Petrol in a Diesel Car in Kewstoke: How Worried Should You Be?
If it hasn't been started, you can worry far less than you probably are. Until the ignition primes the pump, the starter cranks, or the vehicle is driven, petrol in a diesel tank simply rests there and does no harm. Which means the honest reply to that first Kewstoke question — "have I ruined it?" — usually no. Leave your engine off and phone Petrol in Diesel — that keeps it like that. What petrol actually does to a diesel, how to gauge how far it's travelled, and how to stop it from happening a second time: that's the remainder of this page.
Your engine and petrol in a diesel: what happens
Passing through an engine, diesel is doing two things at once. It lubricates first, and only then does it burn. Built to extremely fine clearances, the fuel injectors and your pump rely on the diesel flowing through them to stop their surfaces wearing against one another.
Petrol does the first job 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 protection the fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where any clattering comes.
Taken together, they show what shape the trouble takes. Not contact but movement is what causes the damage. Where that petrol is only inside that tank, it is a fault of fuel, nothing more. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors downstream.
Kewstoke, petrol in a diesel: four cases, from mild to serious
Filled but never started — as good as it gets. Only that tank has petrol in it, so the job is emptying that tank and purging your system where the car stands. This scenario can only truly take place on a forecourt: anywhere else, your car got there by being driven.
A brief spell of running, or merely your ignition on. With the system primed, your lines and filter already contain petrol that came from that tank. Drain, flush, see to the fuel filter: still usually straightforward.
Those few miles driven meant your pump labouring on fuel diluted by petrol throughout. How hard the vehicle was driven matters as much as how far, and the work covers your tank, your lines, your filter and clean fuel through the entire circuit. On the school run to Kewstoke Primary School, the miles is small. A run as far as Cardiff, under 15 miles away, is a very different job. So is any distance on the M5, under 3 miles from Kewstoke, where the engine has been running hard throughout.
Driven till it protested. Knocking, a lumpy idle, smoke, a throttle that has gone soft. The motor is telling you your fuel is no longer acting like diesel. Whether it is the verge on Kewside, a lay-by or a side street, stop there and leave it. Long-term damage is very unusual if a car is stopped soon, and the fuel drain and flush-through that still come first deal with it.
Kewstoke motorists and that petrol in a diesel stories they hear
False: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — the tank just holds more of the same blend. A diesel fuel system doesn't accept petrol by percentage in the way that guidance assumes.
Not so: a current diesel copes with a bit of petrol. Rather, the opposite. At higher pressure, through more precise parts: that's how a modern diesel moves its fuel, so the protection matters more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor normally means a motor that will not run: the motorist stops, and so does the harm. Feed petrol to a diesel and it usually fires up, idles and drives away as if nothing has happened — all the while its pump wears. Running doesn't mean fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct fault. It does not put back what petrol has diluted, and the petrol is still in your tank later on.
"Drain it yourself and you are sorted" — a myth, because after it has been running some petrol sits in the fuel filter and lines, waiting to go straight back through your pump at the next start. Also, a can of petrol filled at the kerbside is genuinely risky.
Petrol in a diesel: how does it occur?
No one does it on purpose, and it is seldom carelessness. One way only, because of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally will not fit a petrol car. That's how the forecourt makes it easy.
It takes place when habit and your car stop matching. Hire cars, courtesy cars, and vehicles that are new to you. Two vehicles on one drive, one petrol, one diesel. The pumps in a different order on a familiar forecourt. Rushing for a train at Weston Milton and filling up en route. Exactly the moment it takes place: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. Add rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Next time you fill up in Kewstoke: avoiding petrol in a diesel
- Read the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, yet not on every forecourt. The label is what counts.
- Check the filler flap. Many motors 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.
- Good intentions do less than a sticker or a fob in a vivid colour on your diesel's key if a home has one of each. So label it.
- Before the nozzle leaves the petrol pump the first time you fuel a hired or new motor, say "diesel" out loud. Daft, perhaps, but it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, so tuck the phone away and 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 exist for motors without one. They are a safety net, not a reason to stop checking the pump.
- Less petrol means a weaker mixture, and so stop as soon as you notice — while remembering that the next step is unchanged. It's still not to start the vehicle.
Already put petrol in a diesel in Kewstoke?
The order of things is brief, then. Don't switch your ignition on, and don't start it. The attendants at the forecourt — whether at Esso itself or wherever you filled up — will usually help roll it away from the pump if you ask. Then call 0333 366 0103 and tell us what got in, roughly how much, and whether it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate fault — Kewstoke has a page just for it.
What makes one Kewstoke petrol in a diesel job cost more than the next
An honest single quote doesn't exist here: four scenarios, four separate tasks. The situation itself does most of the work of moving your cost. The proportion counts next, meaning how much of your tank is petrol, and then the location of the car and whether getting to it is safe for a van.
That's why our technicians ask three questions before pricing rather than after: what went in, how much, and whether it has run. With the answers, there is a straight figure instead of a range.
About Kewstoke and its setting
Kewstoke is a small coastal village in Somerset, situated near the Bristol Channel and close to the nearby settlements of Worlebury and Norton. Kewstoke has a population of around 1435 people and is characterised by its predominantly detached housing stock. Kewstoke sits at a low elevation of 14 metres above sea level, looking out towards the Welsh coast. Kewstoke is located near several areas of natural beauty, including Ashcombe Park.
Across Somerset and around Kewstoke: fuel drain cover
Our vans answering petrol in diesel calls in Kewstoke, in the BS postcode area, equally work the spots near it, Worlebury, Norton and Ashcombe Park among them. No need to move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
Kewstoke: still at the pump?
No position is better: that's where you are. Leave the vehicle turned off, and ring.