Should You Worry? Petrol in a Diesel Car in Wrawby
Not started? Then less anxious than you likely feel. "Have I ruined it?" is the first question anyone around Wrawby asks, and the truthful answer is generally no, since petrol left in a diesel tank hurts nothing until it's dragged through your fuel system — by ignition priming, by the starter, or by being driven. Keep it that way: leave the engine off and call Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and ways to make sure you never do it again.
Inside your engine: what petrol in a diesel really does
Diesel has two jobs on its way through a motor. It combusts, and before it ignites it lubricates. The high-pressure pump and your injectors are made to very fine gaps, and your diesel passing through them is what keeps those surfaces from wearing against one another.
Of these two tasks, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, leaving a pump running on the blend wearing itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the clattering.
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 issue. The beginning of a mechanical problem is a pump that has been running on that petrol — and whatever a worn pump sheds travels on with the fuel to the fuel injectors beyond it.
Four scenarios we see in Wrawby: how bad is petrol in a diesel?
Filled up, not once started. The best case there can be. Being on a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With that petrol held in your tank alone, it is drained and purged right where it stands, and nothing more is needed.
A moment's running, or merely your ignition on. Once primed, your system has drawn petrol from that tank up to the filter and the lines. Drain, flush, deal with your filter: still usually easy.
A couple of miles driven, and your pump has spent every one of them working on thinned fuel. Tank, lines, filter, then clean fuel put through the whole system: that's the work, and the way your car was driven matters as much as the distance. A school run to Wrawby St Mary's CofE Primary School is one matter. A run as far as Kingston upon Hull, under 15 miles away, is a very different task. So is any distance on the M180, under a mile from Wrawby, where your engine has been working hard throughout.
Rattling, a lumpy idle, smoke, a throttle gone soft: driven till it complained. That is your engine telling you its fuel no longer is acting like diesel. Pull up where you are — on the verge on Little Lane, at the kerb, down a side road — and do not move it. The fuel drain and flush still go first, and they sort it out: if a car is stopped soon, long-term damage is very rare.
What Wrawby people get told about petrol in a diesel — and the stories in it
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. Percentage isn't how a diesel fuel system copes with petrol, however much that advice presumes.
"Current diesels can handle a little petrol" — a myth, and nearer the opposite. Smaller parts and higher pressure are the way a current diesel runs its fuel, and that makes the lubrication count more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there's no damage done." Diesel in a petrol motor generally means a motor that won't run: the driver stops, and so does the damage. Feed petrol to a diesel and it generally starts, idles and drives away as if nothing has happened — all the while its pump is wearing. Fine and running aren't the same at all.
Myth: "Add some two-stroke oil and drive it home." It is an outdated fix for a different fault. None of what petrol thinned gets put back by it — and afterwards, the tank still contains that petrol.
Once the engine has been run, part of that petrol sits in the fuel filter and the fuel lines, not the tank — and the next start pulls it straight back through the pump. So the myth "drain your tank yourself and you are sorted" does not hold. On top of that, petrol drained into a can by the road is genuinely risky.
Petrol in a diesel: how does it occur?
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slides into a diesel filler with almost no resistance, while a diesel nozzle generally will not go into a petrol motor at all. So the slip runs one way.
It takes place when routine and the vehicle stop matching. Courtesy car, hire car, or a car that's brand new. Two cars on one drive, one petrol, one diesel. A forecourt you know, only with its pumps laid out differently. A rushed fill en route to Brigg with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is precisely the moment it takes place. Your hand does what it has always done when you add rain, a phone call or a back seat full of kids.
Wrawby motorists: how to avoid petrol in a diesel next time
- The label is what matters, so check the pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on each forecourt.
- Check your filler flap. Many cars state the fuel inside the flap or on the cap. Look at it on your first fill in a car you don't know.
- Good intentions do less than a sticker or a fob in a bright colour on your diesel's key if a home has one of each. So label it.
- It sounds daft and it works: on your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump.
- Mistakes like this are easy to make while your mind is on something else, and so your phone goes away.
- Add-on devices exist for cars without one, and some diesels come with a filler that won't take a petrol nozzle. Helpful — but a backstop only, never a reason to stop checking the label.
- Noticing it halfway? Stop there and then. A thinner mix follows from less petrol in that tank, but your next stage stays the same: don't crank it.
Already put petrol in a diesel in Wrawby?
Then the order of things is brief. Starting it is out, and so is switching on the ignition. Yet at the forecourt, at Tesco or anywhere else? Ask the attendants to help you push the car away from the petrol pump. Next, 0333 366 0103. We'll ask what went in, roughly how much, and if it has been run.
Say so if it was AdBlue rather than petrol: it's a different problem, with its own page for Wrawby, since AdBlue brings corrosion and deposits rather than lost lubrication.
What makes one Wrawby petrol in a diesel task cost more than the next
There is no fair single quote for this, since the four situations above are four different jobs. Which of them you're in is mostly what moves your cost. The share matters next, meaning how much of your tank is petrol, followed by the location of the vehicle and whether getting to it is safe for our van.
Ahead of any quote, not after, we ask three queries: the fuel that went in, the quantity, and if it has run. That's why. Given the answers, you get a straight figure rather than a range.
About Wrawby
Wrawby is a village in northern Lincolnshire, situated inland at an elevation of around 35 metres, and is located near the towns of Brigg and Kingston upon Hull. Wrawby has a population of approximately 1525 residents and predominantly features detached housing. Wrawby is positioned about 13 miles from Kingston upon Hull and around 143 miles from London, placing it in a relatively rural setting within the wider region.
Fuel drain cover around Wrawby and across Lincolnshire
Brigg, Westrum and Coskills are among the places around Wrawby that the same vans work, answering petrol in diesel call-outs across Wrawby's DN postcode area. We drain wherever your car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
At the petrol pump in Wrawby, still?
In that case, you could not be in a better spot. Keep it off. Phone.