Petrol in a Diesel Car in New Westwood: How Worried Should You Be?
Provided it has not been started, worry less than you probably are. Everyone in New Westwood begins with "have I ruined it?", and the fair answer is usually no: petrol resting in the tank of a diesel stays harmless till priming, cranking or driving draws it into your fuel system. Petrol in Diesel is who to call, with the engine left off, and so it stays that way. Read on for three things: the effect petrol has inside a diesel motor, the signs of how far it has got, and the way to make sure you never do it again.
The motor and petrol in a diesel: what goes on
Two tasks fall to diesel on its route round a motor. It protects to begin with, and only then does it burn. What keeps the surfaces inside the high-pressure pump and your injectors from wearing against one another is the diesel flowing through them — they're made to very fine tolerances.
Of these two jobs, petrol handles the first badly and the second never. A pump running on a petrol blend is wearing itself out, because petrol is thinner than diesel and takes away the protection the fuel system depends on. Petrol is also made to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where the knocking comes.
Seen together, they make clear what shape the trouble has. Not contact but movement is what causes the damage. A tank with petrol in it is a fuel issue. Once your pump has been running on that petrol, a mechanical problem has started: anything shed by a pump that is wearing down is carried onward to the injectors with the fuel.
How serious is petrol in a diesel? Four scenarios our engineers see in New Westwood
The best case there can be: filled up, never started. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With that petrol kept in your tank alone, it is drained and rinsed right where it stands, and nothing more is needed.
Started for a moment, or only your ignition on. Petrol has come out of that tank and got to your filter and your lines, since the system has been primed. Drain, flush, see to the fuel filter: still usually simple.
Those few miles driven meant your pump labouring on fuel thinned by petrol the whole way. How hard your car was driven counts as much as how far, and the work covers your tank, the fuel lines, the filter and fresh fuel through the entire circuit. Driving the kids to Westwood Infant and Nursery School is one sort of trip. Any mileage on the M1, under 3 miles from New Westwood, means the motor has worked hard throughout, and a run to Nottingham, under 15 miles away, makes a very different job as well.
Knocking, a lumpy idle, smoke, a throttle gone soft: driven till it complained. That is your engine telling you its fuel no longer is acting like diesel. Leave it where it has stopped: a lay-by, a side street, the verge on New Westwood. A car pulled over quickly very seldom has lasting damage, since the fuel drain and the flush-through, which still go first, sort it out.
New Westwood drivers and the petrol in a diesel myths they hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Nothing is removed when you top up — that tank simply carries more of the same mixture. Percentage isn't how a diesel fuel system copes with petrol, however much that guidance supposes.
"Newer diesels can handle a little petrol" — a myth, and nearer the reverse. A newer diesel runs its fuel through more precise parts at higher pressure, which makes the protection count more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there's no harm done." Feed diesel to a petrol engine and it normally will not run, so the driver stops — and the damage stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile your pump wears. Being able to run isn't the same as being fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a different issue. It doesn't put back what petrol has weakened, and that petrol is still inside your tank later on.
"Drain it yourself and you are sorted" — a myth, because after it has been running some petrol sits in the filter and lines, ready to go straight back through the pump at your next start. It's also truly risky to drain petrol into a can at the roadside.
Petrol in a diesel: how does it occur?
On purpose? Never. Through carelessness? Seldom, if ever. The petrol nozzle is the narrower of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol motor at all. The forecourt makes it simple, and the mistake runs one way.
The moment routine stops matching the vehicle is the moment it happens. A new motor, a hire car or a courtesy car. Households running one of each, petrol and diesel. A forecourt you know, only with its pumps arranged differently. A hurried fill on the way to Langley Mill with a train to catch. Years of petrol vehicles behind you, a diesel Renault Megane in front of you at the forecourt for its first tank — that is when. With rain, a call arriving, or a car full of children to deal with, the hand simply does what it always has.
Preventing petrol in a diesel next time you fill up around New Westwood
- A green handle for unleaded and black for diesel is usual in the UK — yet not on each forecourt. Trust the label on the petrol pump, not the colour.
- Inspect your filler flap. Many vehicles state the fuel type inside the flap or on the cap. Look at it on the first fill in a car you do not know.
- Mark your key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It seems daft. It works.
- Put your phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels have a filler built to reject a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the pump.
- Spotting it mid-fill? Stop there and then. A thinner mixture results from less petrol in your tank, but the next step stays the same: don't crank it.
Put petrol in a diesel in New Westwood already?
Short and simple, then, is the order of things. Do not switch the ignition on, and don't fire it up. If you're still at the forecourt — BP or anywhere else — ask the staff to help you push the car away from the petrol pump. What was put in, about how much, and if it has run: tell us those when you ring 0333 366 0103.
Corrosion and deposits are the problem with AdBlue, whereas petrol means lost protection. So if it was AdBlue, say so — and see its own New Westwood page.
Why one petrol in a diesel job in New Westwood costs more than another
Four different tasks sit behind the four situations above — which is why there is no fair single price. The situation itself does most of the work of moving the cost. Two things come after that: the petrol that went in as a proportion of what the tank holds, then the spot your car is in and whether a technician can get to it safely.
Three questions come first, before any quote, rather than after — what got in, how much, has it run — and this is the reason. A range becomes a straight figure once those answers are in.
About New Westwood itself
New Westwood is a suburban area situated on the riverside in Nottinghamshire, with an elevation of around 89 metres. New Westwood lies approximately 10 miles south of Nottingham and 119 miles north of London, near the communities of Westwood and Barrows Green. New Westwood has a population of around 1129 people, predominantly living in semi-detached housing. New Westwood forms part of the wider Nottingham urban area, with nearby places including Toadhole.
Fuel drain cover in New Westwood and across Nottinghamshire
Westwood, Barrows Green and Toadhole are among the spots around New Westwood that the same vans work, answering petrol in diesel calls across New Westwood's NG postcode area. Our technicians drain where your car is — your own drive, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
At the pump in New Westwood, still?
The best position there is, then — that is where you are. Switched off it stays; then call.