Colyers: Put Petrol in a Diesel Car?
Petrol in Diesel drains and flushes misfuelled vehicles where they stand, on the forecourt, at the roadside or on a private drive, across Colyers and the rest of Greater London. The very first thing to do is not to fire up your engine. When the motor has not turned over and the fuel is still inside your tank, a tank drain is nearly always all it needs, and the following few minutes settle that, not how much went in. A single ring to us is sufficient: we will show you what follows from here. Do this first.
Petrol in a diesel: what to do now
- While you drive, the pump and your injectors wear. This is why you don't fire it up, and why you never depend on it once it has started. The thing about petrol in a diesel specifically — the bit motorists get wrong — is that it drives away normally for the first mile or two. Diesel in a petrol motor usually won't run at all, which stops the motorist and stops the wear with them. This one lets you keep going.
- Leave the ignition alone also. Diesel has two jobs: it combusts, and before it combusts it greases your injection pump and those injectors. Petrol does the first but not the second. Flicking the car's ignition on is commonly sufficient to prime the system, which pulls the petrol out of that tank and into just those parts.
- Never dilute it. Diesel tipped on top removes nothing, and so all you get is more of what was already there, since percentage isn't how a diesel fuel system tolerates petrol. Super unleaded? Still petrol. The type makes no difference.
- Our team would much rather drive to a tricky location than have it started — so if you sensibly can, sit tight. Nothing is easier to sort out than a car that hasn't moved. On the verge on Halstead Road, that means hazards on and leave the car.
- Get your whereabouts ready before you ring. A postcode that starts DA8 3 and whatever is next to you with a sign on it is the difference between the van showing up and our van circling.
- Ring 0333 366 0103. Let us know what got in, about how much, and also if the car has started. Those three facts shape your whole call-out.
The journey back would about double it, for no purpose at all. One commute has already put a real volume of petrol-thinned diesel through your high-pressure pump of your Renault Clio. So leave the car where it sits. Call us from the platform if that is quicker — no one needs you hovering over your car outside Slade Green while our technicians get on, and tonight trumps finding out on Monday.
A diesel pump meters fuel on demand, and a hurried morning run demands plenty — so three miles in the Audi A4 sounds like nothing and isn't. Twenty to nine at the gates of Fairford Academy Barnehurst, running late, the receipt in your hand showing unleaded: hazards on, motor off, ring us.
What we will ask is if the run there was short and cold, because that is where petrol is least able to burn fully — and anything that won't burn can get past the rings and into the sump. Right up to the moment somebody takes it home, a diesel Ford Focus parked in the car park outside Royal Oak holding a tank full of petrol in it is a straightforward job. Nothing degrades while it stands, so park the vehicle there overnight then call us in the morning.
Here's the whole process. Diesel needs enough body to seal the tight clearances it goes through, and petrol takes that away. That's it. Which explains the ordinary Howbury Lane Open Space call — a diesel Mercedes C-Class, out there without complaint and back down on power, uneven 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; weakened, it escapes past those clearances instead of building, and delivery comes poorer, later, less even than your engine was built around. Not a failing engine, though. Fuel that has stopped acting like diesel. Put that right and it stops.
Three things help when you call from near Northend Baptist Church: which side the filler is on, whether our van can pull up next to without blocking the road, and if the engine has run since you filled up. On-street is the usual location our technicians work, so the location itself is hardly ever the trouble — we would far rather deal with a cramped parking bay than with a vehicle that has been driven to somewhere more handy. We will drain the BMW 1 Series, change the fuel filter where there's a serviceable one, flush the lines and put clean fuel through the entire system, as by this point the worst of that is resting in your lines instead of in that tank.
Forecourt draining for petrol in a diesel
Most of this work starts at a pump, meaning a large share of it ends up done at one. The drain normally takes place on the spot. Still on the forecourt at Shell? Given the owner's agreement, that is a place our engineers work, and routinely.
Nowhere else other than a forecourt can it be halted with your engine still unstarted. We can still put it right where it stands, even away from the forecourt. In a car park, on a drive or in a lay-by, the car has been fired up and moved there, and that drew fuel through the filter then into your high-pressure pump, all the way from your tank. None of that is a disaster, although the flush then has to reach past that tank to the fuel lines and your filter, and the few seconds between seeing your receipt and reaching for the key are what determine that.
Staff will normally help out pushing it away from the petrol pump, which lets the next driver get through. Take the help. Four vehicle lengths isn't worth the risk.
Can we serve your corner of Colyers?
North End, Slade Green, Barnehurst, Erith, Northumberland Heath — every one of them on the runs that take us over to Colyers too, a residential suburb.
Not on the list? That says nothing. The places above are simply the nearest few, and the majority of places in Greater London have a page of their own elsewhere on our site. On a border, or somewhere your phone can't find? Ring us and check instead of presuming.
This map shows the patch this page spans. We work at the roadside, on forecourts, on driveways and in car parks over all of that, and your vehicle doesn't need to move to us.
Roadside breakdowns across Colyers
Not everyone gets a suitable place to stop. A normal call for us rather than an unusual one: noticed after setting off, finished up by the verge on Brendon Close or in a lay-by with your hazards on.
Sit with your car when it is wise to wait in it, yet out of it if it is not. Every mile a diesel obliges you for on petrol drags the mixture further into the system — and oblige it frequently will, which is why the engine does not get restarted to limp somewhere better. However difficult the location, it's no trouble for us to come to it, and that's far better for the car than pressing on.
So you've run it? Petrol in a diesel over a couple of miles
This is where the M25 comes in, under 5 miles from Colyers. A misfuelled diesel will frequently take you onto it and some distance along before anything seems wrong, while the signs when they come are normally lost power, a lumpy idle and smoke rather than a tidy stop.
Take the next exit that's safe, pull up there, and do not restart the car to reposition. Long trip? Anything close to the under 15 miles to the nearest city and you should assume the lot — filter, pump, injectors, all of that reached by the mixture. Say that on the phone, since it affects what goes in our van.
A little about Colyers
Colyers is a suburban area in south-east London, situated approximately 13.3 miles from central London and 11.9 miles from the city centre. Colyers is characterised by its semi-detached housing stock and lies near to other local areas such as North End, Slade Green, and Barnehurst. Colyers has a population of around 11521 people and is located at an elevation of 36 metres above sea level.
The call-out in Colyers, step by step
- Our technicians establish what got in, how much, and whether the engine has run. The replies alter the work, which is why we ask before giving a price.
- Our technicians drain your tank of all the contaminated fuel.
- What is left in the system should not be what caused the issue, and so your fuel lines get cleaned and the fuel filter cleaned.
- Priming follows, once fresh diesel is in.
- The engine is fired up and tested to make sure it runs correctly on new diesel.
After that it is ready to drive away. Permanent damage is very uncommon when it has been spotted soon, and because all of it is done where the car is, it never needs to be taken to a garage.
AdBlue in a diesel tank in Colyers is a distinct problem
Do not fire it up: that first instruction stands whether what got in was AdBlue or petrol. What changes is the problem itself. Petrol does two things to diesel: weakens it, and removes the protection your fuel system relies on. AdBlue is urea dissolved in water, and in a diesel tank it brings rust and deposits instead.
Usually the more significant of the two, AdBlue — and the detail lives on its own Colyers page. Both are ours to handle.
What a petrol-in-diesel drain costs around Colyers
Honestly, no single number belongs on a page like this. This job varies. Here's what moves it:
- Whether the engine has been started or driven. This is the main one.
- The tank's capacity, set against how much of the wrong fuel went into it.
- The sort of fluid in the tank, unleaded or AdBlue.
- Access: the vehicle's position, and if working on it there's safe for a technician.
A straight answer instead of a range is what you get for telling us three things: your car, the amount, and if it has run. If it is not urgent — the car is at home and going nowhere — is fine too.
Petrol in diesel: common queries in Colyers
Can you do a fuel drain at a petrol station in Colyers?
Plenty of what our engineers do happens nowhere else. So yes. Our engineers attend BP and the other forecourts nearby regularly, with the station's agreement — tell us which one you're at when you call and we'll tell you whether our technicians can work there.
Is there a safe quantity of petrol in a diesel?
Whether the motor has run matters a lot more, though the ratio counts too, rather than the litres. Five litres into a nearly dry tank isn't five into a full one, no. But both land on the same query in the end: has that mixture been sucked right through, or has it not?
Already driven it with petrol in your diesel? What then?
Turn off somewhere sensible, and keep it that way after you stop. Not restarting it is the single most useful thing available to you now. Driving does shift the problem out of that tank then into the pump and injectors, yes, and it remains recoverable far more regularly than drivers fear.
Fuel drains and manufacturer warranties
A manufacturer's warranty withstands a drain and flush done to a correct standard, which is no modification at all. A disagreement over a warranty is likelier to come from running a diesel on petrol — so leave it turned off.
Could I put some two-stroke in and just drive?
No. It belongs to a distinct problem from a bygone era, and petrol has thinned something no oil of that kind puts back. That tank still has petrol in it afterwards, and your pump still has to put up with it.
Main dealers and petrol in a diesel
Not at all. Our engineers drain and clean the vehicle wherever it is, so there is no need to take it to a franchised dealer.
Is the car still with you?
The motor remains off.
If you have already driven the car, pull over somewhere safe, switch it off and leave it off. A parked, cold car is the best place to be in, and this is recoverable from a lot more frequently than people expect.
Call-out fuel draining in Colyers and throughout Greater London — at the roadside, on the forecourt or at home.