How Worried Should You Be? Petrol in a Diesel Car in Briery Hill
Less than you probably are, if it hasn't been started. "Have I ruined it?" is the first thing anyone around Briery Hill asks, and the truthful answer is normally no, because petrol left in a diesel tank hurts nothing till it is drawn through the system — by ignition priming, by the starter, or by driving. To leave the vehicle that way, phone Petrol in Diesel and leave your motor alone. What petrol actually does to a diesel, how to judge how far it's gone, and how to stop it from happening again: that is the rest of this page.
Petrol in a diesel: what does it do to the motor?
On its way through a motor, diesel does two tasks. Before it ignites, it protects — then it combusts. Extremely fine tolerances are built into the fuel injectors and the high-pressure fuel pump, and just your diesel flowing through stops their surfaces grinding together.
Of those two tasks, petrol handles the first poorly and the second never. The rattling comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips away the lubrication your system hinges on, and any pump working on such a mix is wearing itself.
Taken together, they make clear what shape the problem takes. Contact does not do the harm — circulation does. All a tank with petrol in it amounts to is a fuel problem. After the pump has been working on that petrol, a mechanical issue has started: whatever is shed by a pump that is wearing travels onward to the fuel injectors with your fuel.
Four scenarios our engineers see in Briery Hill: how bad is petrol in a diesel?
Fuelled, and never started: no case is better. Just the tank has petrol in it, so the job is clearing the tank and cleaning the system where the vehicle stands. This scenario can only really happen on a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or just your ignition on. Petrol has come out of the tank and got to the filter and the fuel lines, because the fuel system has been bled. Drain, flush, see to the fuel filter: still normally straightforward.
Driven a few miles. Now your pump has spent those miles working on thinned fuel. Tank, lines, filter, then clean fuel run through the whole circuit: that is this work, and the way your car was driven matters as much as the mileage. The school run to the local primary school is one matter. Any miles on the M4, under 15 miles from Briery Hill, means the motor has worked hard throughout, and a run to Newport, under 25 miles away, is a very different job as well.
Driven on till it protested — clattering, smoke, a lumpy idle, a dead throttle. The fuel isn't acting like diesel any more, and the motor is saying so. Whether it's the verge on Institution Terrace, a lay-by or a side road, stop there and leave it. The fuel drain and flush still go first, and they sort it out: if a car is stopped soon, permanent damage is very rare.
What Briery Hill people get told about petrol in a diesel — and the myths in it
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — your tank simply holds more of the same mixture. The assumption behind that advice — that diesel fuel systems accept petrol by percentage — is wrong.
"Current diesels can handle a little petrol" — a myth, and closer to the reverse. At higher pressure, through finer parts: that is how a current diesel handles its fuel, so the protection counts for more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there is no damage done." Diesel in a petrol motor usually means a motor that will not run: the motorist stops, and so does the harm. A diesel fed petrol usually starts, idles and drives away as if nothing has happened, while your pump wears. Being able to run is not the same as being fine.
Myth: a two-stroke additive lets you to drive home. It was an old fix, meant for another problem. That petrol is still inside that tank after that, and whatever it has thinned isn't put back.
Myth: "Drain your tank yourself and you are sorted." Once your engine has run, some of the petrol is no longer inside the tank: it is in the filter and your lines, and it goes straight back through the pump on your next start. It is also truly dangerous to drain petrol into a can by the kerbside.
How petrol ends up: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. A diesel nozzle mostly won't fit a petrol vehicle, but the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error easy, and only in one direction.
When routine and the car stop matching, it takes place. Hire cars, courtesy cars, and cars that are new to you. One petrol and one diesel on the driveway of the same household. A familiar forecourt with the pumps in a different order. Racing for a train at Ebbw Vale Town and filling up en route. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver accustomed to petrol: precisely when it happens. Throw in rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Briery Hill motorists: how to prevent petrol in a diesel next time
- The label is what counts, and so read the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on each forecourt.
- Many motors state the fuel type inside the filler flap or on the cap, and so check it on your first fill in a vehicle you do not know.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key if a home 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" aloud before you lift the nozzle off the pump. It seems daft and it works.
- Mistakes like this are simple to make while your mind is on something else, so your phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to refuse a petrol nozzle, and add-on devices are available for cars without one. They are a safety net, not a reason to stop checking the petrol pump.
- Noticing it mid-fill? Stop at once. A thinner mixture results from less petrol in that tank, yet your next step remains the same: do not start the car.
Already put petrol in a diesel in Briery Hill?
Short and simple, then, is the order of things. Don't switch the ignition on, and do not fire it up. If you are still at the forecourt — Gulf or anywhere else — ask the attendants to help you push the car clear of the pump. Then call 0333 366 0103 and tell us what got in, roughly how much, and whether it's run.
Corrosion and deposits are the issue with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and see its own Briery Hill page.
Why one petrol in a diesel task around Briery Hill costs more than another
The four situations above are four different jobs, so no single quote for this would be honest. Chiefly, the cost shifts with which situation you're in. Two things follow that: the petrol that got in as a proportion of what the tank holds, then the place your car is in and whether our van can reach it safely.
What got in, how much, and whether it has run — three questions we ask before pricing, not after, for exactly that reason. A range becomes a straight figure once the replies are in.
About Briery Hill and its setting
Briery Hill is a suburban area situated on the riverside in Blaenau Gwent, with a mix of terraced housing and a population of around 1580 residents. Briery Hill sits at an elevation of 341 metres, overlooking the surrounding landscape. Briery Hill is located near other suburban areas such as Ty Llwyn, Hilltop, and Garden City, and is approximately 15.6 miles from Newport.
Briery Hill and Blaenau Gwent: where our fuel drain cover runs
Ty Llwyn, Hilltop and Garden City are among the places around Briery Hill that the same vans work, answering petrol in diesel jobs across Briery Hill's NP postcode area. The car does not need to move to us: we drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the petrol pump around Briery Hill, still?
No position is better: that's where you now are. Phone, and leave it switched off.