Should You Worry? Petrol in a Diesel Car in Dedridge
If it has not been started, worry far less than you probably are. Everyone in Dedridge starts with "have I ruined it?", and the fair answer is usually no: petrol resting inside the tank of any diesel stays harmless till priming, cranking or driving draws it into the system. Petrol in Diesel is who to ring, with the engine left off, and so it remains that way. Below, you will find what petrol really does inside a diesel, how far it might have got, and how to stop it happening to you again.
What petrol in a diesel does to your engine
Two jobs fall to diesel on its route through a motor. It lubricates to begin with, and only then does it burn. Built to extremely fine gaps, the injectors and the pump rely on your diesel moving through them to keep their surfaces from wearing against one another.
Of those two jobs, petrol manages the first poorly and the second never. It's thinner than diesel and takes away the lubrication your fuel system depends on, so a pump running on a petrol blend is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the rattling comes from.
Combined, those leave the shape of the trouble clear. The harm is done by circulation, not by contact. Where the petrol is only in your tank, it's a fault of fuel, nothing more. Whatever a worn pump sheds travels on, carried by the fuel, into your injectors downstream, which is why a pump that has worked on that petrol is where a mechanical fault begins.
Four situations we see in Dedridge: how bad is petrol in a diesel?
Fuelled but not once started — the best it gets. On a forecourt, and really only there, the petrol is still limited to the tank — because everywhere else the car was driven to reach it. The job is draining and rinsing on the spot.
A moment's running, or merely your ignition on. With your system primed, your lines and filter already hold petrol that has come from that tank. Still normally straightforward: drain, flush, and the filter dealt with.
Some miles driven, and the pump has spent every one of them working on thinned fuel. Distance is only half of that; how hard it was driven counts just as much. Either way this work includes your tank, your lines, the filter and clean fuel through the whole circuit. A school run to the local primary school is one thing. Very different a second time: a trip to Dunfermline, under 15 miles away, or some miles on the M8, under 3 miles from Dedridge, where your engine kept running hard.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. That is the engine telling you its fuel no longer is behaving like diesel. Pull up on the spot — on the verge on Nigel Rise, at the kerb, down a side road — and do not move it. Permanent damage is very unusual if a vehicle is pulled over quickly, and the fuel drain and flush-through that still come first deal with it.
What Dedridge people get told about petrol in a diesel — and the myths in it
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing is removed when you top up — the tank just carries more of the same blend. Percentage isn't how a diesel fuel system copes with petrol, however much that guidance supposes.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." Protection counts more on newer diesels, not less, since their fuel passes through smaller components at higher pressure.
Myth: "If it starts and drives, there's no harm done." This is the one that fools motorists. The motorist of a petrol engine fed diesel normally has no choice but to stop, because it will not run, and the harm stops with them. A diesel fed petrol normally starts, ticks over and drives away as though nothing has happened, while your pump wears. Being able to run isn't proof of being fine.
Myth: a two-stroke additive lets you to drive home. It is an old workaround, meant for another fault. None of what petrol thinned gets put back by it — and afterwards, that tank still contains that petrol.
"Drain it yourself and you are sorted" — a myth, since after it's been running some petrol sits in the filter and lines, ready to go right back through your pump at your next start. Emptying petrol into a can by the kerbside is also truly hazardous.
How does petrol in a diesel take place?
Nobody does it on purpose, and it is seldom carelessness. The forecourt makes it easy: the petrol nozzle is the smaller 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 car at all. So the error runs one way.
The moment routine stops matching your car is the moment it happens. A new motor, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. The pumps in a different order on a well-known forecourt. A train to catch, and a rushed fill en route to Livingston South. Years of petrol cars behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that's when. With rain, a call arriving, or children to deal with, your hand simply does what it always has.
Avoiding petrol in a diesel next time you fill up around Dedridge
- The label is what matters, and so read the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, but not on each forecourt.
- The first fill in an unfamiliar car is the time to check the filler flap — inside it, or on the cap, many vehicles state which fuel they take.
- Good intentions count for less than a sticker or a fob in a vivid colour on the diesel's key if a home has one of each. So label it.
- Before the nozzle comes off the pump the first time you fuel a hired or new vehicle, say "diesel" aloud. Daft, yes, yet it does the trick.
- Tuck the phone away. This is an easy mistake to make while you're thinking about something else.
- Some diesels come with a filler designed to block a petrol nozzle, and devices you can add are available for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the pump.
- The moment you realise, stop: less petrol in your tank means a weaker mixture. What to do next doesn't change, though — still do not crank it.
Already put petrol in a diesel around Dedridge?
Short and simple, then, is the order of things. Starting it is out, and so is switching on your ignition. If you are still at the forecourt — Asda or anywhere else — ask the attendants to help you roll it away from the petrol pump. What was put in, about how much, and if it's run: tell us that when you phone 0333 366 0103.
Corrosion and deposits form the issue with AdBlue, where petrol brings lost protection. So if it was AdBlue, say so — and see its own Dedridge page.
Dedridge petrol in a diesel jobs: why one costs more than another
A fair single quote doesn't exist here: four situations, four separate tasks. Which of them you're in is mostly what moves the cost. Next it's the ratio — how much petrol got in against how much your tank takes — and after that where the car is and whether our van can get to it safely.
Ahead of any quote, not after, we ask three queries: the fuel that went in, its volume, and whether it's run. That's why. Those answers are what change a range into one firm number.
About Dedridge itself
Dedridge is a suburban area situated on the riverside in West Lothian, with a mix of terraced housing and local amenities. Dedridge sits at an elevation of 133 metres, near the Almondvale and Livingston areas, and is approximately 13 miles from Dunfermline. Dedridge has a population of around 4455 people and is part of the wider West Lothian community. Dedridge is located near Adambrae and other local neighbourhoods.
Fuel drain cover across West Lothian, Dedridge included
Dedridge sits in the EH postcode area, and the teams that answer petrol in diesel jobs there work the places near it as well — Almondvale, Livingston and Adambrae among them. A forecourt, a supermarket car park, a lay-by or your own drive are all places our technicians drain, and the car doesn't need to come to us.
In Dedridge and still at the pump?
Then you're in the best place there can be. Switched off it stays; then call.