How Worried Should You Be? Petrol in a Diesel Car in Sidford
Provided it hasn't been started, you can worry less than you probably are. Petrol resting in a diesel tank does nothing to your motor until something pulls it through the system — the ignition priming your pump, your starter, or the drive on its own. So the truthful answer to the first question anyone in Sidford asks, "have I ruined it?", is usually no. Leave the engine off then phone Petrol in Diesel — that is how you keep it that way. What petrol really does to a diesel, how to judge how far it's gone, and how to keep it from happening a second time: that is the remainder of this page.
Your engine and petrol in a diesel: what goes on
On its way through a motor, diesel has two tasks. Oiling comes before burning; it does both. Very fine tolerances go into the injectors and the high-pressure fuel pump, and only your diesel flowing through stops those surfaces grinding together.
The second task petrol doesn't 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 away the lubrication the system hinges on, and any pump running on that mix is wearing itself.
The shape of the issue is plain once you put those together. It's movement that causes the damage, not contact. Any tank with petrol in it is a fuel problem. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the fuel injectors further on.
How bad is petrol in a diesel? Four scenarios our engineers see in Sidford
Filled but not once started — as good as it gets. Being on a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With the petrol held in your tank alone, it's emptied and purged on the spot, and nothing more is needed.
Started for a second, or just your ignition on. With your system primed, the lines and filter now contain petrol that came from the tank. Drain, flush, see to your filter: still normally simple.
A couple of miles driven, and your pump has spent every one of them labouring on thinned fuel. How hard the vehicle was driven matters as much as how far, and the work covers your tank, the fuel lines, the filter and clean fuel through the entire system. The school run to Sidmouth Church of England (VA) Primary School is one matter. Very different a second time: a run to Exeter, under 15 miles away, or some miles on the M5, under 10 miles from Sidford, where the motor never stopped running hard.
Driven on until it protested — knocking, smoke, a lumpy idle, a soft throttle. What you are hearing is your motor signalling fuel that no longer acts like diesel. Stop wherever you are — the verge on Burscombe Lane, a lay-by, a side street — and leave the vehicle there. A vehicle pulled over early very rarely has permanent damage, since the fuel drain and the flush, which still come first, sort it out.
What Sidford people get told about petrol in a diesel — and the stories in it
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing is removed when you top up — the tank just holds more of the same mixture. Percentage isn't how a diesel fuel system copes with petrol, whatever that guidance presumes.
If anything, the opposite holds. Myth: "A current diesel can cope with a bit of petrol." Lubrication counts more on newer diesels, not less, since their fuel passes through finer components at higher pressure.
The myth that catches drivers off guard: if it starts and drives, it must be unharmed. The motorist of a petrol motor fed diesel usually stops, because it will not run, and the harm stops with them. Feed petrol to a diesel and it generally fires up, idles and drives away as if nothing happened — all while its pump wears. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive the car home." It's an outdated fix for a distinct fault. It doesn't put back what petrol has weakened, and that petrol is still in your tank after that.
Once the motor has been run, part of the petrol sits in the filter and the lines, not that tank — and your next start pulls it right back through the pump. So the myth "drain your tank yourself and you're sorted" doesn't stand up. And, a can of petrol filled at the kerbside is truly risky.
Petrol in a diesel: how does it happen?
It's seldom carelessness, and no one does it on purpose. One way only, since of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol car. That is how the forecourt makes it easy.
It occurs when routine and your car stop matching. Courtesy car, hire car, or a motor that's new. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Fuelling up in a hurry en route to Feniton, with a train to catch. Exactly the moment it occurs: after years of driving petrol, a driver fills a diesel Volkswagen Golf for the first time. Add a back seat full of kids, a phone call or rain, and the hand takes over.
Sidford people: how to avoid petrol in a diesel next time
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Read the pump's label; the colour is only a clue.
- In a car you don't know, look inside the flap over the filler or at the cap before your first fill: plenty of motors print the fuel there.
- Good intentions do less than a sticker or a fob in a vivid colour on the diesel's key if 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 take the nozzle off the petrol pump. It sounds daft and it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away and keep your mind on the petrol pump.
- Add-on devices exist for motors without one, and some diesels are built with a filler that won't take a petrol nozzle. Useful — but a safety net only, never a reason to stop checking the label.
- Stop the moment you notice. Less petrol inside your tank means a thinner mix. It does not change what to do next, which is still not to crank it.
Put petrol in a diesel around Sidford already?
Then, there's just a short order of things. Leave it unstarted, with the ignition off too. The staff at the forecourt — whether at the nearest petrol station itself or wherever you filled up — will normally help push it away from the pump if you ask. Next, 0333 366 0103. We will ask what went in, about how much, and if it's been run.
Say so if it was AdBlue instead of petrol: it's a separate fault, with its own page for Sidford, because AdBlue brings corrosion and deposits rather than lost lubrication.
What makes one Sidford petrol in a diesel task cost more than the next
Four separate jobs sit behind the four scenarios above — which is why there's no fair single quote. What shifts the cost is mostly which of them you are in. Where the vehicle is counts too, and whether a van can safely reach it, after the share of petrol to what your tank takes.
What went in, how much, and whether it's run — three queries our technicians ask before pricing, not after, for precisely that reason. With the replies, there is a straight figure rather than a range.
About Sidford
Sidford is a suburban area in East Devon, situated near the coast and approximately 13 miles southeast of Exeter. Sidford sits at an elevation of around 92 metres, overlooking the surrounding countryside and nearby settlements like Lower Woolbrook, Middle Woolbrook, and Higher Woolbrook. Sidford is characterised by its predominantly detached housing stock, reflecting its development as a residential area. Sidford remains a popular residential location, with a population of around 2725 people.
Across Devon and in Sidford: fuel drain cover
Our vans answering petrol in diesel calls in Sidford, in the EX postcode area, also work the places around it, Lower Woolbrook, Middle Woolbrook and Higher Woolbrook among them. No need to move your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots where we work.
At the petrol pump around Sidford, right now?
No position is better: that's where you are. Keep it off. Ring.