Put Petrol in a Diesel Car in Winchester? Don't Start It
With the tank still carrying the fuel and the motor not yet started, nearly every job needs only a drain, so keep your engine off. That result is determined in the minutes straight after the fill-up, rather than by the amount that got in. Throughout Winchester and the remainder of Hampshire, Petrol in Diesel drains the vehicle and cleans it where it is, whether by a roadside, on a drive or at a forecourt. A single ring our way is enough: we can tell you what follows after this. Do this first.
What to try first about petrol in a diesel
- Never crank it — and never believe it when it fires up. That is the part most people get wrong about petrol in a diesel especially. A petrol engine given diesel usually just can't run, and so the motorist stops and the damage stops with them. A diesel fed petrol normally starts, idles and drives off quite happily for several miles. It is not fine. It's wearing your fuel system as you drive.
- Two things, diesel: it combusts, and on the way through it keeps the high-pressure fuel pump and injectors oiled. Petrol only manages the one. That is why the ignition remains off as well — switch it on and you usually prime that system, and that is petrol leaving the tank for precisely those parts.
- Topping up gets rid of nothing. It gives you a larger tank of the same blend, since a diesel fuel system won't accept petrol by percentage as that guidance assumes — so don't pour diesel on top to water down it. Octane is immaterial too: super unleaded is petrol.
- Remain where you are if you safely can. A motor that has not moved is the simplest one to deal with, and we would sooner come to an awkward place than have it started. If you're parked on the verge on The Broadway, switch your hazards on then leave the vehicle there.
- The van showing up rather than circling rests on two things: a postcode starting SO23 9, and whatever is nearest to you with a name on it. Keep both prepared before you dial.
- Ring 0333 366 0103. Anticipate three points — what got in, approximately how many litres, and if your car has been run. The responses shape all that comes after.
Nothing about the hours since has lost you anything. Fuel in a tank is harmless, and so a diesel Volkswagen Golf parked at the nearest station this morning is no worse at five than it was at nine — what drew diluted diesel through your pump was the drive in. Ring us before you set off to collect the vehicle.
Car parks like the one outside Sainsbury's are a place we attend all the time, and the fuel is hardly ever the complicated part. The bay is: motors either side, a trolley shelter behind, sometimes a height barrier on the way in that settles if a van can reach you at all. So tell us how penned in you are when you ring, and which way your car is facing. When our technicians cannot work beside the diesel Renault Clio we will shift the car without running it — and that's not pedantry about a couple of seconds of running. Any start primes that fuel system and draws more of that mixture out of the tank and on to your pump, and so a motor shuffled twice into a nicer bay has silently grown into a harder job than one left precisely where it stopped.
Every restart primes the fuel lines and draws more petrol through the filter and into your pump. So a misfilled diesel Peugeot 308 on the zig-zags at St Bede Church of England Primary School is a hassle, while the same car fired up three more times to be courteous is a fuel system and not a tank. Someone will advise you to move the car out of the gateway and sort it out later. Don't. Leave it, let people complain, and phone us.
Here is the full mechanism. Diesel needs enough body to seal the tight tolerances it goes through, and petrol takes that away. That is it. Which accounts for the normal Abbey Gardens call — a diesel Audi Q5, out there without a murmur and back down on power, rough at idle, possibly a bit of smoke. Injection systems work hydraulically as well as chemically, so the fuel has to hold pressure and not just burn; thinned, it leaks past those clearances instead of building, and delivery comes poorer, later, less even than the motor was engineered around. Not a failing engine, though. Fuel that has stopped acting like diesel. Put that right and it stops.
Three things help when you ring from close to The Welcome Gospel Hall: which side the filler is on, whether a van can stand next to without blocking the road, and whether the engine has run since you filled up. On-street is the most common spot our engineers work, so the spot itself is seldom the issue — we'd far rather deal with a tight parking spot than with a motor that has been driven to somewhere more handy. We'll drain your Volvo XC60, change your filter where there is a workable one, flush the lines then put clean fuel through the whole circuit, because by this point the worst of that is resting in your lines instead of in that tank.
Can petrol be taken from your diesel at the forecourt?
Pumps are where the work usually kicks off, and where a big portion of that closes. Still at Esso? Then that is normally where it happens. Station forecourts are normal for us, with the consent of the site.
Nowhere other than a garage can this be halted with the engine still cold. Our engineers can still deal with it where it sits, even away from the forecourt. In a car park, on a driveway or in a lay-by, your car has been fired up and moved there, and that pulled fuel through your filter and into the high-pressure fuel pump, right from the tank. None of that is a disaster, although the flush then has to go past the tank to the fuel lines and your filter, and the few seconds between checking the receipt and reaching for your key are what decide that.
Away from the petrol pump, the next customer can get through — so yes, let the staff help you push it. Very much worth it. Cranking the car just for four car lengths? No.
Will we serve your corner of Winchester?
Winchester is a cathedral city, so we are out to the town and to the villages by it on the same journeys: The Close, The Soke, Wharf Hill, Highcliffe and Hyde.
If yours is not on this list it doesn't mean we do not come — there are pages for most towns across Hampshire, and the ones named above are simply the immediate neighbours. Guessing is the habit to avoid, particularly on a boundary or anywhere your phone goes wrong. Ring us and enquire.
The map shows the area this page includes. The lot is ground our engineers work: a kerbside, a forecourt, a driveway, a car park. You do not bring your vehicle anywhere.
Stranded on the roadside near Winchester
Not everybody gets a chance to stop somewhere sensible. Hazards flashing at a lay-by somewhere, or pulled onto the verge on Colebrook Street because you realised after setting off — our technicians take that call so often that it's the normal kind.
Out of the car while it isn't wise to be inside, by it if it is. Don't fire it up to get to a better spot. It'll go — a diesel on petrol normally obliges — and each mile of obliging pulls that mix deeper into the fuel system. However inconvenient the location, it's no problem for us to get to it, and that's far better for the car than carrying on.
Driven it already? Pull over, and check this
This is where your Winchester Bypass counts, under a mile from Winchester. Some way along, and onto it in the first place: a misfuelled diesel will frequently do both before anything feels wrong. What you get then is rarely a tidy stop. Power ebbs away, the idle gets lumpy, and there may be some smoke.
Take the first exit that is sensible, stop there, and do not start it to move it. Long trip? Anything near the under 15 miles to the closest city and you should presume the lot — filter, pump, injectors, all of it got to by the contamination. Say that on the phone, because it alters what goes in the van.
Winchester itself
Winchester is a historic city situated on the River Itchen in Hampshire, with a low elevation of around 38 metres above sea level. Winchester sits in close proximity to Southampton, approximately 11.6 miles away, and is surrounded by nearby areas such as The Close, The Soke, and Wharf Hill. Winchester has a population of around 47,049 people, predominantly residing in terraced housing. Winchester is located about 59.7 miles from London, making it a significant urban centre in the South East region.
When we reach you around Winchester: what follows
- Three things get checked before any quote — the fuel that was put in, the quantity, and if anything has been run since. Each answer alters the work.
- We drain that tank of all the tainted fuel.
- Fuel lines are cleaned through and the filter cleaned, leaving nothing in your system that created any of this.
- Priming follows, once fresh diesel is in.
- Our engineers turn it on and confirm it runs correctly on new diesel.
That leaves your car ready to drive away. Our engineers do all of it wherever the car has ended up, which means it never has to be taken to a garage, and if it has been spotted early, it's very uncommon for there to be long-term damage.
AdBlue in your diesel tank instead, in Winchester?
AdBlue rather than petrol? Then the opening rule is unchanged — the motor stays off — while this issue beneath it's a distinct one altogether. Petrol does two things to diesel: dilutes it, and strips out the lubrication your fuel system relies on. Urea in water, AdBlue, and in a diesel tank that leads to rust and residue.
AdBlue removal around Winchester has a page of its own with the full story on it, including why it's often the more significant of the two. Our engineers deal with both.
How much is a petrol-in-diesel fuel drain around Winchester?
What changes the price is set out below, since this job isn't one job and our engineers can't frankly put a single number on this page.
- This is the main one: whether the motor has been started, or driven.
- How much of the wrong fuel went in, compared with how much the tank takes.
- Which got in: unleaded or AdBlue.
- Where the vehicle is, and whether our van can sensibly get to and work on it.
Tell us your vehicle, the quantity and if it has run, and you will get a clear answer instead of a range. Not pressing, with your car at home and going nowhere? Then is fine.
Questions our engineers hear about petrol in diesel in Winchester
Can you do a fuel drain at a petrol station in Winchester?
Yes, and it's where a large portion of this work takes place. Tell us which one you're at when you phone and we'll tell you if our engineers can work there. With the owner's agreement our engineers work at BP and the other forecourts nearby regularly.
Is there a sensible quantity of petrol in a diesel?
Whether the motor has run matters a lot more, though the ratio matters too, rather than the litres. Five litres in a nearly empty tank is a different matter from five in a full one — but either way, the thing that decides how much work is required is whether that mix has been sucked through the fuel system.
Already driven it with petrol in your diesel? What then?
Somewhere safe, then stop, then turn off and keep it off. Not restarting it is the single most valuable thing available to you now. Driving does shift the issue out of your tank and into your pump and injectors, yes, and it remains salvageable far more frequently than people expect.
Fuel drains and manufacturer warranties
No. Carried out properly, draining and purging is no modification at all, and the warranty from your manufacturer is untouched by it. A dispute over a warranty is likelier to come from running a diesel on petrol — so leave it turned off.
Two-stroke oil in the tank, and then home?
Two-stroke oil solves a separate problem, and an old one at that. Nothing it does puts back what petrol thinned. No. Your pump still has to cope with it, as the tank still has petrol in it afterwards.
Does petrol in a diesel have to go to a main dealer?
Wherever the vehicle is, our technicians drain and clean it there, so a trip to the main dealer does not come into it.
Is your car still with you?
Turned off is how it stays.
Driven it already? Then somewhere sensible, stop, switch off, and no restarting it after that. Cold, stationary, going nowhere: that's the best place to be in. Drivers fear this a lot more than they need to.
Throughout Hampshire and in Winchester: on-site fuel draining, at home or on the forecourt or at the kerbside.