Petrol in a Diesel Car in Conon Bridge: How Worried Should You Be?
Provided it has not been started, you can worry less than you probably are. Until the ignition primes the pump, your starter cranks, or the car is driven, petrol in a diesel tank just sits there and does nothing. Which makes the truthful reply to that first Conon Bridge query — "have I ruined it?" — usually no. Petrol in Diesel is who to phone, with the motor kept off, so it stays that way. Below, you will find what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you again.
Your engine and petrol in a diesel: what goes on
Passing through an engine, diesel is doing two jobs at once. It combusts, and before it ignites it lubricates. What keeps the surfaces inside the high-pressure pump and your injectors from wearing down against one another is your diesel passing through them — they are built to extremely fine clearances.
Badly at the first, not at all at the second: that is petrol. The clattering comes from petrol being designed not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection your system depends on, and any pump running on that mix is wearing itself.
Put those together and the shape of the problem is clear. Not contact but circulation is what does the harm. A tank with petrol in it is a fuel issue. 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 beyond it.
How bad is petrol in a diesel? Four scenarios our engineers see around Conon Bridge
Filled but not once started — as good as it gets. Being on a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With the petrol kept in that tank alone, it is drained and rinsed on the spot, and nothing more is needed.
The ignition switched on, or a brief start. The system has been bled, and so petrol has left that tank and got to the fuel filter and the lines. Drain, flush, see to the fuel filter: still usually straightforward.
A few miles driven, and the pump has spent each of them running on thinned fuel. The work is that tank, your lines, the fuel filter and fresh fuel through the whole circuit, and how hard the car was driven counts as much as how far. A school run to the local primary school is one thing. Any distance on the M90, over 50 miles from Conon Bridge, means the motor working hard throughout, and a run to Inverness, under 10 miles away, makes a very different job as well.
Driven on till it protested — clattering, smoke, a ragged idle, a dead throttle. The fuel isn't behaving like diesel any more, and the motor is saying so. Stop on the spot — on the verge on Riverbank Road, at the kerb, down a side road — and don't move it. What goes first is still the fuel drain and flush, and that takes care of it, with permanent damage very unusual if a car is pulled over quickly.
Conon Bridge motorists and the petrol in a diesel myths they hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Nothing comes out when you top up — that tank just carries more of the same mixture. That advice assumes a diesel fuel system handles petrol by percentage. It doesn't.
Not so: a current diesel copes with a bit of petrol. Rather, the opposite. A current diesel runs its fuel through finer parts at higher pressure, which makes the protection count more, not less.
One myth that catches motorists off guard: if it starts and drives, it must be unharmed. The motorist of a petrol engine fed diesel usually stops, because it will not run, and the harm stops with them. While the pump grinds, a diesel fed petrol usually starts, idles and drives away as though nothing has happened. Running does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct fault. What petrol has diluted stays thinned, and that petrol remains in that tank regardless.
If the engine has been run, part of that petrol is in your filter and your lines, not the tank — and the next start sends it straight back through the pump. So the myth "drain that tank yourself and you're sorted" does not hold. And, a can of petrol filled at the roadside is truly dangerous.
Petrol in a diesel: how does it happen?
Carelessness is rarely the cause, and no one means to do it. A diesel nozzle generally 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 simple, and just in that direction.
The moment habit stops matching your car is the moment it occurs. Hire cars, courtesy cars, and cars that are new to you. Two motors on one drive, one petrol, one diesel. Your normal forecourt, its pumps suddenly in a different order. Rushing for a train outside the nearest station and filling up en route. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver used to petrol: precisely when it happens. With rain, a call coming in, or children to deal with, your hand simply does what it has always done.
Next time you fill up around Conon Bridge: preventing petrol in a diesel
- Check the pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on every forecourt. The label is what counts.
- In a motor you do not know, look inside the flap over your filler or at the cap before your first fill: plenty of vehicles state the fuel type there.
- Mark your key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- 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 seems daft and it works.
- Mistakes like this are simple to make while your mind is on something else, so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to reject a petrol nozzle, and add-on devices are available for cars without one. They are a backstop, not a reason to stop reading the pump.
- Spotting it mid-fill? Stop there and then. A thinner mixture results from less petrol in your tank, but your next stage remains the same: do not crank it.
Already put petrol in a diesel in Conon Bridge?
Then the order of things is brief. Leave it unstarted, with your ignition switched off too. Still on the forecourt, at Tesco or anywhere else? Ask the staff to help you roll the car clear of the petrol pump. Next, 0333 366 0103. We will ask what was put in, roughly how much, and if it's been run.
Corrosion and deposits form the problem with AdBlue, whereas petrol means lost protection. So if it was AdBlue, say so — and see its own Conon Bridge page.
What makes one Conon Bridge petrol in a diesel task cost more than the next
The four situations above are four separate jobs, so no single price for this would be fair. The scenario itself does most of the work of moving the cost. Two things come after that: the petrol that got in as a share of what the tank takes, then the place your car is in and whether our van can get to it safely.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and that is the reason. With those replies, you get a straight figure instead of a range.
About Conon Bridge itself
Conon Bridge is a coastal village in the Scottish Highlands, situated near the mouth of the River Conon and close to the city of Inverness. Conon Bridge has a population of around 1140 people and is characterized by its semi-detached housing stock. Conon Bridge sits at a low elevation of 6 metres above sea level, looking out over the Moray Firth. Conon Bridge is located near other small communities such as Maryburgh and Corntown.
Fuel drain cover across Highland, Conon Bridge included
Petrol in diesel calls in Conon Bridge — part of the IV postcode area — go to vans that likewise cover the places about it, Maryburgh, Corntown and Ryefield among them. Our technicians drain wherever your vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Still at the pump in Conon Bridge?
No position is better: that's where you now are. Call, and keep it switched off.