Petrol in a Diesel Car in Bampton: How Worried Should You Be?
Less than you likely are, provided it hasn't been started. Till your ignition primes your pump, the starter cranks, or the vehicle is driven, petrol in a diesel tank simply sits there and does no harm. Which means the truthful reply to the first Bampton query — "have I wrecked it?" — normally no. To keep the car like that, ring Petrol in Diesel and leave the motor alone. What petrol really does to a diesel, how to gauge how far it's gone, and how to stop it from happening again: that is the remainder of this page.
What petrol in a diesel does to the motor
Two jobs fall to diesel on its journey through a motor. It protects to begin with, and only then does it burn. Extremely fine tolerances go into your injectors and your high-pressure pump, and just the diesel running through keeps those surfaces from grinding together.
The second job petrol doesn't do at all, and the first it does badly. The rattling comes from petrol being designed 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 the system depends on, and any pump running on such a mix is wearing itself.
Taken together, they make clear the shape the problem takes. It's circulation that causes the damage, not contact. Any tank with petrol in it is a fuel fault. After the pump has been labouring on that petrol, a mechanical fault has started: whatever is shed by a pump that's wearing travels onward to the injectors with the fuel.
How bad is petrol in a diesel? Four situations our technicians see around Bampton
Fuelled up, not once started. The best case there can be. The petrol is in that tank and just your tank, and the task 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 the vehicle has been driven to get there.
A brief spell of running, or merely your ignition on. With the system primed, the fuel lines and filter already contain petrol that has come from your tank. Still usually easy: drain, flush, and the fuel filter dealt with.
Driven a couple of miles. Now your pump has spent these miles running on diluted fuel. Distance is only half of it; how hard it was driven matters just as much. Either way the work runs to that tank, your lines, the filter and clean fuel through the whole system. On the school run to Bampton Church of England Primary School, the distance is short. Getting as far as Exeter, under 25 miles away, makes a very different task — as does any miles on the M5, under 10 miles from Bampton, with the motor working hard all the way.
Knocking, a ragged idle, smoke, a throttle gone soft: driven till it complained. What you are hearing is the motor reporting fuel that no longer acts like diesel. Stop where you are — on the verge on B3227, at the kerb, down a side road — and don't move it. A car stopped soon very seldom has lasting damage, because the drain and the flush-through, which still come first, take care of it.
What Bampton drivers get told about petrol in a diesel — and the myths in it
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing comes out when you top up — the tank simply holds more of the same blend. A diesel fuel system does not accept petrol by percentage in the way that advice supposes.
Myth: a modern diesel copes with a bit of petrol. If anything, the opposite. Finer components and higher pressure are the way a newer diesel runs its fuel, and that makes the protection matter more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that fools motorists. Diesel in a petrol motor generally leaves a motor that won't run: the motorist stops, and so does the damage. While the pump wears, a diesel fed petrol normally starts, idles and drives away as though nothing has happened. Running is not the same as fine.
Myth: "Add some two-stroke oil and drive it home." It is an outdated workaround for a separate issue. What petrol has weakened stays weakened, and that petrol remains in your tank anyway.
Once your engine has been run, part of that petrol is in your filter and the lines, not that tank — and your next start pulls it right back through your pump. So the myth "drain the tank yourself and you are sorted" doesn't stand up. Also, a can of petrol drained by the roadside is truly hazardous.
How does petrol in a diesel take place?
Carelessness is rarely the cause, and nobody means to do it. The petrol nozzle is the slimmer of the two and slips into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol vehicle at all. The forecourt makes it simple, and the slip runs one way.
Habit and your car falling out of step is how it takes place. Any car that's new to you — a hire car, on loan as a courtesy car, or just bought. A household with one petrol and one diesel on the drive. The pumps in a different order on a familiar forecourt. A hurried fill en route to Tiverton Parkway with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Passat in front of you on the forecourt for its first tank — that's when. With rain, a call coming in, or children to deal with, the hand simply does what it has always done.
Bampton motorists: how to avoid petrol in a diesel next time
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most usually do. Read the pump's label; the colour is just a clue.
- Inspect your filler flap. Many vehicles state the fuel inside the flap or on the cap. Look at it on the first fill in a motor you don't know.
- One of each in the household? Mark the key to the diesel — a bright fob, a sticker — because meaning to remember is not enough.
- Before the nozzle comes off the pump the first time you fill a hired or new motor, say "diesel" out loud. Daft, perhaps, but it does the trick.
- Mistakes like this are simple to make while your mind is on something else, so the phone goes away.
- Some diesels come with a filler built to refuse 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 checking the pump.
- Noticing it mid-fill? Stop at once. A weaker mixture results from less petrol inside that tank, yet the next step remains the same: don't start it.
Already put petrol in a diesel in Bampton?
Then the order of things is short. Do not switch the ignition on, and don't crank it. Still at the forecourt, at Murco or anywhere else? Ask the attendants to help you roll it away from the pump. Phone 0333 366 0103 next, with three facts — your fuel, the rough quantity, and if it's run.
Say so if it was AdBlue rather than petrol: it is a different problem, with its own page for Bampton, since AdBlue brings corrosion and deposits rather than lost protection.
What makes one Bampton petrol in a diesel job cost more than the next
The four situations above are four separate tasks, so no single price for this would be fair. What moves the cost is chiefly which of them you're in. After that it is the share — how much petrol got in against how much your tank takes — and then where the car is and whether a technician can reach it safely.
What went in, how much, and whether it's run — three queries our engineers ask before pricing, not after, for exactly that reason. Those replies change a range into a straight figure.
About Bampton, for a moment
Bampton is a village in Devon, situated on the River Batherm, with a mix of semi-detached housing and other types, and is located near the villages of Morebath and Cove. Bampton sits at an elevation of around 104 metres, close to the Exe Valley, and is approximately 18 miles from Exeter. Bampton has a population of around 1294 people, and its riverside setting makes it a notable point in the local landscape. Bampton is also near Shillingford, and is connected to the wider region by road and other transport links.
Fuel drain cover across Devon, Bampton included
The teams answering petrol in diesel call-outs around Bampton, in the EX postcode area, equally work the spots around it, Morebath, Cove and Shillingford among them. The car does not need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the pump around Bampton, still?
Nothing beats it: that's where you are. Leave it turned off, then ring.