Should You Worry? Petrol in a Diesel Car in Sevenoaks Common
Probably less than you already are — provided nobody has started the vehicle. Petrol sitting in a diesel tank does nothing to the motor until something draws it through the system — the ignition priming your pump, your starter, or the drive itself. So the truthful answer to the first query anyone in Sevenoaks Common asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to phone, with the motor left off, so it remains that way. The remainder of this page sets out what petrol really does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
The engine and petrol in a diesel: what goes on
Diesel does two tasks on its way through an engine. Before it ignites, it protects — and then it burns. What keeps the surfaces inside the high-pressure fuel pump and the injectors from grinding against one another is the diesel passing through them — they are built to very fine clearances.
Of those two tasks, petrol handles the first poorly and the second not at all. A pump working on a petrol mix is wearing itself out, since petrol is runnier than diesel and strips out the lubrication the fuel system relies on. Petrol is also made to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that is where any clattering starts.
Together, those make the shape of the trouble clear. The damage is done by movement, not by contact. Where that petrol is only in the tank, it's a fault of fuel, nothing more. The start of a mechanical one is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with your fuel to the fuel injectors beyond it.
Sevenoaks Common, petrol in a diesel: four cases, from mild to major
Filled up, not once started. The best case there is. That petrol is in that tank and only the tank, and the job is a drain and a flush where your car sits. This is the one scenario that can only truly take place on a forecourt, since anywhere else the vehicle has been driven to get there.
A brief spell of running, or merely your ignition on. Petrol has left that tank and got to your filter and the lines, since your system has been bled. That is usually still a simple task — a drain, a flush, and the fuel filter dealt with.
Driven a couple of miles. Now the pump has spent those miles running on diluted fuel. How hard your car was driven matters as much as how far, and this work takes in your tank, your lines, the filter and clean fuel through the entire system. Driving the children to St Thomas' Catholic Primary School, Sevenoaks is one sort of trip. Any mileage on the M25, under 3 miles from Sevenoaks Common, means your engine has worked hard throughout, and a run to London, under 25 miles away, is a very different task as well.
Rattling, a lumpy idle, smoke, a throttle gone soft: driven till it complained. That is the engine telling you its fuel no longer is acting like diesel. Pull up wherever you are — the verge on Ashgrove Road, a lay-by, a side street — and leave the vehicle there. Long-term damage is very unusual when a car is stopped early, and the fuel drain and flush-through that still go first take care of it.
Petrol in a diesel stories Sevenoaks Common motorists hear
False: topping up to full with diesel makes it fine. It does not. Nothing comes out when you top up — your tank simply carries more of the same mixture. Percentage isn't how a diesel fuel system copes with petrol, whatever that guidance presumes.
Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. Lubrication counts more on current diesels, not less, since their fuel runs through smaller components at higher pressure.
One myth that catches drivers out: if it starts and drives, it must be unharmed. Feed diesel to a petrol engine and it generally will not run, so the motorist stops — and the harm stops with them. A diesel fed petrol normally starts, ticks over and drives away as if nothing has happened, whilst your pump grinds. A running engine doesn't mean fine.
Myth: "Add some two-stroke oil and drive it home." It's an outdated workaround for a separate fault. None of what petrol thinned gets put back by it — and afterwards, that tank still contains that petrol.
Myth: "Drain the tank yourself and you're sorted." After your engine has run, some of the petrol is no longer in the tank: it is in the fuel filter and the lines, and it goes right back through the pump at the next start. Clearing petrol into a can by the roadside is also genuinely hazardous.
Petrol in a diesel: how does it happen?
On purpose? Never. Through carelessness? Seldom, if ever. A diesel nozzle mostly will not go into a petrol motor, yet the slimmer petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error straightforward, and just in that direction.
The moment habit stops matching the car is the moment it occurs. Hire cars, courtesy cars, and vehicles that are new to you. Two vehicles on one driveway, one petrol, one diesel. The pumps in a different order on a well-known forecourt. A rushed fill en route to Sevenoaks with a train to catch. A new-to-you diesel Volkswagen Passat, its first fuelling, and a driver used to petrol: precisely when it happens. Add a back seat full of children, a phone call or rain, and habit wins.
Sevenoaks Common people: how to prevent petrol in a diesel next time
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Check the petrol pump's label; the colour is only a clue.
- In a motor you do not know, look inside the flap over the filler or at the cap before your first fill: plenty of motors print the fuel type there.
- Good intentions count for less than a sticker or a fob in a bright colour on the diesel's key when a house has one of each. So label it.
- Before the nozzle leaves the petrol pump the first time you fill a hired or new vehicle, say "diesel" out loud. Daft, yes, yet it works.
- Whilst you're thinking about something else, this is an easy mistake to make — so put the phone away.
- Add-on devices exist for motors without one, and some diesels are built with a filler that won't accept a petrol nozzle. Useful — but a safety net at best, never a reason to stop checking the label.
- Less petrol means a weaker mixture, so stop the moment you realise — though remembering that your next step is unchanged. It's still not to fire it up.
Already put petrol in a diesel in Sevenoaks Common?
Short and simple, then, is the order of things. Do not crank it, and do not switch your ignition on. The staff at the forecourt — whether at Shell itself or wherever you filled up — will normally help push it clear of the petrol pump if you ask. Ring 0333 366 0103 next, with three answers — the fuel, the rough volume, and if it has run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different fault — Sevenoaks Common has a page just for it.
One petrol in a diesel task around Sevenoaks Common costs more than another. Why?
There is no honest single quote for this, because the four situations above are four different tasks. What shifts the cost is mostly which of them you're in. The ratio counts next, meaning how much of that tank is petrol, and then the location of the car and whether getting to it is safe for a technician.
Ahead of any quote, not after, come three queries: the fuel that went in, the amount, and if it has run. That's why. A range becomes a straight figure once the replies are in.
About Sevenoaks Common
Sevenoaks Common is a suburban area in Kent, situated inland at an elevation of 191 metres, and is located approximately 22 miles from London. Sevenoaks Common is characterized by its predominantly detached housing stock and is near several local landmarks, including Hubbards Hill and Fig Street. Sevenoaks Common sits in a wooded area, with nearby Bayleys Hill and other scenic spots. Sevenoaks Common has a population of around 1376 residents.
Across Kent and around Sevenoaks Common: fuel drain cover
The vans answering petrol in diesel call-outs in Sevenoaks Common, in the TN postcode area, also work the places near it, Hubbards Hill, Fig Street and Bayleys Hill among them. The vehicle doesn't need to move to us: we drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Sevenoaks Common: still at the pump?
Then you're in the best spot there can be. Keep it off. Call.