Lilliput: Put Petrol in a Diesel Car?
With your tank still carrying the petrol and your engine not yet turned over, almost every job needs only a drain, so keep the motor off. That result is settled in the minutes immediately after the fill-up, and not by the amount that went in. Throughout Lilliput and the rest of Dorset, Petrol in Diesel drains the vehicle and cleans it where it is, whether by a roadside, on a private drive or at a forecourt. Our team shall show you what the next stage will be. Ring us — that comes before anything else.
Your next five minutes: petrol in a diesel
- Never start the car. Turned on anyway? Then don't believe it. Diesel in a petrol vehicle usually can't run, so the driver stops and the wear stops with them. Petrol in a diesel? It starts. It idles. It moves off fine, for a couple of miles. Motorists get that backwards. It is not all right — the fuel system is grinding every mile you drive.
- Diesel ignites, and before it combusts it lubricates — that injection pump, the injectors. Petrol manages only the burning. So leave the ignition alone too: flicking it on is usually enough to prime that system, and priming draws petrol from the tank into exactly those parts.
- Topping up takes out nothing. It gives you a fuller tank of the same mixture, because a diesel fuel system will not accept petrol by percentage in the way that advice assumes — so don't pour diesel on top to dilute it. Grade is beside the point too: super unleaded is petrol.
- A car that hasn't shifted is the simplest one to sort, and so wait where you are if you reasonably can. Parked on the verge on Dorset Lake Avenue? Hazards on, and leave it there. A difficult spot works for us better than a started engine.
- The van turning up instead of circling depends on two things: a postcode that starts BH14 8, and whatever is nearest to you with a name on it. Keep both prepared before you dial.
- What went in, roughly how much, plus if the engine has run — those three replies shape the whole job. Phone 0333 366 0103 and tell us.
Can petrol be taken out of your diesel on a forecourt?
The job begins at the pump, mostly. Often enough the job wraps up there as well. We work on garage forecourts all the time, with the station's agreement, so if you're still at Texaco that's generally where the drain gets done.
A forecourt is the only setting it gets spotted before your motor has started. Fuel pulled out of the tank and through your filter, all the way to your high-pressure pump, is what happens when your engine is fired up and the car is driven to where it is now: the car park, the drive or the lay-by, everywhere other than the forecourt. So the flush covers the fuel filter and the fuel lines as well as your tank. That is still not a calamity, and our technicians deal with it where your car is. What decides it is whether the ignition was turned in the seconds after your receipt was checked.
Staff will usually chip in pushing it away from the pump, which lets the next customer get past. Welcome the offer. Starting it just to shift four car lengths is not.
Will our technicians cover your corner of Lilliput?
Canford Cliffs, Parkstone, Sandbanks, Branksome Park, Upper Parkstone — every one of these on our journeys that take us over to Lilliput itself, a residential suburb.
There are pages for most towns across Dorset, and the ones listed above are just the immediate neighbours — so yours being missing from this list tells you nothing about if we come. Near the boundary, or somewhere the satnav struggles with? Phone and check instead of assuming.
The map is the area the page includes. Roadside, forecourt, driveway, car park: the lot is ground we cover, and none of it requires your vehicle to travel to us.
Your diesel BMW 3 Series will have felt perfectly ordinary on the way back from Lilliput Church of England Infant School. They do, and that is the catch with petrol in a diesel and not the other way round. Put diesel in a petrol car and it generally won't run, and so the driver stops and the harm stops with them. Put petrol in a diesel and it fires up, ticks over and moves off as though nothing has happened — meanwhile your high-pressure pump keeps working without the lubrication your fuel is meant to be supplying. Nothing alerts you, since from the driver's seat there's nothing to alert you about. Phone with roughly how far you went and how hard you drove it; the second answer matters more than the first.
Pull over somewhere sensible, turn off and ring us. Normal on the way out to Luscombe Valley Nature Reserve, flat on the way back? Then look at your tank. Petrol weakens diesel; weaker fuel leaks past the tightly fitted components that build injection pressure; and the farther the diesel Nissan Qashqai went, the less of that pressure it held.
Why so direct about leaving the keys alone? Because your pump is upstream of your injectors, and a wearing one sends whatever it gives off onward with the fuel. Ring us. Leave the Audi A4 by Evening Hill.
Unfamiliar places are where this happens most, and the reason is mechanical rather than sloppy: the narrower petrol nozzle goes into a modern diesel filler neck with practically no resistance at all. Filled up near Church of The Holy Angels without thinking, in a diesel Dacia Duster you have had for two days? Call us where you are. Hire and courtesy cars often get driven further before anybody spots it, and miles is what determines how much petrol ends up at the injectors.
No dashboard light exists for this, which is why cars in that position typically get driven again before somebody calls. Don't be one of them. The throttle went dead and your idle turned lumpy after a few streets, and the diesel Vauxhall Astra is now resting by Blake Hill Viewpoint. Softness there means fuel that cannot build pressure properly rather than an engine giving up. Turn off. Ring us.
Roadside call-outs in Lilliput
The chance to stop somewhere suitable doesn't fall to everyone. Set off, then noticed? Landed on the verge on Avalon, or sat in some lay-by with the hazards going? That's a routine call here. Not an odd one.
Out of your car if it is not sensible to be there, beside it when it is. It will usually oblige. A diesel running on petrol limps along quite willingly, and that's the problem: start it up to get to somewhere safer and the mixture goes further into the system with every mile driven. A van coming to a difficult spot is no bother for us, and it's far better for the vehicle than driving on.
A few miles on petrol in a diesel: what next?
The M27 is the road which counts now, and it lies under 25 miles from Lilliput. A wrongly fuelled diesel will frequently take you onto it and some way along before anything feels wrong, and the symptoms when they appear are normally a loss of power, a lumpy idle and some smoke instead of a clean stop.
Do not restart it to move it. Get off at the next safe exit then switch off. On a longer drive — anything near the under 50 miles to the closest city — assume the mixture has been through your filter, the pump and your injectors, and mention it when you ring. It affects what our engineers bring.
About Lilliput
Lilliput is a coastal suburban area in Dorset, situated near the popular beaches of Poole Bay. Lilliput lies close to the neighbouring areas of Canford Cliffs and Parkstone, and is also near the renowned Sandbanks peninsula. Lilliput has a population of around 2094 people, predominantly living in detached houses, and is located at a low elevation of 12 metres above sea level.
Once our engineers arrive with you in Lilliput: what happens
- Our engineers check what went in, how much, and if your motor has run. The answers alter the work, which is why we ask before quoting.
- That tank is drained of everything.
- Lines rinsed, filter cleaned. Whatever remains later on isn't the thing that created the problem.
- The system gets primed, on new diesel.
- The engine is started and checked to be sure it runs properly on new diesel.
The car is then ready for you to pull away. There's no need for a workshop at any stage, as the work is all done where your car is, and when it is caught quickly, long-term damage is very unusual.
A different problem: AdBlue in a diesel tank around Lilliput
The issue is not the same, though the opening rule is — don't fire it up — if what went in was AdBlue rather than petrol. Petrol does two things to diesel: dilutes it, and strips out the lubrication the system relies on. AdBlue? Urea dissolved in water. Pour that in with your diesel and you get rust instead, plus deposits.
Both are ours. There's a separate Lilliput page for AdBlue removal, with the detail on it — including the reasons it frequently turns out to be the worse of the two.
What a petrol-in-diesel drain will cost in Lilliput
Frankly, no single price fits on a page like this. The job changes. Here's what changes it:
- Whether the motor has been run or driven. This is the big one.
- How much of the wrong fuel was put in, judged against how much the tank can hold.
- Which went in: petrol or AdBlue.
- Whether a van can safely reach the vehicle and work on it, which depends on where your vehicle is.
A straight answer instead of a range is what you get for telling us three things: the vehicle, the quantity, and if it has run. For your car at home that's going nowhere and is not pressing, is fine too.
Questions we get about petrol in diesel around Lilliput
At a petrol station around Lilliput, can you do a fuel drain there?
A good part of this work happens there, so yes. Routinely, provided the site agrees: Fuel Berth, plus every other forecourt nearby. Say on the phone where precisely you have stopped. Whether our technicians can work in that place is something we answer straight away.
Is there a sensible amount of petrol in a diesel?
Whether your motor has run counts far more, though the proportion counts too, instead of the litres. An almost empty tank with five litres in it, against a full one with the same five: different scenarios, of course. Either way, the work needed comes down to one thing, which is if the fuel system has had that mixture pulled through it.
I put petrol in my diesel and drove it. What now?
Turn off somewhere safe, and keep it that way after you stop. It's recoverable much more often than people assume, even though driving is what shifts the trouble from that tank into your pump and injectors — and the single most valuable thing you can do now isn't restart it.
My warranty — does a fuel drain void it?
A drain then flush carried out properly isn't a change and doesn't invalidate a manufacturer's warranty. What is likelier to start a disagreement is a diesel that has been run on petrol. One more good reason for the motor to stay off.
Can I just add two-stroke oil and drive home?
No. Two-stroke oil is an old remedy for a different fault and it doesn't replace what petrol has thinned. Later on? Still petrol in your tank, and a pump that has to put up with the stuff.
Does petrol in a diesel have to go to a main dealer?
There's no need to take it to a dealership, since we drain and flush the car wherever it is.
You, and your vehicle, still together?
Shut off is how it remains.
Driven it already? Then somewhere safe, stop, switch off, and no restarting it later. This is recoverable from much more regularly than drivers assume, and a still, cold car is the best position to be in.
On-site fuel draining in Lilliput and throughout Dorset — at the kerbside, on the forecourt or at home.