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing comes out when you top up — the tank just carries more of the same blend. A diesel fuel system doesn't accept petrol by percentage in the way that advice supposes.
Not so: a modern diesel copes with a bit of petrol. If anything, the opposite. At higher pressure, through finer parts: that's how a newer diesel handles its fuel, and so the protection counts more, not less.
"It starts, it drives, and so there is no harm" — the myth that catches most motorists than any other. The motorist of a petrol engine fed diesel normally stops, since it will not run, and the harm stops there. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile your 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 different fault. What petrol has thinned stays thinned, and the petrol remains in that tank regardless.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol sits in the filter and lines, ready to go right back through your pump at the next start. Besides, petrol cleared into a can by the road is truly hazardous.
Why petrol in a diesel occurs so easily
It is seldom carelessness, and nobody 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 motor. That is how the forecourt makes it easy.
It occurs when habit and your car stop matching. Hire cars, courtesy cars, and vehicles that are new to you. One petrol and one diesel on the drive of the same household. The pumps in a different order on a familiar forecourt. Rushing for a train at the nearest station and fuelling up en route. A new-to-you diesel Renault Clio, its first fuelling, and a driver used to petrol: exactly when it occurs. The hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Next time you fill up in Salcombe: avoiding petrol in a diesel
- The label is what matters, and so read the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- In a motor you don't know, look inside the flap over your filler or at the cap before the first fill: plenty of motors print the fuel there.
- Mark 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.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. It sounds silly and it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so put the phone away then keep your mind on the petrol pump.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the petrol pump.
- Less petrol makes a thinner blend, so stop the moment you notice — while remembering that your next step is unchanged. It is still not to start it.
Already put petrol in a diesel in Salcombe?
Then the order of things is short. Do not switch your ignition on, and do not start it. The attendants on the forecourt — whether at Gulf itself or wherever you filled up — will usually help push it clear of the petrol pump if you ask. What went in, roughly how much, and if it has run: tell us that when you call 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different fault — Salcombe has a page all for it.
Why one petrol in a diesel task in Salcombe costs more than another
There is no honest single quote for this, since the four scenarios above are four separate tasks. Which of them you are in is mostly what moves the cost. The ratio counts next, meaning how much of that tank is petrol, and then the position of the car and whether reaching it is safe for a van.
Ahead of any quote, not after, we ask three questions: your fuel that got in, the volume, and whether it has run. That is why. Those replies turn a range into a straight figure.
About Salcombe and where it is
Salcombe is a small coastal town in Devon, situated on the southern coast of England, with a population of around 1583 people. Salcombe sits at a low elevation of approximately 5 metres above sea level, looking out over the sea towards the English Channel. Salcombe is surrounded by nearby places such as Batson, East Portlemouth, and Lower Batson, and is located near the city of Plymouth, which is 18.9 miles away. Salcombe has a predominance of detached housing, reflecting its attractive setting and desirability as a place to live.
Salcombe and Devon: where our fuel drain cover reaches
Batson, East Portlemouth and Lower Batson are among the locations near Salcombe that the same teams work, answering petrol in diesel calls across Salcombe's TQ postcode area. We drain wherever your car is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Still at the petrol pump around Salcombe?
Then, you couldn't be in a better place. Turned off it stays; then ring.