Should You Worry? Petrol in a Diesel Car in Buckland
Provided it has not been started, you can worry far less than you likely are. Petrol resting in a diesel tank does nothing to your engine till something pulls it through the system — your ignition priming your pump, your starter, or driving itself. So the fair answer to the first question everyone in Buckland asks, "have I ruined it?", is generally no. Leave your engine off then phone Petrol in Diesel — that keeps it like that. Further down, you will find what petrol actually does inside a diesel, how far it might have got, and how to stop it happening to you a second time.
Inside your engine: what petrol in a diesel really does
Two tasks fall to diesel on its journey round a motor. Before it combusts, it lubricates — then it burns. Designed to extremely fine clearances, the fuel injectors and the pump rely on your diesel moving through them to stop their surfaces wearing against one another.
Of these two tasks, petrol handles the first poorly and the second not at all. The knocking comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication your system rests on, and any pump running on such a mixture is wearing itself.
Put those together and the shape of the trouble is clear. Not contact but circulation is what causes the damage. Petrol in the tank is a fuel problem. A pump that has been working on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the fuel injectors further on.
Petrol in a diesel in Buckland: how bad is it? Four situations
Fuelled but never started — the best it gets. Being at a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With the petrol kept inside your tank alone, it is drained and purged right where it stands, and nothing more is needed.
Ignition on, or started for a moment. Once primed, the fuel system has pulled petrol from that tank up to your filter and your lines. Usually little more than draining, cleaning and sorting your filter, so still simple.
Driven a couple of miles. Now your pump has spent those miles working on weakened fuel. How hard the car was driven counts as much as how far, and the work takes in that tank, your lines, your filter and clean fuel through the entire system. A school run to Shatterlocks Infant and Nursery School is one thing. A run as far as Canterbury, under 15 miles away, is a very different job. So is any miles on the M20, under 10 miles from Buckland, where the motor has been labouring hard the whole time.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone lumpy. The motor is telling you the fuel is no longer behaving like diesel. Leave it where it stops: a lay-by, a side street, the verge on Park Road. The drain and flush still go first, and they take care of it: if a vehicle is stopped soon, permanent damage is very uncommon.
Buckland people and that petrol in a diesel myths they hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Topping up takes out nothing; it gives you a bigger tank of the same mix. Percentage is not how a diesel fuel system copes with petrol, whatever that guidance presumes.
Myth: a newer diesel copes with a bit of petrol. Rather, the reverse. Lubrication matters more on newer diesels, not less, because their fuel passes through finer components at higher pressure.
Myth: "If it starts and drives, there's no damage done." This is the one that fools people. Diesel in a petrol motor generally means a motor that won't run: the motorist stops, and so does the damage. A diesel fed petrol usually starts, ticks over and drives away as if nothing has happened, while your pump grinds. Running doesn't mean fine.
Myth: "Add some two-stroke oil and drive the car home." It's an outdated fix for a distinct issue. None of what petrol thinned gets put back by it — and afterwards, your tank still contains that petrol.
The next start draws petrol back round your pump from the fuel lines and the filter, where some of that sits after the motor has been run. That's why draining the tank yourself does not leave you sorted — a myth. Besides, petrol drained into a can by the road is truly dangerous.
Why petrol in a diesel happens at all
Nobody does it on purpose, and it is rarely carelessness. The forecourt makes it easy: the petrol nozzle is the smaller of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol car at all. So the slip runs one way.
It takes place when habit and your car stop matching. A car that is new to you — hired, on loan as a courtesy car, or brand new. Households running one of each, petrol and diesel. A well-known forecourt with the pumps in a different order. Filling up in a rush on the way to Dover Priory, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that is when. Your hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Next time you fill up around Buckland: preventing petrol in a diesel
- Check the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on each forecourt. The label is what counts.
- In a car you don't know, look inside the flap over the filler or at the cap before your first fill: plenty of vehicles state the fuel there.
- Good intentions do less than a sticker or a fob in a bright colour on the diesel's key when a home 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" aloud before you lift the nozzle off the petrol pump. It sounds silly and it does the trick.
- Mistakes like this are straightforward to make while your mind is on something else, so your phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices exist for vehicles without one. They are a backstop, not a reason to stop checking the pump.
- Stop the moment you realise. Less petrol inside your tank makes a thinner mixture. It does not change what to do next, which is still not to start it.
Put petrol in a diesel in Buckland already?
In that case, there's just a short order of things. Leave it unstarted, with your ignition switched off as well. Ask the attendants to help you roll it clear of the petrol pump if you're still on the forecourt, whether that's BP or somewhere else. Next, 0333 366 0103. We will ask what was put in, roughly how much, and if it has been run.
If it was AdBlue rather than petrol, say so. That's a separate fault — corrosion and deposits and not lost protection — and it has its own page for Buckland.
One petrol in a diesel task in Buckland costs more than another. Why?
The four situations above are four separate tasks, so no single price for this would be honest. Which of them you are in is chiefly what moves the cost. Next it's the proportion — how much petrol went in against how much your tank holds — and then where the car is and whether our van can reach it safely.
That's why our technicians ask three questions before pricing instead of after: what went in, how much, and whether it has run. Those replies change a range into a straight figure.
About Buckland and its setting
Buckland is a suburban area in Kent, situated near the coast and approximately 13.6 miles from Canterbury. Buckland occupies a relatively low-lying area, with an elevation of around 18 metres, and is characterized by terraced housing. Buckland is part of the wider urban area surrounding Canterbury, with nearby places including Buckland Valley and St Radigunds. Buckland has a population of around 9864 residents.
Fuel drain cover around Buckland and across Kent
Buckland rests in the CT postcode area, and our teams that answer petrol in diesel call-outs there work the spots near it as well — Buckland Valley, St Radigunds and Crabble among them. We drain where your car is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
At the petrol pump around Buckland, still?
Then you're in the best spot there can be. Keep it turned off, then ring.