Should You Worry? Petrol in a Diesel Car in Harlescott
Provided it has not been started, you can worry less than you probably are. Petrol sitting in a diesel tank does nothing to the engine till something draws it through the system — the ignition priming the pump, the starter, or driving on its own. So the honest answer to the first query everyone in Harlescott asks, "have I ruined it?", is normally no. Keep it that way: leave your engine off and call Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it has gone, and how to keep it from happening a second time: that's the rest of this page.
The engine and petrol in a diesel: what happens
Passing through an engine, diesel does two jobs at once. Oiling comes before burning; it does both. Designed to extremely fine tolerances, your injectors and the pump depend on the diesel moving through them to stop their surfaces wearing against one another.
Poorly at the first, not at all at the second: that's petrol. Being less viscous than diesel, petrol strips out the protection a fuel system needs, leaving a pump on that mixture to wear itself. It is equally made to resist igniting under compression — the opposite of what a diesel needs — which is why you get the clattering.
Taken together, they show what shape the issue has. The harm is done by circulation, not by contact. Any tank with petrol in it is a fuel problem. A pump that has been working on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with the fuel to the fuel injectors further on.
How serious is petrol in a diesel? Four scenarios we see around Harlescott
The best case there can be: filled up, never started. Just the tank has petrol in it, and so the task is clearing your tank and flushing the system where your car sits. This scenario can only truly occur on a forecourt: anywhere else, the car got there by being driven.
Ignition on, or started for a moment. The system has been primed, so petrol has left that tank and reached your filter and the fuel lines. Drain, flush, see to the fuel filter: still usually easy.
The pump has spent a few miles on weakened fuel — that's what driving it does. Tank, lines, filter, then fresh fuel put through the entire system: that is the work, and the way the car was driven counts as much as the mileage. Driving the kids to Sundorne Infant School and Nursery is one kind of trip. A run as far as Wrexham, under 25 miles away, is a very different job. So is any mileage on the M54, under 10 miles from Harlescott, where the engine has been running hard throughout.
Driven until it complained. Rattling, an uneven idle, smoke, a throttle that has gone soft. The fuel is not acting like diesel any more, and the engine is telling you. Whether it is the verge on Whitchurch Road, a lay-by or a side street, stop there then leave it. What comes first is still the fuel drain and flush, and that takes care of it, with lasting damage very uncommon if a car is stopped soon.
Stories Harlescott motorists hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It doesn't. A fuller tank of the same mix is all it gives, because topping up removes nothing. Percentage is not how a diesel fuel system tolerates petrol, however much that advice supposes.
"Modern diesels can handle a little petrol" — a myth, and nearer the opposite. At higher pressure, through more precise parts: that is how a modern diesel moves its fuel, so the protection counts more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there is no harm done." A petrol engine fed diesel usually won't run, and so the motorist stops and the harm stops with them. Whilst your pump grinds, a diesel fed petrol normally starts, idles and drives away as if nothing has happened. Running doesn't mean fine.
An old workaround for a distinct problem lies behind this one. Myth: "Add some two-stroke oil and drive it home." That petrol is still in that tank after that, and what it has weakened isn't put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol sits in the filter and lines, ready to go right back through your pump at your next start. Also, a can of petrol drained at the kerbside is truly hazardous.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Rarely, if ever. The forecourt makes it simple: the petrol nozzle is the slimmer of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol motor at all. So the slip runs one way.
It occurs when habit and the car stop matching. A motor that's new to you — a hire car, on loan as a courtesy car, or just bought. Two motors on one drive, one petrol, one diesel. A well-known forecourt with the pumps in a different order. A hurried fill en route to Shrewsbury 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. Throw in rain, a phone call or a back seat full of kids, and the hand repeats what it has always done.
How to avoid petrol in a diesel on your next fill-up around Harlescott
- A green handle for unleaded and black for diesel is usual in the UK — yet not on each forecourt. Trust the label on the pump, not the colour.
- In a car you do not know, look inside the flap over the filler or at the cap before the first fill: many cars state the fuel type there.
- Good intentions do less than a sticker or a fob in a bright colour on the diesel's key if a household has one of each. So label it.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the petrol pump. It sounds silly and it works.
- 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 petrol pump.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices are available for motors without one. They are a backstop, not a reason to stop checking the petrol pump.
- Stop the moment you realise. Less petrol in that tank makes a thinner mix. It does not change what to do next, which is still not to fire it up.
Put petrol in a diesel in Harlescott already?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition off too. Still at the forecourt, at Tesco or anywhere else? Ask the attendants to help you push the vehicle clear of the pump. Next, 0333 366 0103. We will ask what got in, roughly how much, and if it's been run.
Corrosion and deposits are the issue with AdBlue, whereas petrol brings lost lubrication. So if it was AdBlue, say so — and read its own Harlescott page.
What makes one Harlescott petrol in a diesel job cost more than the next
A fair single quote doesn't exist here: four situations, four separate tasks. What shifts the cost is mostly which of them you are in. Beyond that it is the proportion — how much petrol went in against how much the tank holds — and after that where the vehicle is and whether our van can get to it safely.
That is why our engineers ask three queries before quoting rather than after: what got in, how much, and whether it has run. With those answers, you get a straight figure instead of a range.
About Harlescott and its setting
Harlescott is a suburban area in Shropshire, situated inland at an elevation of 69 metres, with semi-detached housing being the predominant type of accommodation. Harlescott lies near several other local suburbs, including Sundorne, Heathgates, and Battlefield, and is located approximately 24 miles from Wrexham. Harlescott is home to around 5038 residents and is part of the wider West Midlands region. Harlescott is also relatively distant from London, being around 139 miles away.
Fuel drain cover across Shropshire, Harlescott included
The vans answering petrol in diesel calls around Harlescott, in the SY postcode area, equally work the spots near it, Sundorne, Heathgates and Battlefield included. The vehicle does not need to move to us: our engineers drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Harlescott: still at the petrol pump?
In that case, you couldn't be in a better place. Phone, and keep it switched off.