Nethertown: Petrol in a Diesel Car? How Worried to Be
Provided it hasn't been started, worry far less than you probably are. Till the ignition primes the pump, your starter turns, or the car is driven, petrol in a diesel tank just sits there and does nothing. Which makes the truthful reply to that first Nethertown question — "have I wrecked it?" — normally no. Leave the engine off then phone Petrol in Diesel — that is how you keep it like that. What petrol actually does to a diesel, how to gauge how far it has gone, and how to keep it from happening again: that is the remainder of this page.
Inside the motor: what petrol in a diesel really does
Two jobs fall to diesel on its route round a motor. It lubricates to begin with, and only then does it burn. The high-pressure fuel pump and your injectors are built to very fine gaps, and your diesel passing through them is what keeps those surfaces from grinding against one another.
Badly at the first, not at all at the second: that's petrol. The clattering comes from petrol being made not to ignite when compressed, which is precisely 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 working on such a mix is wearing itself.
Together, those make the shape of the problem plain. Not contact but circulation is what causes the harm. A tank with petrol in it is a fuel problem. Whatever a worn pump sheds travels on, carried by the fuel, into your injectors further along, which is why a pump that has worked on that petrol is where a mechanical fault begins.
Nethertown, petrol in a diesel: four cases, from mild to significant
Fuelled up, not once started. The best case there can be. Being on a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With that petrol held inside your tank alone, it's cleared and purged right where it stands, and nothing more is needed.
Your ignition turned on, or a brief start. With the system primed, your lines and filter already contain petrol that has come from your tank. That's generally still a straightforward job — a drain, a flush, and your filter seen to.
Those few miles on the road were your pump running on fuel weakened by petrol throughout. Tank, lines, filter, then clean fuel put through the entire circuit: that is this work, and the way your car was driven matters as much as the mileage. The school run to Whalley Church of England Primary School is one thing. Very different a second time: a trip to Preston, under 15 miles away, or any distance on the M65, under 5 miles from Nethertown, where your engine never stopped working hard.
Driven on till it protested — knocking, smoke, an uneven idle, a dead throttle. The fuel isn't acting like diesel any more, and your motor is saying so. Stop wherever you are — the verge on Calderstones Drive, a lay-by, a side street — and leave the car there. Permanent damage is very unusual if a vehicle is stopped soon, and the fuel drain and flush-through that still go first deal with it.
Stories Nethertown drivers hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up removes nothing; it gives you a fuller tank of the same mixture. That guidance presumes a diesel fuel system handles petrol by percentage. It doesn't.
"Modern diesels can handle a little petrol" — a myth, and nearer the opposite. A current diesel sends its fuel through finer parts at higher pressure, which makes the protection matter more, not less.
The myth that catches drivers off guard: if it starts and drives, it must be unharmed. Feed diesel to a petrol motor and it normally won't run, so the motorist stops — and the harm stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump wears. Running does not mean fine.
Not so: a two-stroke additive makes it safe to drive home. It is an old workaround, supposed for another problem. What petrol has diluted remains thinned, and the petrol remains in the tank anyway.
The next start draws petrol back round the pump out of the fuel lines and the filter, where some of it sits once the motor has been run. That's why a DIY tank drain does not leave you sorted — a myth. Emptying petrol into a can by the roadside is also genuinely hazardous.
Why petrol in a diesel happens at all
A careless moment is seldom the cause, and nobody means to do it. One way only, since of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly won't fit a petrol car. That's how the forecourt makes it straightforward.
Routine and your car getting out of step is when it occurs. Courtesy car, hire car, or a motor that's brand new. One petrol and one diesel on the driveway of the same household. A well-known forecourt with the pumps in a different order. Filling up in a hurry on the way to Whalley, with a train to catch. Exactly the moment it happens: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. Your hand does what it has always done once you add rain, a phone call or a back seat full of children.
Avoiding petrol in a diesel next time you fill up around Nethertown
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Check the petrol pump's label; the colour is only a clue.
- The first fill in an unfamiliar car is the time to check your filler flap — on it, or on the cap, many cars state the fuel to use.
- A coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember, for a home with one of each.
- It sounds silly and it does the trick: on the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump.
- Tuck the phone away. This is an easy mistake to make whilst you're thinking about something else.
- Some diesels come with a filler built to reject a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the pump.
- Less petrol makes a weaker mixture, so stop the moment you notice — while remembering that the next step is unchanged. It is still not to fire it up.
Petrol already in a diesel around Nethertown? Begin here
The order of things is brief, then. Do not turn the ignition on, and do not fire it up. The staff on the forecourt — whether at Asda itself or wherever you filled up — will normally help roll it away from the petrol pump if you ask. Then call 0333 366 0103 and tell us what got in, about how much, and whether it's run.
Say so if it was AdBlue instead of petrol: it's a separate issue, with its own page for Nethertown, because AdBlue brings corrosion and deposits instead of lost lubrication.
What makes one Nethertown petrol in a diesel task cost more than the next
There is no honest single quote for this, because the four situations above are four separate tasks. The scenario itself does most of the work of moving your cost. The share matters next, meaning how much of that tank is petrol, followed by the location of the car and whether reaching it is safe for a technician.
That's why our engineers ask three questions before pricing instead of after: what got in, how much, and if it's run. A range turns into a straight figure when the answers are in.
About Nethertown
Nethertown is a village in Lancashire, situated on the riverside at an elevation of 64 metres, with detached housing being the predominant type of accommodation. Nethertown lies near the cities of Preston and the surrounding villages of Whalley, Barrow, and Billington, in the North West region of England. Nethertown has a population of approximately 1231 residents and is located 12.4 miles from Preston. Nethertown is also relatively distant from London, at 186.9 miles away.
Nethertown and Lancashire: where our fuel drain cover runs
The teams answering petrol in diesel call-outs around Nethertown, in the BB postcode area, equally work the places around it, Whalley, Barrow and Billington included. Our engineers drain wherever your vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Nethertown: still at the petrol pump?
Then, you could not be in a better spot. Turned off it remains; then phone.