Burlish Park: Petrol in a Diesel Car? How Worried to Be
Probably less than you already are — provided nobody has started the car. Till your ignition primes your pump, your starter turns, or your vehicle is driven, petrol in a diesel tank just sits there and does no harm. Which makes the honest reply to the first Burlish Park query — "have I wrecked it?" — usually no. To keep the vehicle like that, ring Petrol in Diesel then leave your engine alone. Further down, you will find what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
Inside the motor: what petrol in a diesel really does
Passing through a motor, diesel does two things at once. It burns, and before it ignites it protects. Very fine clearances go into the injectors and the high-pressure fuel pump, and only your diesel flowing through keeps their surfaces from grinding together.
Of those two tasks, petrol handles the first badly and the second not at all. A pump running on a petrol mix is wearing itself out, since petrol is runnier than diesel and strips out the protection the fuel system relies 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 clattering comes.
The shape of the problem is clear when you put those together. It is circulation that causes the damage, not contact. A tank with petrol in it is a fuel fault. The start of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with your fuel to the fuel injectors downstream.
Petrol in a diesel around Burlish Park: how serious is it? Four situations
The best case there can be: filled up, never started. That petrol is inside the tank and only your tank, and the job is a drain and a flush where the vehicle sits. This is the one situation that can only really happen on a forecourt, as anywhere else your car has been driven to get there.
Ignition on, or started for a moment. The fuel system has been bled, and so petrol has left the tank and reached the fuel filter and your lines. Usually little more than draining, flushing and seeing to the filter, so still straightforward.
Those few miles on the road meant your pump running on fuel diluted by petrol the whole way. Distance is only half of it; how hard it was driven counts equally. Either way this work includes that tank, the fuel lines, the fuel filter and fresh fuel through the whole system. On the school run to Burlish Park Primary School, the mileage is short. Driving as far as Worcester, under 15 miles away, makes a very different task — as does any distance on the M5, under 10 miles from Burlish Park, with your engine labouring hard the whole time.
Driven on till it complained — clattering, smoke, a ragged idle, a soft throttle. The fuel is not behaving like diesel any more, and the engine is saying so. Leave it wherever it stops: a lay-by, a quiet street, the verge on Thirlmere Road. What goes first is still the drain and flush, and that sorts it out, with permanent damage very rare when a vehicle is stopped soon.
What Burlish Park drivers get told about petrol in a diesel — and the myths in it
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 — that tank just carries more of the same mixture. The assumption behind the advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
If anything, the opposite is true. Myth: "A newer diesel can cope with a bit of petrol." A current diesel sends its fuel through more precise parts at higher pressure, which makes the lubrication matter more, not less.
"It starts, it drives, and so no harm done" — the myth that trips up more motorists than any other. The motorist of a petrol engine fed diesel usually has no choice but to stop, since it will not run, and the damage stops there. Whilst the pump grinds, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. Being able to run is not proof of being fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a separate issue. What petrol has diluted stays diluted, and the petrol remains inside that tank anyway.
Myth: "Drain the tank yourself and you're sorted." Once the engine has run, some of that petrol is no longer in the tank: it is in the fuel filter and your lines, and it goes right back through the pump on your next start. Besides, petrol emptied into a can by the road is genuinely dangerous.
How it happens: petrol in a diesel
A careless moment is seldom the cause, and no one means to do it. A diesel nozzle generally will not fit a petrol motor, yet the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error simple, and only in one direction.
Habit and the vehicle getting out of step is when it happens. A car that is new to you — a hire car, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. The pumps in a different order on a familiar forecourt. Rushing for a train outside Kidderminster and fuelling up en route. Exactly the moment it happens: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. Add rain, a phone call or a back seat full of children, and the hand repeats what it has always done.
How to prevent petrol in a diesel at your next fill-up around Burlish Park
- Not every forecourt in the UK follows green for unleaded and black for diesel, even if most generally do. Check the pump's label; the colour is just a hint.
- Many motors state the fuel type inside your filler flap or on the cap, and so check it on your first fill in any motor you do not know.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, for a household with one of each.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you lift 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 and keep your mind on the pump.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to reject a petrol nozzle, and add-on devices exist for cars without one. They are a safety net, not a reason to stop checking the petrol pump.
- Noticing it mid-fill? Stop there and then. A weaker blend results from less petrol in the tank, yet your next stage stays the same: do not fire it up.
Burlish Park: already put petrol in a diesel?
In that case, there is just a short order of things. Starting it is out, and so is turning on the ignition. If you're still at the forecourt — Esso or anywhere else — ask the staff to help you roll the car away from the pump. Phone 0333 366 0103 next, with three facts — your fuel, the rough volume, and whether it has run.
Corrosion and deposits form the issue with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and read its own Burlish Park page.
Why one petrol in a diesel job around Burlish Park costs more than another
The four situations above are four different jobs, so no single quote for this would be fair. Which of them you are in is chiefly what shifts the cost. Two things come after that: the petrol that was put in as a share of what the tank takes, then the place the vehicle is in and whether our van can reach it safely.
What got in, how much, and whether it's run — three questions our engineers ask before quoting, not after, for precisely that reason. Those replies turn a range into a straight figure.
About Burlish Park itself
Burlish Park is a suburban area in Worcestershire, situated near the town of Stourport-on-Severn and the village of Lickhill. Burlish Park lies inland, approximately 11 miles from Worcester, and its elevation is around 45 metres above sea level. Burlish Park is characterised by its predominantly semi-detached housing stock, which reflects the typical residential development of the West Midlands region. Burlish Park is also within commuting distance of larger cities, being around 109 miles from London.
Fuel drain cover around Burlish Park and across Worcestershire
The vans answering petrol in diesel calls in Burlish Park, in the DY postcode area, equally work the places near it, Lickhill, Stourport-on-Severn and Wilden included. No need to bring your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots where we work.
Still at the petrol pump around Burlish Park?
The best spot there is, then — that's where you are. Turned off it remains; then call.