Lyme Regis: Put Petrol in a Diesel Car?
If you have not turned on the motor yet, do not. A drain and nothing else is almost always what a car needs while the fuel is still inside your tank and your engine has not yet been started, which is why it's the next few minutes that count, not how much went in. Petrol in Diesel comes to the vehicle wherever it has stopped in Lyme Regis or the remainder of Dorset, on the forecourt, at the roadside or on a private drive, and drains and cleans it there. Contact us before all else begins, and you will hear what comes after that.
Now what? Petrol in a diesel, in order
- Never fire it up. Turned on anyway? Then do not rely on it. Diesel in a petrol motor normally won't run, so the motorist stops and the wear ends with them. Petrol in a diesel? It starts. It ticks over. It moves off happily, for several miles. Drivers get that reversed. It's not fine — that fuel system is wearing every mile you drive.
- Leave the car's ignition off also. Diesel performs two jobs: it combusts, and before it burns it protects the injection pump and its injectors. Petrol manages the first and not the second. Flicking the ignition on is frequently sufficient to prime that system, which moves the petrol out of your tank then into exactly those components.
- Topping up takes out nothing. It hands you a bigger tank of the same mix, because a diesel fuel system doesn't cope with petrol by percentage in the way that guidance suggests — so don't tip diesel on top to water down it. Type is irrelevant too: super unleaded is petrol.
- Stay put if it's sensible to. Hazards on, ignition off, leave it. Wherever you have stopped — the verge on Broad Street, anywhere — an odd spot for us beats a started engine, and nothing is easier for us to deal with than a vehicle that never moved.
- Check where you are before ringing. A postcode beginning DT7 3, and the name of whatever is next to you. Otherwise the technician circles instead of arriving.
- Phone 0333 366 0103. Tell us what went in, roughly how many litres, plus whether the car has run. Those three answers shape the full job.
Do not take it home. Petrol-thinned diesel has run through your high-pressure pump in real volume on the road in, and the way back would roughly double that for nothing at all. Phone us — the platform is fine. There's no need to stand over that Skoda Octavia outside Axminster while the work gets done, and we'd far rather talk to you tonight than learn on Monday.
How far, and how hard? The second of those matters more than the first, so have both prepared. Your Mercedes C-Class will have seemed entirely ordinary on the way back from St Michael's CofE Primary School, Lyme Regis — they all do, and that is the trap. Diesel into a petrol motor generally will not run at all: the motorist stops, and so does the damage. Petrol into a diesel fires up, idles, drives off like nothing happened, whilst the high-pressure fuel pump gets on with its work minus the protection your fuel should be giving it. No warning arrives, because behind the wheel nothing looks wrong.
Your Audi A3 remains where it is in the car park by The Volunteer Inn for the whole job, which usually goes like this. First we ask what went in, roughly how much, and whether the engine has run since, because much of the work depends on those answers. The tank is emptied of the contaminated mixture, the lines are cleaned, and the filter comes off if it's a replaceable one. With new diesel in and the system bled, the vehicle is fired up and tested, and once it's running correctly you set off.
Here's the entire mechanism. Diesel needs enough body to seal the tight gaps it goes through, and petrol takes that away. That is it. Which explains the usual Langmoor Gardens call — a diesel BMW 1 Series, out there without a murmur and back down on power, rough at idle, maybe a bit of smoke. Injection systems work hydraulically as well as chemically, and so your fuel has to hold pressure and not just burn; weakened, it bleeds past those gaps rather than building, and delivery comes poorer, later, less even than the motor was engineered around. Not a failing motor, though. Fuel that has stopped behaving like diesel. Put that right and it stops.
The fuel filter, the fuel lines, the pump and the rail: that's where that blend is once a diesel has run, and it does not come back out with that tank contents. So that tank isn't where most of the damage rests by this point, and a diesel Volvo XC60 that made it near Lyme Regis Library needs your system flushed rather than cleared.
Removing petrol from your diesel at a forecourt
Much of the work starts at a pump, which means a large chunk of it gets done on site. Still at Murco? Then that's usually where it gets done. Station forecourts are normal for us, with the consent of the owner.
Nowhere else other than the forecourt can it be halted with the engine still unstarted. Our technicians can still sort it out where it stands, even away from the pumps. In a car park, on a driveway or in a lay-by, your car has been started and driven there, and that pulled fuel through your filter then into your high-pressure pump, right from that tank. None of that is a catastrophe, though the flush then has to reach past that tank to the lines and the fuel filter, and the few seconds between checking the till receipt and reaching for the keys are what determine that.
Away from the pump, the next motorist can get through — so yes, let the staff help you wheel the vehicle. Worth doing. Rolling the car four bays doesn't justify starting the engine.
Will our engineers serve your side of Lyme Regis?
These same runs take us to Cobb, Ware, Dragons Hill, Uplyme and Holcombe besides Lyme Regis, which is a coastal town.
Our engineers still come. Those places above are only the immediate neighbours, and a page exists for most places around Dorset, and so an absence from the list is not an absence from the coverage. Guessing is the thing to resist, above all on the boundary or anywhere your satnav struggles. Phone to check.
The ground this page spans sits on the map. Our technicians work by the road, at forecourts, on driveways and in car parks across all of it, and your vehicle doesn't need to move to us.
Kerbside stops across Lyme Regis
Not everyone gets a suitable place to pull in. Set off, then twigged? Finished up on the verge on Pound Street, or sat in some lay-by with your hazards on? That is a routine call here. Not a rare one.
Whether you stay beside the motor or keep away from it hangs on whether being in it is wise. Never start up the motor to nurse the vehicle somewhere safer — a diesel running on petrol will often oblige, and every mile it obliges for is pulling the blend further into your fuel system. We'll take our van to an inconvenient spot without any fuss, and for the car that is far better than carrying on.
Petrol in a diesel, and your car has rolled
Here is where your M5 comes in — under 25 miles away from Lyme Regis. A misfuelled diesel will frequently take you onto it and some distance along before anything feels wrong, and the symptoms when they appear are usually lost power, a lumpy idle and smoke rather than a neat stop.
The next sensible junction is the one to take. Switch off there, then leave the restarting alone. Suppose the worst of it on a long trip. Anything near the under 50 miles to the closest city, and the petrol has been through the fuel filter, through your pump, through the fuel injectors. Mention it when you ring. What our engineers bring differs.
Lyme Regis itself
Lyme Regis is a coastal town in south Dorset, situated on the English Channel coast at an elevation of around 32 metres. Lyme Regis lies near the Cobb, a historic harbour wall, and is close to the nearby settlements of Ware and Dragons Hill. Lyme Regis has a population of approximately 3741 people, predominantly living in detached housing. Lyme Regis is located 133.3 miles west of London and 26.1 miles southeast of Exeter.
What comes next when our engineers reach you in Lyme Regis
- The responses alter the work, which is why our engineers ask before giving a price: what went in, how much of it, and whether the motor has run.
- Your tank gets cleared of it.
- Lines flushed, filter cleared. Whatever remains after that isn't the thing that started the issue.
- Clean diesel goes in, and then the system gets primed.
- It is fired up with clean diesel in it, and we confirm that it is running smoothly.
That has it ready to drive away. There's no need for a garage at any point, as the work is all done where your car is, and when it is caught quickly, lasting damage is very uncommon.
AdBlue in the diesel tank by mistake, around Lyme Regis?
AdBlue rather than petrol? Then the first step is unchanged — the motor stays off — whereas the issue underneath it's a distinct one altogether. Petrol thins the diesel and strips the lubrication the fuel system depends on. Rust and deposits are what a diesel tank ends up with instead, because AdBlue is urea dissolved in water.
AdBlue removal around Lyme Regis has a page of its own with the details on it, including why it is often the more serious of the two. We deal with both.
Budgeting for a petrol-in-diesel fuel drain around Lyme Regis
What moves the price is listed below, as this job isn't one job and our engineers cannot honestly put a single number on this page.
- Has it been started or driven? Nothing else matters for as much.
- Wrong fuel in, against what your tank takes — that ratio.
- Whether it is petrol or AdBlue.
- Where is it? And can a technician reach it and work there safely?
The vehicle, the quantity, whether it has run — give us those and the answer comes back straight rather than as a range. For the vehicle at home that is going nowhere and is not urgent, is fine too.
Petrol in diesel queries from Lyme Regis drivers
At a petrol station in Lyme Regis, can you do a fuel drain there?
Plenty of what our engineers do happens nowhere else. So yes. Consent from the site is the condition. Given that, a forecourt like Harvest Energy is somewhere we are often enough, along with the rest of them locally — so name yours on the phone and you will hear whether working there is possible.
A few litres of petrol in a diesel — too much?
Litres aren't the measure. Proportion is, and much more than either, it matters whether anything has been run. What decides how much work is required is whether that mixture has been drawn through the fuel system — because even though five litres in an almost empty tank is a different situation from five in a full one, either way that's the query.
Petrol in my diesel, and I have driven the car
Turn off somewhere sensible, and keep it that way after you stop. Not restarting it is the single most helpful thing available to you now. Driving does move the problem out of the tank and into your pump and injectors, yes, and it remains fixable far more frequently than drivers assume.
Is a fuel drain going to void my warranty?
A manufacturer's warranty survives a drain and flush done to a proper standard, which is no alteration at all. Running a diesel on petrol is the thing more likely to cause an argument with one, which is another good reason to leave the car turned off.
Could I put some two-stroke in and just drive?
No. Two-stroke oil is an old remedy for a separate issue and it doesn't replace what petrol has weakened. Later on? 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?
There is no need to bring it to a main dealer, as we drain and clean the car wherever it is.
Still with the car?
Never switch the engine on again.
If you have already driven the vehicle, stop somewhere safe, switch it off then keep it off. This is recoverable from a lot more regularly than motorists assume, and a still, cold motor is the best place to be in.
Emptying misfilled vehicles, Lyme Regis and the rest of Dorset, wherever they are. Roadside. Forecourt. Home.