Petrol in a Diesel Car in Llanrwst: How Worried Should You Be?
Likely less than you are now — provided nobody has started it. Till the ignition primes your pump, the starter cranks, or the vehicle is driven, petrol in a diesel tank just waits there and does no harm. Which means the honest reply to that first Llanrwst query — "have I ruined it?" — usually no. Keep it like that: leave your motor off and phone Petrol in Diesel. The rest of this page covers what petrol actually does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you a second time.
The engine and petrol in a diesel: what happens
Diesel does two tasks on its way through a motor. It protects to begin with, and after that does it burn. Designed to extremely fine tolerances, your injectors and your pump depend on the diesel flowing through them to stop their surfaces wearing against one another.
The second job petrol does not do at all, and the first it does poorly. The rattling comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips out the lubrication your system depends on, and any pump running on that blend is wearing itself.
Taken together, they show what shape the problem takes. Not contact but movement is what causes the damage. Petrol in the tank is a fuel problem. Whatever a worn pump sheds goes on, borne by the fuel, into the fuel injectors further along, which is why a pump that has worked on the petrol is where a mechanical problem starts.
Llanrwst, petrol in a diesel: four situations, from mild to serious
The best case there is: filled up, not once started. The petrol is inside the tank and just the tank, and the task is a drain and a flush where the car stands. This is the one situation that can only truly take place at a forecourt, as anywhere else the car has been driven to get there.
A brief spell of running, or just your ignition on. The fuel system has been primed, so petrol has left your tank and got to your filter and your lines. Still normally straightforward: drain, flush, and the filter sorted.
A couple of miles driven, and the pump has spent every one of them labouring on weakened fuel. Tank, lines, filter, then fresh fuel put through the whole circuit: that is the work, and the way your car was driven counts as much as the miles. The school run to the local primary school is one thing. Very different a second time: a trip to Bangor, under 25 miles away, or any distance on the Moreton Spur, under 50 miles from Llanrwst, where the motor never stopped running hard.
Driven on until it complained — rattling, smoke, an uneven idle, a dead throttle. That's the engine telling you its fuel has stopped behaving like diesel. Stop on the spot — on the verge on Heol Ddinbych, at the kerb, down a side road — and don't move it again. A car pulled over quickly very rarely has lasting damage, because the drain and the flush-through, which still come first, sort it out.
Stories Llanrwst motorists hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It does not. A bigger tank of the same mix is all it gives, since topping up takes out nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice assumes.
Not so: a modern diesel copes with a bit of petrol. Rather, the opposite. More precise components and higher pressure are how a newer diesel runs its fuel, and that makes the lubrication count more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that fools people. The driver of a petrol motor fed diesel normally has no choice but to stop, because it will not run, and the harm stops with them. Feed petrol to a diesel and it usually starts, ticks over and drives away like nothing happened — all while its pump is wearing. Fine and running aren't the same at all.
Myth: "Add some two-stroke oil and drive the car home." It's an old workaround for a different issue. The petrol is still in the tank afterwards, and what it has diluted is not put back.
Myth: "Drain the tank yourself and you're sorted." Once the engine has been run, some of that petrol is no longer inside your tank: it's in your filter and the lines, and it goes right back through the pump at the next start. Besides, petrol cleared into a can by the road is truly dangerous.
How does petrol in a diesel take place?
Nobody does it on purpose, and it's seldom carelessness. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly won't fit a petrol vehicle. That's how the forecourt makes it easy.
When routine and your car stop matching, it occurs. A new motor, a hire car or a courtesy car. Two motors on one driveway, one petrol, one diesel. A forecourt you know, only with its pumps arranged differently. A train to catch, and a rushed fill en route to North Llanrwst. A new-to-you diesel Renault Megane, its first fuelling, and a motorist used to petrol: exactly when it takes place. Add rain, a phone call or a back seat full of kids, and the hand repeats what it has always done.
Llanrwst motorists: how to prevent petrol in a diesel next time
- A green handle for unleaded and black for diesel is normal in the UK — but not on each forecourt. Trust the label on the petrol pump, not the colour.
- Check your filler flap. Plenty of cars state the fuel type inside the flap or on the cap. Look at it on the first fill in a car you do not know.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of intending to remember, for a house with one of each.
- It sounds silly and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away and keep your mind on the petrol pump.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to reject a petrol nozzle, and aftermarket devices are available for the remainder. Count it as a backstop, then keep reading the petrol pump.
- Spotting it mid-fill? Stop there and then. A weaker mix follows from less petrol inside the tank, but the next step stays the same: don't start it.
Petrol already in a diesel around Llanrwst? Begin here
Then the order of things is short. Starting it is out, and so is turning on your ignition. The staff at the forecourt — whether at Texaco itself or wherever you filled up — will usually help roll it away from the pump if you ask. What went in, about how much, and whether it has run: tell us those when you phone 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a separate fault — Llanrwst has a page just for it.
Why one petrol in a diesel job around Llanrwst costs more than another
Four separate tasks lie behind the four scenarios above — which is why there's no fair single price. Chiefly, your cost shifts with which one you are in. The share counts next, meaning how much of the tank is petrol, followed by the position of the vehicle and whether reaching it is safe for a van.
Three questions come first, before any quote, rather than after — what went in, how much, has it run — and this is the reason. The replies change a range into a straight figure.
About Llanrwst
Llanrwst is a town situated on the banks of the River Conwy in north Wales, with a population of around 3128 people. Llanrwst has a mix of housing types, but semi-detached homes are the most common, and the town's elevation is approximately 15 metres above sea level. Llanrwst is located near several smaller communities, including Pentre-tafarn-y-fedw, Llanddoged, and Llanrhychwyn, and is about 15 miles from the city of Bangor. Llanrwst is also relatively distant from London, at around 191.6 miles away.
Across Conwy and in Llanrwst: fuel drain cover
Llanrwst waits in the LL postcode area, and our teams that answer petrol in diesel jobs there work the locations near it as well — Pentre-tafarn-y-fedw, Llanddoged and Llanrhychwyn among them. You need not bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations we drain.
Still at the petrol pump around Llanrwst?
Then you are in the best place there is. Keep it off. Ring.