Petrol in a Diesel Car in Gloucester
If you have not started the engine yet, don't. A fuel drain and nothing else is almost always what a car needs while the petrol is still inside the tank and the engine has not yet been started, which is why it's the coming few minutes that count, not how much went in. Petrol in Diesel comes to the vehicle wherever it has come to rest in Gloucester or the rest of Gloucestershire, on the forecourt, at the roadside or on a driveway, and drains and flushes it there. Our team shall tell you what the following stage is. Call us — that comes ahead of anything else.
Your next five minutes: petrol in a diesel
- As you drive, the pump and the injectors wear. That's why you never fire it up, and why you never trust it once it has started. The catch about petrol in a diesel specifically — the part drivers get wrong — is that it drives away normally for the first mile or two. Diesel in a petrol engine generally cannot run at all, which stops the driver and stops the wear with them. This one lets you drive on.
- Diesel combusts, and before it ignites it greases — your high-pressure pump, those injectors. Petrol manages only the burning. So leave your ignition off as well: switching it on is usually enough to prime the system, and priming moves petrol from the tank into precisely those components.
- Don't water down it. Diesel poured on top takes out nothing, so all you have is more of what was already there, since percentage isn't how a diesel fuel system tolerates petrol. Super unleaded? Still petrol. The octane makes no difference.
- A motor that has never moved is the quickest one to deal with, and so stay where you are if you safely can. Stopped on the verge on Southgate Street? Hazards on, and keep the car there. An awkward place suits us better than a started motor.
- Find out where you are before calling. A postcode beginning GL1 1, and the name of whatever is closest to you. Otherwise our van circles rather than turning up.
- Ring 0333 366 0103. Let us know what was put in, roughly how much, and whether your car has run. Those three answers shape your whole job.
Phone us before you drive it. Petrol into a diesel Volkswagen Golf this morning, and the car outside the nearest station ever since? Then the wait has taken nothing from you: fuel in a tank is idle, and any harm happened on the trip in, when the pump was drawing diesel that petrol had diluted.
What we'll ask about is whether the drive there was short and cold, because that's where petrol is slowest to burn properly — and anything that doesn't burn can work past the rings then into the oil. Right up to the moment someone drives it home, a diesel Ford Kuga standing in the car park outside Robert Raikes House holding a tank of petrol in it is an easy job. Nothing degrades as it waits, so park it there overnight then phone next morning.
Here's the whole mechanism. Diesel needs enough body to seal the tight clearances it goes through, and petrol takes that away. That's it. Which accounts for the ordinary Brunswick Square call — a diesel Citroen C3, out there without complaint and back down on power, rough at idle, perhaps a bit of smoke. Injection systems work hydraulically as well as chemically, so the fuel has to hold pressure and not just burn; diluted, it escapes past those tolerances instead of building, and delivery comes weaker, later, less even than the engine was designed about. Not a failing engine, though. Fuel that has stopped acting like diesel. Put that right and it stops.
A motor you picked up two days ago gets driven further before anybody notices anything, which is the hire and courtesy issue in one sentence — and how far it went is what decides the amount of petrol getting to the fuel injectors. Nothing careless about the mistake itself: a modern diesel filler neck takes the slimmer petrol nozzle with practically no resistance, and so new places see most of these. Call us from wherever you are, near Saint Mary de Crypt or not, and we will come to the Peugeot 2008.
Drain it then put fresh diesel in — that is the suggestion you will get, generally from somebody sure of themselves, and it's half true. Do precisely that to a diesel Mercedes GLC by Gloucester Masonic Hall and it would start, which is what makes the tip sound sensible. What takes place next is the issue: the engine at once sucks the petrol still sitting in the filter and the feed lines straight back through your pump, because emptying a tank does nothing about fuel that has already left it. Ring us instead. We flush your system and take the filter off where the vehicle has a serviceable one, which is the difference between the vehicle being repaired and your car merely starting.
Removing petrol from a diesel at a forecourt
Most of this work begins at the pump, so a large chunk of it is completed there. Still at Esso? Then that's normally where it happens. Garage forecourts are routine for us, with the agreement of the site.
Before your engine has fired — a forecourt is the one setting it ends up spotted. Anywhere else — a car park, a driveway, a lay-by — your car was fired up and moved to get there, which means fuel was pulled from your tank, through your filter and into the high-pressure pump. That's not a disaster, and our engineers can still sort it out where it stands. It does mean your lines and the fuel filter need cleaning as well as that tank, and that's settled by the few seconds between checking the till receipt and going for the keys.
Clear of the pump, the next customer can get past — so yes, let the staff help you wheel the vehicle. Well worth it. Four vehicle lengths isn't worth a restart.
Service near Gloucester
Gloucester is a cathedral city, so we head out to it and to the places by it on those same runs: The Island, High Orchard, St Pauls, Pool Meadow and Kingsholm.
If yours isn't on the list that does not mean we never come — there are pages for the majority of locations across Gloucestershire, and the ones named above are merely the nearest neighbours. Phone and ask instead of presuming, above all when you're on a border or anywhere your satnav misreads.
The area the page spans sits on this map. Our technicians work by the road, at forecourts, on driveways and in car parks across all of that, and your car never needs to move to us.
Stopped on the roadside somewhere around Gloucester?
The opportunity to pull in somewhere sensible does not come to everyone. Hazards on in a lay-by somewhere, or stopped on the verge beside Longsmith Street because you noticed after setting off — our engineers take that call so often that it's the usual kind.
Clear of the car if it is not wise to wait in it, by it if it is. It will usually oblige. A diesel running on petrol limps along very willingly, and that is the catch: fire it up to reach somewhere handier and that mixture goes further into the fuel system with every mile travelled. Pressing on causes the vehicle far more harm than our van driving out to a difficult place, and that is no problem for us.
Driven it already? Pull in, and see below
under 3 miles out of Gloucester, the local M5 is what matters now. Some way along, and onto it in the first place: a misfuelled diesel will usually manage both before anything seems wrong. What you get then is seldom a tidy stop. Power falls away, the idle gets rough, and there may be some smoke.
Come off at the next sensible junction, switch off, and do not restart the car to move it. On a longer trip — anything near the under 25 miles to the closest city — assume the petrol has been through your filter, your pump and the injectors, and say so when you phone. It affects what our technicians bring.
Gloucester itself
Gloucester is a city located in the South West of England, situated on the banks of the River Severn at an elevation of around 25 metres. Gloucester sits near the intersection of several major roads and railways, approximately 94 miles west of London and 23 miles south of Worcester. Gloucester is a predominantly residential city with a mix of housing types, including semi-detached homes, and is surrounded by smaller neighbourhoods such as The Island, High Orchard, and St Pauls. Gloucester has a population of around 71,662 people.
What we do when our technicians get to you around Gloucester
- The answers change the work, which is why we ask before quoting: what got in, how much of it, and if your motor has run.
- The contaminated mixture is pulled out of the tank.
- Lines cleaned, filter cleaned. Whatever is left after that isn't the thing that caused the issue.
- We pour new diesel in and prime the system.
- It is run with clean diesel in it, and our technicians check that it's running smoothly.
At that point it is ready to pull away. There's no need for a garage at any point, as the work is all done where your car is, and when it's spotted early, lasting damage is very uncommon.
AdBlue in the diesel tank instead, around Gloucester?
Do not crank it: that opening rule applies whether what got in was AdBlue or petrol. What differs is this issue itself. Petrol does two things to diesel: dilutes it, and takes away the lubrication the fuel system depends on. AdBlue is urea dissolved in water, and in a diesel tank it leads to corrosion and residue instead.
Both are ours. There is a separate Gloucester page for AdBlue removal, with the detail on it — including the reasons it often turns out to be the worse of the two.
How much is a petrol-in-diesel fuel drain around Gloucester?
Truthfully, no single figure belongs on a page like this. The job varies. Here is what moves it:
- This is the key one: whether the motor has been run, or driven.
- Wrong fuel in, against what that tank takes — that proportion.
- Which went in: unleaded or AdBlue.
- Access: the car's position, and whether working on it there is sensible for our van.
Tell us what the vehicle is, how much got in, and whether the engine has run. A clear answer comes back, not a range. For the car at home that's going nowhere and is not time-critical, is fine too.
Petrol in diesel: frequent questions around Gloucester
At a petrol station in Gloucester, can you do a fuel drain there?
Yes, and it's where a large portion of this work gets done. Tell us which one you are at when you phone and we'll tell you if our engineers can work there. With the site's agreement we attend another forecourt nearby and the other forecourts locally all the time.
How much petrol is too much for a diesel?
It depends on the ratio rather than the litres, and far more on whether your motor has run. What settles how much work is required is whether that mix has been sucked through the system — because though five litres in a nearly empty tank is a separate case from five in a full one, either way that's the question.
I drove the vehicle after putting petrol in my diesel. What next?
Turn off somewhere sensible, then keep it that way after you stop. It's recoverable far more frequently than motorists assume, even though driving is what takes the trouble from that tank into your pump and injectors — and the single most useful thing you can do now isn't restart it.
Will a fuel drain void my warranty?
A drain then flush carried out correctly isn't a change and does not void a manufacturer's warranty. Running a diesel on petrol is the thing likelier to cause an argument with one, which is another good reason to leave the car switched off.
Can I just add two-stroke oil and drive home?
Two-stroke oil solves a distinct fault, and an old one at that. Nothing it does puts back what petrol thinned. No. After that? Still petrol in your tank, and a pump that has to live with the stuff.
Does petrol in a diesel have to go to a main dealer?
You do not need one. The car is drained and flushed wherever it is, with no need to bring it to a main dealer.
Still with your car?
The motor stays off.
Already driven it? Then stop somewhere safe, turn off, and let the car remain that way. Cold and still, a car is in the best position available — and people fear this far more than the recovery rate warrants.
Throughout Gloucestershire and around Gloucester: on-site fuel draining, at home or on the forecourt or at the kerbside.