How Worried Should You Be? Petrol in a Diesel Car in West Hill
Likely less than you already are — as long as no one has started it. "Have I wrecked it?" is the first thing everyone in West Hill asks, and the truthful answer is generally no, since petrol left in a diesel tank harms nothing until it's dragged through your fuel system — by ignition priming, by the starter, or by driving. To leave the vehicle that way, ring Petrol in Diesel then leave your engine switched off. Read on for three things: the effect petrol has inside a diesel engine, the signs of how far it has spread, and the way to make sure you never do it again.
Petrol in a diesel: what does it do to the motor?
On its way through a motor, diesel has two tasks. Before it combusts, it protects — then it ignites. Made to very fine gaps, the injectors and the pump depend on your diesel moving through them to stop their surfaces wearing against one another.
Badly at the first, not at all at the second: that's petrol. A pump running on a petrol mixture is wearing itself out, because petrol is thinner than diesel and takes away the lubrication the fuel system depends on. Petrol is also made to resist igniting under compression — the opposite of what a diesel needs from its fuel — and that's where any clattering comes.
Taken together, they make clear the shape the issue has. Contact doesn't do the damage — circulation does. Petrol in a tank is a fuel problem. 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 injectors beyond it.
Petrol in a diesel around West Hill: how bad is it? Four situations
Fuelled up, never started. The best case there can be. That petrol is in the tank and only that tank, and the task is a drain and a flush where the car sits. This is the one situation that can only truly take place on a forecourt, because anywhere else your car has been driven to get there.
The ignition turned on, or a short start. Your system has been bled, so petrol has left your tank and got to your filter and the fuel lines. That is generally still a simple job — a drain, a flush, and your filter seen to.
Some miles driven, and the pump has spent every one of them working on diluted fuel. The work is your tank, your lines, your filter and clean fuel through the whole system, and how hard the vehicle was driven counts as much as how far. Short trips, like the school run to Our Lady and St Peter Catholic Primary School A Catholic Voluntary Academy, are one matter. Any mileage on the M62, under 50 miles from West Hill, means the motor working hard throughout, and a run to Kingston upon Hull, under 25 miles away, is a very different task too.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone lumpy. The motor is telling you the fuel is no longer behaving like diesel. Pull up wherever you are — the verge on Cornfield Crescent, a lay-by, a side street — and leave the vehicle there. What comes first is still the fuel drain and flush, and that sorts it out, with long-term damage very rare if a vehicle is stopped soon.
What West Hill 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. A fuller tank of the same mixture is all you get, since topping up takes out nothing. That guidance assumes a diesel fuel system handles petrol by percentage. It does not.
"Modern diesels can handle a little petrol" — a myth, and closer to the reverse. A newer diesel sends its fuel through finer components at higher pressure, which makes the lubrication count more, not less.
The myth that catches motorists off guard: if it starts and drives, it must be unharmed. The driver of a petrol engine fed diesel normally stops, because it will not run, and the damage stops with them. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, whilst the pump wears. Running does not mean fine.
An old workaround for a distinct problem is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." The petrol is still in the tank afterwards, and what it has weakened isn't put back.
The next start draws petrol back round your pump from the fuel lines and the fuel filter, where some of that sits after the engine has been run. That is why draining the tank yourself doesn't leave you sorted — a myth. It's also genuinely hazardous to drain petrol into a can by the kerbside.
How it happens: petrol in a diesel
A careless moment is rarely the cause, and no one means to do it. The petrol nozzle is the narrower of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol vehicle at all. The forecourt makes it simple, and the error runs one way.
It occurs when routine and the vehicle stop matching. A new vehicle, a hire car or a courtesy car. Two cars on one drive, one petrol, one diesel. A forecourt you know, only with its pumps laid out differently. A train to catch, and a rushed fill en route to Bridlington. A new-to-you diesel Skoda Octavia, its first fuelling, and a driver used to petrol: precisely when it happens. Throw in rain, a phone call or a back seat full of kids, and the hand does what it has always done.
West Hill drivers: how to prevent petrol in a diesel next time
- Not every forecourt in the UK follows green for unleaded and black for diesel, even if most generally do. Check the pump's label; the colour is just a clue.
- The first fill in an unfamiliar car is the time to check the filler flap — inside it, or on the cap, plenty of vehicles state the fuel they take.
- Good intentions count for less than a sticker or a fob in a vivid colour on the diesel's key when a household has one of each. So label it.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump. It seems silly and it does the trick.
- Put your phone away. This is an easy mistake to make whilst you are thinking about something else.
- Some diesels come with 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 reading the petrol pump.
- Noticing it halfway? Stop at once. A thinner mix follows from less petrol in that tank, yet the next stage remains the same: do not start the vehicle.
West Hill: already put petrol in a diesel?
The order of things is short, then. Don't turn the ignition on, and don't start it. If you are still at the forecourt — Morrisons or anywhere else — ask the attendants to help you roll the car clear of the pump. Call 0333 366 0103 next, with three answers — the fuel, the rough quantity, and if it has run.
If it was AdBlue instead of petrol, say so. That is a different issue — corrosion and deposits and not lost lubrication — and it has its own page for West Hill.
One petrol in a diesel job in West Hill costs more than another. Why?
The four scenarios above are four separate tasks, so no single price for this would be fair. What shifts the cost is mostly which of them you're in. Two things come after that: the petrol that got in as a proportion of what your tank holds, then the spot the car is in and whether a technician can reach it safely.
Before any quote, not after, we ask three queries: your fuel that got in, its volume, and whether it's run. That's why. With the answers, there is a straight figure rather than a range.
About West Hill
West Hill is a suburban area in the East Riding of Yorkshire, situated near the coast and approximately 18 metres above sea level. West Hill lies within commuting distance of Kingston upon Hull, which is about 24 miles away, and is close to nearby places such as Bessingby and Hilderthorpe. West Hill has a population of around 3247 people and predominantly features terraced housing.
Across East Riding of Yorkshire and in West Hill: fuel drain cover
Petrol in diesel call-outs around West Hill — part of the YO postcode area — go to vans that likewise cover the locations around it, Bessingby, Hilderthorpe and Old Town included. You need not bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all spots we drain.
In West Hill and still at the pump?
Nothing beats it: that's where you are. Call, and leave it turned off.