Guilden Sutton: Petrol in a Diesel Car? How Worried to Be
Provided it has not been started, worry far less than you probably are. Petrol sitting in a diesel tank does nothing to the motor until something pulls it through the fuel system — your ignition priming the pump, your starter, or the drive on its own. So the truthful answer to the first question everyone around Guilden Sutton asks, "have I wrecked it?", is usually no. Leave your engine off and ring Petrol in Diesel — that keeps it that way. Keep reading for three things: the effect petrol has inside a diesel motor, the signs of how far it has got, and ways to make sure you don't repeat it.
Inside your engine: what petrol in a diesel really does
Two jobs fall to diesel on its route through a motor. It protects first, and after that does it burn. Made to very fine tolerances, the injectors and your pump depend on the diesel flowing through them to keep their surfaces from wearing against one another.
Poorly at the first, not at all at the second: that is petrol. The clattering comes from petrol being made not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips away the protection the system depends on, and any pump running on that mixture is wearing itself.
Seen together, they make clear what shape the problem takes. Not contact but circulation is what does the harm. All a tank with petrol in it amounts to is a fuel issue. The beginning of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds travels on with the fuel to the fuel injectors downstream.
How serious is petrol in a diesel? Four situations we see in Guilden Sutton
Filled but not once started — as good as it gets. At a forecourt, and really only there, that petrol is still confined to your tank — because anywhere else your car was driven to reach it. The task is emptying and flushing on the spot.
Ignition on, or started for a moment. Once primed, your system has pulled petrol out of that tank as far as your filter and the lines. Still usually straightforward: drain, flush, and the filter seen to.
A few miles driven, and your pump has spent each of them running on diluted fuel. How hard your car was driven matters as much as how far, and this work covers your tank, the fuel lines, the fuel filter and fresh fuel through the whole system. On the school run to Guilden Sutton CofE Primary School, the distance is small. Any distance on the M53, under a mile from Guilden Sutton, means the engine working hard throughout, and a run to Chester, under 3 miles away, makes a very different job as well.
Clattering, an uneven idle, smoke, a throttle gone soft: driven till it complained. The engine is telling you your fuel is no longer acting like diesel. Pull up where you are — on the verge on Summerfield Road, at the kerb, down a side road — and do not move it. Lasting damage is very rare if a vehicle is stopped soon, and the drain and flush that still come first take care of it.
What Guilden Sutton people get told about petrol in a diesel — and the myths in it
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing comes out when you top up — that tank just holds more of the same mixture. That advice supposes a diesel fuel system handles petrol by percentage. It does not.
Not so: a current diesel copes with a bit of petrol. If anything, the reverse. Protection counts more on newer diesels, not less, since their fuel passes through smaller parts at higher pressure.
One myth that catches motorists off guard: if it starts and drives, it must be unharmed. The driver of a petrol motor fed diesel usually stops, because it will not run, and the harm stops with them. While the pump wears, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. Fine and running aren't the same at all.
Myth: "Add some two-stroke oil and drive the car home." It's an old workaround for a different issue. What petrol has diluted remains weakened, and the petrol stays inside your tank anyway.
The next start draws petrol back round your pump from your lines and the fuel filter, where some of it ends up once the motor has run. That is why a DIY tank drain does not sort it — a myth. Clearing petrol into a can by the roadside is also truly hazardous.
Petrol in a diesel: how does it happen?
No one does it on purpose, and it's rarely carelessness. The petrol nozzle is the narrower of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol car at all. The forecourt makes it easy, and the mistake runs one way.
Routine and the car getting out of step is when it takes place. Any motor that's new to you — a hire car, on loan as a courtesy car, or brand new. One petrol and one diesel on the drive of the same household. Your usual forecourt, its pumps now in a different order. A rushed fill en route to Chester with a train to catch. Precisely the moment it happens: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. Add a back seat full of kids, a phone call or rain, and habit wins.
Guilden Sutton people: how to avoid petrol in a diesel next time
- Read the pump, not the colour. In the UK unleaded handles are usually green and diesel black, but not on each forecourt. The label is what matters.
- Many vehicles state the fuel type inside the filler flap or on the cap, and so check there on your first fill in any motor you do not know.
- One of each in the household? Label your key to the diesel — a coloured fob, a sticker — because meaning to remember isn't enough.
- "Diesel", aloud, before you lift the nozzle — each time a new or hired car gets its first tank. It sounds daft. It does the trick.
- Put the phone away. This is an easy mistake to make whilst you are thinking about something else.
- Some diesels have a filler built to refuse a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the pump.
- Less petrol makes a thinner mixture, and so stop the moment you notice — though remembering that the next step is unchanged. It's still not to fire it up.
Guilden Sutton: already put petrol in a diesel?
The order of things is brief, then. Don't start it, and do not switch the ignition on. Ask the attendants to help you push it away from the pump if you're still at the forecourt, whether that is BP or anywhere else. What went in, about how much, and if it's run: tell us those when you phone 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate issue — Guilden Sutton has a page just for it.
What makes one Guilden Sutton petrol in a diesel task cost more than the next
There's no fair single quote for this, because the four scenarios above are four separate jobs. The situation itself does most of the work of moving the cost. Where the vehicle is matters too, and whether our van can safely get to it, after the share of petrol to what your tank takes.
Ahead of any quote, not after, come three queries: the fuel that got in, the quantity, and whether it's run. That's why. Those replies are what change a range into one firm number.
About Guilden Sutton
Guilden Sutton is a small village in Cheshire, situated near the city of Chester and surrounded by other local communities such as Vicarscross and Littleton. Guilden Sutton sits at a relatively low elevation of 33 metres, in an area of gently rolling countryside. Guilden Sutton has a population of around 912 people, with a predominance of detached housing stock. Guilden Sutton is located approximately 2.9 miles from Chester, making it a commuter-friendly location.
Across Cheshire and around Guilden Sutton: fuel drain cover
Our teams answering petrol in diesel calls in Guilden Sutton, in the CH postcode area, also work the spots near it, Vicarscross, Pipers Ash and Littleton among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations we drain, and your vehicle does not need to move to us.
At the pump around Guilden Sutton, still?
The best spot there is, then — that is where you are. Keep the vehicle switched off, then ring.