Petrol in a Diesel Car in Bowdon: How Worried Should You Be?
Likely less than you already are — provided nobody has started the car. Petrol resting in a diesel tank does nothing to your engine until something pulls it through the fuel system — the ignition priming your pump, your starter, or driving itself. So the truthful answer to the first query anyone in Bowdon asks, "have I wrecked it?", is generally no. To leave the car that way, phone Petrol in Diesel then leave your motor switched off. What petrol really does to a diesel, how to gauge how far it has gone, and how to stop it from happening a second time: that's the rest of this page.
The motor and petrol in a diesel: what happens
Diesel does two jobs on its way through a motor. Lubricating comes before burning; it does both. What stops the surfaces inside the high-pressure pump and the injectors from wearing against each other is your diesel passing through them — they are built to very fine clearances.
Petrol handles the first job badly and the second not at all. It's runnier than diesel and removes the lubrication your fuel system hinges on, and so a pump running on a petrol mix is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the rattling comes from.
Put those together and the shape of the problem is clear. Not contact but movement is what causes the damage. Petrol in the tank is a fuel fault. Once your pump has been working on that petrol, a mechanical fault has begun: whatever is shed by a pump that's grinding is carried onward to your injectors with the fuel.
Bowdon, petrol in a diesel: four situations, from mild to major
Fuelled but never started — as good as it gets. That petrol is inside your tank and only the tank, and the task is a drain and a flush where your car stands. This is the one scenario that can only really happen at a forecourt, since anywhere else the car has been driven to get there.
Ignition on, or started for a second. With the fuel system primed, the fuel lines and filter now contain petrol that came from your tank. Drain, flush, deal with the filter: still usually simple.
Driven a few miles. Now the pump has spent these miles working on weakened fuel. The work is your tank, your lines, the filter and clean fuel through the entire circuit, and how hard your car was driven counts as much as how far. Short trips, such as the school run to Bollin Primary School, are one matter. Driving as far as Salford, under 10 miles away, makes a very different task — as does any mileage on the M56, under 3 miles from Bowdon, with the motor working hard the whole time.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone ragged. The engine is telling you your fuel is no longer acting like diesel. Leave it wherever it stops: a lay-by, a quiet street, the verge on The Firs. Permanent damage is very uncommon if a vehicle is pulled over soon, and the fuel drain and flush-through that still go first sort it out.
Myths Bowdon people hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. A bigger tank of the same mixture is all it gives, since topping up takes out nothing. The idea behind the guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: a modern diesel copes with a bit of petrol. If anything, the opposite. At higher pressure, through more precise parts: that is how a current diesel handles its fuel, and so the protection counts more, not less.
This is the one that catches motorists. Myth: "If it starts and drives, there's no damage done." Any petrol motor fed diesel generally won't run, so the driver stops and the damage stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile the pump grinds. Being able to run is not proof of being fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a separate fault. That petrol is still inside that tank afterwards, and whatever it has weakened isn't put back.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in your filter and lines, waiting to go straight back through your pump on the next start. It is also genuinely risky to drain petrol into a can at the kerbside.
How it happens: petrol in a diesel
Carelessness is rarely the cause, and nobody means to do it. The petrol nozzle is the narrower of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol vehicle at all. The forecourt makes it easy, and the slip runs one way.
It occurs when habit and the vehicle stop matching. A new car, a hire car or a courtesy car. Households running one of each, petrol and diesel. Your usual forecourt, its pumps now in a different order. A hurried fill en route to Hale with a train to catch. Precisely the moment it takes place: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. Throw in 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 Bowdon: avoiding petrol in a diesel
- Green for unleaded and black for diesel is usual in the UK — yet not on every forecourt. Trust the label on the petrol pump, not the colour.
- Inspect your filler flap. Many vehicles state the fuel inside the flap or on the cap. Look at it on the first fill in a motor you do not know.
- Good intentions count for less than a sticker or a fob in a vivid colour on your diesel's key if a house has one of each. So mark it.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. It seems silly and it works.
- While you're thinking about something else, this is an easy mistake to make — so tuck the phone away.
- Some diesels have a filler designed to refuse a petrol nozzle, and devices you can add are available for vehicles without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the petrol pump.
- Stop the moment you realise. Less petrol in the tank makes a weaker mixture. It does not change what to do next, which is still not to start the vehicle.
Petrol already in a diesel in Bowdon? Begin here
Short and simple, then, is the order of things. Don't turn the ignition on, and don't crank it. Yet on the forecourt, at Shell or anywhere else? Ask the attendants to help you roll the vehicle clear of the pump. Next, 0333 366 0103. We will ask what was put in, about how much, and if it's been run.
Say so if it was AdBlue rather than petrol: it is a different issue, with its own page for Bowdon, since AdBlue brings corrosion and deposits instead of lost lubrication.
Why one petrol in a diesel job around Bowdon costs more than another
A fair single quote doesn't exist here: four situations, four separate tasks. Chiefly, the cost moves with which situation you are in. The proportion matters 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, we ask three questions: your fuel that got in, the amount, and whether it's run. That's why. A range turns into a straight figure when those replies are in.
About Bowdon
Bowdon is a locality in Greater Manchester, situated inland at an elevation of 71 metres, approximately 7.6 miles from Salford. Bowdon is characterised by its predominantly detached housing stock, reflecting its suburban nature. Bowdon is close to nearby places such as Rosehill, Bowgreen, and Altrincham, and is around 159.9 miles from London.
Fuel drain cover in Bowdon and across Greater Manchester
The vans answering petrol in diesel call-outs in Bowdon, in the WA postcode area, also work the places near it, Rosehill, Bowgreen and Altrincham included. A forecourt, a supermarket car park, a lay-by or your own driveway are all places we drain, and your car doesn't need to move to us.
At the pump around Bowdon, still?
Then, you couldn't be in a better place. Call, and keep it turned off.