Jackson Bridge: Petrol in a Diesel Car? How Worried to Be
Probably less than you are now — as long as no one has started the vehicle. Until your ignition primes your pump, the starter cranks, or your car is driven, petrol in a diesel tank simply sits there and does no harm. Which makes the honest reply to the first Jackson Bridge query — "have I ruined it?" — normally no. Petrol in Diesel is who to ring, with your engine kept off, so it stays that way. The rest of this page sets out what petrol really does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you a second time.
Inside the motor: what petrol in a diesel really does
Diesel has two tasks on its way through an engine. It lubricates first, and only then does it burn. Built to very fine gaps, the injectors and your pump depend on the diesel moving through them to keep their surfaces from wearing against one another.
Badly at the first, not at all at the second: that's petrol. The rattling comes from petrol being made not to ignite when compressed, which is precisely the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection the fuel system depends on, and any pump working on that mix is wearing itself.
The shape of the issue is plain once you put those together. Contact does not do the harm — circulation does. Any tank with petrol in it is a fuel issue. A pump that has been running on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors downstream.
Jackson Bridge, petrol in a diesel: four cases, from mild to significant
The best case there can be: filled up, never started. The petrol is in your tank and just the tank, and the task is a drain and a flush where the car stands. This is the one scenario that can only really occur at a forecourt, since anywhere else the vehicle has been driven to get there.
A brief spell of running, or just the ignition on. With the fuel system primed, your lines and filter now hold petrol that came from that tank. Usually nothing more than draining, purging and sorting your filter, and so still simple.
Those few miles on the road were the pump running on fuel weakened by petrol the whole way. The work is the tank, the fuel lines, the filter and clean fuel through the entire system, and how hard the vehicle was driven matters as much as how far. Short trips, such as the school run to Scholes (Holmfirth) Junior & Infant School, are one matter. A run as far as Wakefield, under 15 miles away, is a very different task. So is any distance on the Outlane Interchange, under 10 miles from Jackson Bridge, where your engine has been labouring hard throughout.
Driven on till it protested — clattering, smoke, an uneven idle, a soft throttle. The motor is telling you your fuel is no longer behaving like diesel. Whether it's the verge on Scholes Road, a lay-by or a side road, stop there and leave it. A vehicle pulled over soon very rarely has lasting damage, since the drain and the flush-through, which still come first, deal with it.
Petrol in a diesel stories Jackson Bridge drivers hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Topping up removes nothing; it gives you a fuller tank of the same mix. Percentage isn't how a diesel fuel system copes with petrol, whatever that guidance assumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. A current diesel runs its fuel through more precise components at higher pressure, which makes the lubrication matter more, not less.
"It starts, it drives, so there is no harm" — the myth that catches more motorists than any other. The motorist of a petrol motor fed diesel normally stops, because it will not run, and the harm stops with them. A diesel fed petrol generally starts, ticks over and drives away as though nothing has happened, whilst the pump grinds. Running does not mean fine.
Myth: "Add some two-stroke oil and drive it home." It is an outdated workaround for a different fault. It does not put back what petrol has diluted, and that petrol is still in your tank after that.
The next start sends petrol back round the pump out of your lines and your filter, where some of that ends up after the engine has run. That is why draining the tank yourself doesn't sort it — a myth. And, a can of petrol drained by the kerbside is truly risky.
Why petrol in a diesel takes place so easily
It is seldom carelessness, and no one does it on purpose. The forecourt makes it easy: the petrol nozzle is the smaller of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle generally won't go into a petrol motor at all. So the mistake runs one way.
When routine and your car stop matching, it takes place. A new vehicle, a hire car or a courtesy car. One petrol and one diesel on the driveway of the same household. Your normal forecourt, its pumps now in a different order. A train to catch, and a hurried fill en route to Brockholes. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver accustomed to petrol: precisely when it takes place. With rain, a call arriving, or a car full of children to deal with, the hand simply does what it has always done.
How to prevent petrol in a diesel on your next fill-up in Jackson Bridge
- Green for unleaded and black for diesel is usual in the UK — but not on each forecourt. Trust the label on the pump, not the colour.
- Plenty of vehicles state the fuel inside your filler flap or on the cap, so check it on the first fill in any car you do not know.
- A coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember, for a household with one of each.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump. It seems silly and it does the trick.
- While you are thinking about something else, this is an easy mistake to make — so put your phone away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices are available for motors without one. They are a backstop, not a reason to stop reading the petrol pump.
- Noticing it halfway? Stop there and then. A thinner mixture results from less petrol inside that tank, but your next stage remains the same: do not fire it up.
Already put petrol in a diesel around Jackson Bridge?
Short and simple, then, is the order of things. Starting it is out, and so is turning on the ignition. The staff on the forecourt — whether at Murco itself or wherever you filled up — will usually help push it away from the pump if you ask. Next, 0333 366 0103. We'll ask what got in, roughly how much, and if it has been run.
If it was AdBlue rather than petrol, say so. That's a different fault — corrosion and deposits rather than lost protection — and it has its own page for Jackson Bridge.
One petrol in a diesel task in Jackson Bridge costs more than another. Why?
The four scenarios above are four separate jobs, so no single quote for this would be fair. Which of them you're in is mostly what moves the cost. Where the vehicle is matters too, and whether a technician can safely get to it, after the ratio of petrol to what your tank holds.
That's why our engineers ask three questions before costing instead of after: what got in, how much, and if it has run. Their replies are what turn a range into one firm number.
About Jackson Bridge itself
Jackson Bridge is a small village in West Yorkshire, situated on the riverside at an elevation of 188 metres. Jackson Bridge has a mix of old and new housing, with terraced properties being the predominant type, and is located near other local places such as Scholes and Hepworth. Jackson Bridge is close to Wakefield, which is 13.4 miles away, and is about 157.6 miles from London.
Jackson Bridge and West Yorkshire: where our fuel drain cover reaches
The teams answering petrol in diesel calls around Jackson Bridge, in the HD postcode area, also work the places around it, Scholes, Hole Bottom and Hepworth among them. You need not move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
Jackson Bridge: still at the petrol pump?
No position is better: that is where you now are. Keep it off. Ring.