Should You Worry? Petrol in a Diesel Car in Locking Parklands
Provided it has not been started, worry far less than you probably are. Petrol resting in a diesel tank does nothing to the motor until something draws it through the system — your ignition priming the pump, your starter, or driving on its own. So the honest answer to the first query everyone around Locking Parklands asks, "have I ruined it?", is generally no. Leave your motor off and call Petrol in Diesel — that is how you keep it that way. The rest of this page covers what petrol actually does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
What petrol in a diesel does to the motor
Two jobs fall to diesel on its route through a motor. It ignites, and before it ignites it protects. Very fine clearances are built into the fuel injectors and the high-pressure fuel pump, and just your diesel flowing through keeps those surfaces from grinding together.
The second job petrol does not do at all, and the first it does poorly. The rattling 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 out the lubrication your system hinges on, and any pump running on such a mixture is wearing itself.
Put these together and the shape of the issue is plain. The harm is done by movement, not by contact. Where that petrol is only in the tank, it's a fault of fuel, nothing more. Whatever a worn pump sheds goes on, borne by the fuel, into the fuel injectors downstream, which is why a pump that has worked on that petrol is where a mechanical problem begins.
Petrol in a diesel in Locking Parklands: how bad is it? Four cases
Fuelled, and not started: nothing beats it. The petrol is in that tank and only the tank, and the job is a drain and a flush where the vehicle stands. This is the one scenario that can only really take place on a forecourt, because anywhere else your car has been driven to get there.
Your ignition switched on, or a short start. The fuel system has been bled, and so petrol has left your tank and reached your filter and the fuel lines. Drain, flush, deal with the filter: still usually straightforward.
A few miles driven, and your pump has spent each of them running on weakened fuel. The work is your tank, the fuel lines, the filter and clean fuel through the entire system, and how hard your car was driven matters as much as how far. On the school run to Parklands Educate Together Primary, the miles is small. Any miles on the M5, under a mile from Locking Parklands, means the motor working hard throughout, and a run to Wells, under 15 miles away, makes a very different task too.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone uneven. The motor is telling you the fuel is no longer behaving like diesel. Pull up wherever you are — the verge on Engineers Gardens, a lay-by, a side street — then leave the vehicle there. The drain and flush still come first, and they sort it out: when a car is stopped soon, lasting damage is very rare.
Myths Locking Parklands drivers hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It does not. A bigger tank of the same mixture is all you get, since topping up removes nothing. That guidance supposes a diesel fuel system handles petrol by percentage. It doesn't.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. At higher pressure, through finer parts: that is how a current diesel handles its fuel, so the lubrication counts more, not less.
One myth that catches people out: if it starts and drives, it must be unharmed. Feed diesel to a petrol motor and it generally will not run, and so the driver stops — and the harm stops with them. Feed petrol to a diesel and it usually fires up, idles and drives away like nothing has happened — all while its pump is wearing. Running doesn't mean fine.
An old workaround for a distinct problem lies behind this one. Myth: "Add some two-stroke oil and drive the car home." It doesn't put back what petrol has weakened, and that petrol is still in the tank afterwards.
Once the engine has been run, part of that petrol sits in the filter and your lines, not that tank — and your next start sends it straight back through your pump. So the myth "drain the tank yourself and you're sorted" does not stand up. Also, a can of petrol filled by the kerbside is genuinely risky.
How does petrol in a diesel occur?
On purpose? Never. Through carelessness? Seldom, if ever. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol motor at all. The forecourt makes it easy, and the error runs one way.
The moment habit stops matching your car is the moment it happens. Courtesy car, hire car, or a motor that is brand new. Households running one of each, petrol and diesel. A well-known forecourt with the pumps in a different order. A hurried fill on the way to Worle with a train to catch. Precisely the moment it happens: after years of driving petrol, someone fills a diesel Renault Megane for the first time. Add rain, a phone call or a back seat full of children, and your hand repeats what it has always done.
Next time you fill up around Locking Parklands: preventing petrol in a diesel
- Read the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, but not on every forecourt. The label is what counts.
- In a motor you don't know, look inside the flap over your filler or at the cap before your first fill: many vehicles print the fuel there.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of intending to remember, in a household with one of each.
- Before the nozzle comes off the pump the first time you fill a hired or new motor, say "diesel" aloud. Silly, perhaps, but it works.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck your phone away then keep your mind on the pump.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to refuse a petrol nozzle, and add-on devices are available for vehicles without one. They are a backstop, not a reason to stop reading the petrol pump.
- Less petrol means a weaker mixture, and so stop as soon as you notice — though remembering that the next step is unchanged. It's still not to fire it up.
Put petrol in a diesel in Locking Parklands already?
The order of things is short, then. Leave it unstarted, with the ignition off as well. The attendants at the forecourt — whether at Asda Express itself or wherever you filled up — will usually help push it clear of the petrol pump if you ask. Phone 0333 366 0103 next, with three facts — your fuel, the approximate quantity, and if it has run.
If it was AdBlue instead of petrol, say so. That is a different fault — corrosion and deposits rather than lost protection — and it has its own page for Locking Parklands.
Why one petrol in a diesel job in Locking Parklands costs more than another
An honest single price does not exist here: four situations, four separate jobs. What shifts the cost is mostly which of them you are in. Where the car is counts too, and whether a van can safely reach it, after the proportion of petrol to what that tank takes.
Three queries come first, before any quote, instead of after — what got in, how much, has it run — and this is the reason. A range turns into a straight figure once those answers are in.
About Locking Parklands, for a moment
Locking Parklands is a suburban area located on the riverside in Somerset, with an elevation of around 15 metres. Locking Parklands sits near the towns of Locking and Wells, and is characterized by its semi-detached housing. Locking Parklands is part of the larger network of communities in the South West region, including nearby Elborough and Woolvershill Batch. Locking Parklands has a population of approximately 1702 residents.
Locking Parklands and Somerset: where our fuel drain cover runs
Locking Parklands sits in the BS postcode area, and our teams that answer petrol in diesel calls there work the spots near it as well — Locking, Elborough and Woolvershill Batch among them. You need not move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all places we drain.
In Locking Parklands and still at the petrol pump?
Then you are in the best place there can be. Keep it off. Ring.