How Worried Should You Be? Petrol in a Diesel Car in Whitfield
Far less than you probably are, provided it hasn't been started. Until the ignition primes your pump, your starter turns, or your vehicle is driven, petrol in a diesel tank just waits there and does no harm. Which means the honest reply to that first Whitfield question — "have I wrecked it?" — normally no. Keep it like that: leave your motor off then ring Petrol in Diesel. The rest of this page sets out what petrol actually does to a diesel, how to judge how far it has got, and how to make sure it doesn't happen to you again.
Inside the motor: what petrol in a diesel does
Diesel has two tasks on its way through a motor. Before it burns, it protects — then it ignites. Extremely fine gaps go into the fuel injectors and your high-pressure pump, and only your diesel flowing through keeps their surfaces from grinding together.
Badly at the first, not at all at the second: that's petrol. A pump running on a petrol blend is wearing itself out, because petrol is runnier than diesel and takes away the protection the fuel system depends on. Petrol is also made to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where any knocking starts.
Taken together, they show what shape the problem has. The harm is done by movement, not by contact. Where the petrol is only inside the tank, it is a fault of fuel, nothing more. A pump that has been working on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the fuel injectors further on.
How serious is petrol in a diesel? Four situations our engineers see in Whitfield
The best case there can be: filled up, not once started. The petrol is inside that tank and only the tank, and the job is a drain and a flush where the car sits. This is the one scenario that can only really happen at a forecourt, since anywhere else your car has been driven to get there.
Ignition on, or started for a second. Petrol has come out of the tank and reached the fuel filter and the lines, because the fuel system has been bled. That's normally still a straightforward job — a drain, a flush, and your filter seen to.
Those few miles driven were your pump labouring on fuel diluted by petrol throughout. Tank, lines, filter, then clean fuel run through the whole circuit: that is the work, and the way the car was driven matters as much as the distance. Driving the children to Whitfield Aspen School is one sort of trip. Very different a second time: a run to Canterbury, under 15 miles away, or any miles on the M20, under 10 miles from Whitfield, where the engine kept working hard.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. The motor is telling you your fuel is no longer behaving like diesel. Leave it where it stops: a lay-by, a quiet street, the verge on Sandwich Road. The fuel drain and flush still come first, and they deal with it: when a car is stopped soon, permanent damage is very unusual.
What Whitfield people get told about petrol in a diesel — and the myths in it
False: topping up to full with diesel makes it fine. It doesn't. Nothing is removed by topping up — you are left with a fuller tank, still the same mixture. Percentage isn't how a diesel fuel system tolerates petrol, whatever that guidance assumes.
If anything, the opposite holds. Myth: "A modern diesel can cope with a bit of petrol." Protection matters more on current diesels, not less, since their fuel passes through finer parts at higher pressure.
Myth: "If it starts and drives, there's no harm done." This is the one that catches people. Diesel in a petrol motor usually leaves a motor that will not run: the driver stops, and so does the harm. While the pump grinds, a diesel fed petrol normally starts, ticks over and drives away as though nothing has happened. Running does not mean fine.
Myth: a two-stroke additive lets you to drive home. It was an old workaround, supposed for another fault. It doesn't put back what petrol has weakened, and the petrol is still in that tank later.
"Drain it yourself and you're sorted" — a myth, because after it has been running some petrol lies in your filter and lines, ready to go right back through the pump at your next start. And, a can of petrol filled at the roadside is genuinely dangerous.
Why petrol in a diesel takes place so easily
It's rarely 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 mostly won't fit a petrol vehicle. That is how the forecourt makes it straightforward.
It takes place when habit and your car stop matching. Courtesy car, hire car, or a car that is brand new. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Racing for a train at Kearsney and fuelling up en route. Years of petrol vehicles behind you, a diesel Volkswagen Tiguan in front of you at the forecourt for its first tank — that is when. With rain, a call coming in, or children to deal with, the hand just does what it always has.
How to avoid petrol in a diesel on your next fill-up in Whitfield
- The label is what counts, and so check the petrol pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- Check the filler flap. Many cars state the fuel type inside the flap or on the cap. Look at it on the first fill in a vehicle you do not know.
- Good intentions count for less than a sticker or a fob in a vivid colour on the diesel's key when a household has one of each. So mark it.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. It sounds daft and it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away and keep your mind on the petrol pump.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to refuse a petrol nozzle, and aftermarket devices exist for the remainder. Treat it as a safety net, then keep reading the pump.
- As soon as you realise, stop: less petrol inside that tank makes a thinner mix. What to do next doesn't change, though — still don't fire it up.
Already put petrol in a diesel in Whitfield?
The order of things is brief, then. Do not switch your ignition on, and do not start it. The attendants at the forecourt — whether at Esso itself or wherever you filled up — will usually help roll it away from the petrol pump if you ask. Next, 0333 366 0103. We'll ask what got in, about how much, and if it has been run.
If it was AdBlue and not petrol, say so. That is a different fault — corrosion and deposits instead of lost protection — and it has its own page for Whitfield.
Whitfield petrol in a diesel tasks: why one costs more than another
Four separate jobs lie behind the four situations above — which is why there's no honest single price. Chiefly, the cost moves with which situation you are in. Two things come after that: the petrol that went in as a share of what your tank holds, then the spot the car is in and whether a van can get to it safely.
Ahead of any quote, not after, we ask three queries: the fuel that got in, its amount, and if it's run. That's why. The answers turn a range into a straight figure.
About Whitfield, for a moment
Whitfield is a village in Kent, situated near the coast and approximately 12.5 miles from Canterbury. Whitfield sits at an elevation of around 130 metres, overlooking the surrounding countryside. Whitfield is characterized by its predominantly detached housing stock, reflecting its rural setting. Whitfield remains a small, residential community with a population of around 1093 people.
Whitfield and Kent: where our fuel drain cover runs
Kearsney, Temple Ewell and Church Whitfield are among the spots around Whitfield that the same vans work, answering petrol in diesel calls across Whitfield's CT postcode area. The car does not need to come to us: our engineers drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
At the petrol pump around Whitfield, right now?
The best position there is, then — that is where you are. Keep it off. Call.