Petrol in a Diesel Car in Mirfield: How Worried Should You Be?
If it hasn't been started, you can worry far less than you probably are. Till your ignition primes your pump, the starter cranks, or the vehicle is driven, petrol in a diesel tank just waits there and does nothing. Which makes the honest reply to that first Mirfield query — "have I wrecked it?" — usually no. Petrol in Diesel is who to ring, with the motor left off, so it remains that way. Further down, this page sets out what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you again.
The motor and petrol in a diesel: what happens
Passing through a motor, diesel is doing two jobs at once. It ignites, and before it burns it lubricates. Very fine gaps are built into the fuel injectors and your high-pressure pump, and just your diesel running through keeps those surfaces from grinding together.
The second job petrol doesn't do at all, and the first it does poorly. It is thinner than diesel and removes the protection your fuel system depends on, and so a pump running on a petrol blend is a pump wearing itself. And petrol is made to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That is where the rattling comes from.
Put these together and the shape of the issue is clear. Contact does not do the harm — circulation does. All a tank with petrol in it amounts to is a fuel issue. The start of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with your fuel to the injectors beyond it.
How bad is petrol in a diesel? Four situations our technicians see in Mirfield
Filled but not once started — the best it gets. The petrol is inside your tank and just that tank, and the task is a drain and a flush where your car sits. This is the one scenario that can only really happen on a forecourt, because anywhere else the vehicle has been driven to get there.
Started for a moment, or only your ignition on. Petrol has left the tank and reached the fuel filter and the lines, since your system has been bled. Normally little more than draining, flushing and sorting your filter, so still easy.
Your pump now spent a few miles on diluted fuel — that is what driving the vehicle meant. The work is the tank, the lines, the filter and fresh fuel through the entire system, and how hard the vehicle was driven counts as much as how far. On the school run to Hopton Primary School, the distance is short. A run as far as Wakefield, under 10 miles away, is a very different task. So is any mileage on the M62, under 3 miles from Mirfield, where the motor has been working hard throughout.
Driven until it protested. Clattering, an uneven idle, smoke, a throttle that has gone soft. The fuel isn't behaving like diesel any more, and the motor is telling you. Pull up wherever you are — the verge on Newgate, a lay-by, a side street — then leave the car where it is. A car stopped quickly very rarely has lasting damage, since the fuel drain and the flush, which still go first, take care of it.
What Mirfield people get told about petrol in a diesel — and the stories in it
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It won't. Topping up takes out nothing; it gives you a bigger tank of the same mixture. The idea behind the guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: a newer diesel copes with a bit of petrol. If anything, the opposite. At higher pressure, through finer parts: that is how a current diesel handles its fuel, so the protection matters more, not less.
"It starts, it drives, so there is no harm" — the myth that trips up most drivers than any other. The driver of a petrol engine fed diesel usually has no choice but to stop, since it will not run, and the damage stops there. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile your pump wears. Being able to run isn't the same as being fine.
Not so: a two-stroke additive lets you to drive home. It was an old workaround, meant for another problem. None of what petrol diluted gets put back by it — and later, your tank still contains the petrol.
The next start sends petrol back round the pump out of the lines and the fuel filter, where some of it sits once the motor has run. That is why a DIY tank drain doesn't leave you sorted — a myth. It's also really hazardous to drain petrol into a can at the kerbside.
Why petrol in a diesel occurs so easily
Carelessness is seldom the cause, and nobody means to do it. The forecourt makes it easy: the petrol nozzle is the slimmer of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle mostly will not go into a petrol vehicle at all. So the mistake runs one way.
The moment routine stops matching the vehicle is the moment it takes place. Courtesy car, hire car, or a motor that is brand new. Households running one of each, petrol and diesel. A forecourt you know, only with its pumps arranged differently. A rushed fill on the way to the nearest station with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Passat in front of you at the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of children, and the hand does what it has always done.
Mirfield motorists: how to avoid petrol in a diesel next time
- A green handle for unleaded and black for diesel is normal in the UK — yet not on every forecourt. Trust the label on the petrol pump, not the colour.
- In a vehicle you do not know, look inside the flap over the filler or at the cap before your first fill: plenty of motors print the fuel there.
- One of each in the household? Mark your key to your diesel — a coloured fob, a sticker — since meaning to remember is not enough.
- It sounds silly and it works: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump.
- Put your phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels come with a filler designed to block a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the petrol pump.
- Spotting it halfway? Stop there and then. A thinner mixture follows from less petrol inside that tank, yet your next step remains the same: do not start the car.
Already put petrol in a diesel around Mirfield?
The order of things is brief, then. Do not turn the ignition on, and don't fire it up. Ask the attendants to help you push it away from the petrol pump if you're still on the forecourt, whether that's Shell or anywhere else. What got in, roughly how much, and whether it's run: tell us that when you call 0333 366 0103.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a different problem — Mirfield has a page all for it.
What makes one Mirfield petrol in a diesel job cost more than the next
Four separate tasks sit behind the four scenarios above — which is why there is no honest single quote. What shifts your cost is mostly which of them you're in. After that it is the proportion — how much petrol was put in against how much your tank takes — and after that where the vehicle is and whether a van can reach it safely.
Three questions come first, before any quote, instead of after — what went in, how much, has it run — and this is the reason. A range becomes a straight figure once those replies are in.
About Mirfield, for a moment
Mirfield is a town in West Yorkshire, situated on the banks of the River Calder at an elevation of 54 metres. Mirfield lies approximately 8 miles from Wakefield and 163 miles from London, with nearby places including Littlemoor, New Scarboro, and Snake Hill. Mirfield has a population of around 14285 people, predominantly living in semi-detached housing. Mirfield is characterized by its riverside setting and mix of residential and industrial areas.
Fuel drain cover across West Yorkshire, Mirfield included
The teams answering petrol in diesel jobs in Mirfield, in the WF postcode area, also work the spots around it, Littlemoor, New Scarboro and Snake Hill among them. No need to move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all spots we drain.
In Mirfield and still at the petrol pump?
Then you're in the best spot there can be. Switched off it remains; then call.