East Wittering: Petrol in a Diesel Car? How Worried to Be
If it has not been started, worry less than you probably are. Till your ignition primes the pump, the starter cranks, or the vehicle is driven, petrol in a diesel tank simply rests there and does no harm. Which makes the honest reply to that first East Wittering query — "have I ruined it?" — normally no. Keep it like that: leave your motor off and ring Petrol in Diesel. The remainder 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 again.
What petrol in a diesel does to your engine
Passing through a motor, diesel is doing two things at once. Before it ignites, it lubricates — then it ignites. Very fine clearances are built into the injectors and the high-pressure fuel pump, and only your diesel flowing through stops those surfaces grinding together.
The second job petrol does not do at all, and the first it does poorly. A pump running on a petrol mix is wearing itself out, because petrol is runnier than diesel and takes away the lubrication your fuel system relies on. Petrol is also designed to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that's where any clattering starts.
Combined, those make the shape of the trouble clear. The harm is done by circulation, not by contact. Where the petrol is only in that tank, it is an issue of fuel, nothing more. The start of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with the fuel to the fuel injectors beyond it.
East Wittering, petrol in a diesel: four cases, from mild to major
Fuelled but not once started — as good as it gets. On a forecourt, and truly only there, the petrol is still confined to that tank — since anywhere else the car was driven to reach it. The job is draining and purging on the spot.
A moment's running, or merely your ignition on. Once primed, the fuel system has pulled petrol from your tank up to the fuel filter and the fuel lines. Usually nothing more than draining, flushing and sorting the fuel filter, so still straightforward.
Those few miles driven were the pump working on fuel weakened by petrol the whole way. Tank, lines, filter, then clean fuel put through the entire system: that's the work, and the way the car was driven counts as much as the miles. A school run to East Wittering Community Primary School is one matter. A run as far as Chichester, under 10 miles away, is a very different task. So is any distance on the Waterlooville Bypass, under 10 miles from East Wittering, where the motor has been running hard the whole time.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. What you are hearing is the engine signalling fuel that no longer runs like diesel. Stop on the spot — on the verge on Shore Road, at the kerb, down a side road — and do not move it again. A car pulled over early very rarely has long-term damage, since the drain and the flush-through, which still go first, sort it out.
East Wittering people and that petrol in a diesel stories they hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing is removed when you top up — the tank simply holds more of the same blend. A diesel fuel system does not accept petrol by percentage in the way that guidance presumes.
If anything, the opposite is true. Myth: "A modern diesel can cope with a bit of petrol." Protection matters more on modern diesels, not less, since their fuel runs through more precise components at higher pressure.
One myth that catches drivers out: if it starts and drives, it must be unharmed. Any petrol engine fed diesel generally won't run, and so the motorist stops and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile the pump wears. Being able to run isn't the same as being fine.
Myth: a two-stroke additive lets you to drive home. It is an old workaround, supposed for another problem. The petrol is still inside the tank afterwards, and what it has diluted isn't put back.
Myth: "Drain your tank yourself and you are sorted." Once the motor has run, some of that petrol is no longer in that tank: it's in the filter and the fuel lines, and it goes right back through your pump at the next start. And, a can of petrol filled at the kerbside is genuinely hazardous.
Why petrol in a diesel happens at all
It's seldom carelessness, and no one does it on purpose. The petrol nozzle is the slimmer of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol vehicle at all. The forecourt makes it simple, and the mistake runs one way.
When routine and your car stop matching, it happens. Hire cars, courtesy cars, and cars that are new to you. A household with one petrol and one diesel on the drive. A forecourt you know, only with its pumps arranged differently. Rushing for a train at Bosham and fuelling up en route. A new-to-you diesel Skoda Octavia, its first fuelling, and a driver accustomed to petrol: exactly when it occurs. Throw in rain, a phone call or a back seat full of children, and the hand does what it has always done.
How to prevent petrol in a diesel on your next fill-up in East Wittering
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most generally do. Check the pump's label; the colour is only a hint.
- Inspect your filler flap. Plenty of vehicles state the fuel type inside the flap or on the cap. Look at it on the first fill in any motor you don't know.
- Good intentions count for less than a sticker or a fob in a vivid colour on your diesel's key if a house has one of each. So label it.
- Before the nozzle leaves the pump the first time you fill a hired or new motor, say "diesel" out loud. Silly, yes, yet it works.
- Thinking about something else is when this becomes an easy mistake to make, so put your phone away then keep your mind on the petrol pump.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to block a petrol nozzle, and add-on devices exist for the rest. Count it as a backstop, then keep checking the pump.
- As soon as you realise, stop: less petrol in your tank means a thinner blend. What to do next doesn't change, though — still don't start the car.
Petrol already in a diesel in East Wittering? Begin here
The order of things is brief, then. Leave it unstarted, with your ignition off too. If you're still on the forecourt — Shell or anywhere else — ask the staff to help you roll it away from the pump. Then phone 0333 366 0103 and tell us what got in, roughly how much, and if it has run.
If it was AdBlue instead of petrol, say so. That's a separate fault — corrosion and deposits and not lost protection — and it has its own page for East Wittering.
Why one petrol in a diesel task around East Wittering costs more than another
Four separate tasks sit behind the four scenarios above — which is why there's no fair single quote. What moves the cost is chiefly which of them you're in. Two things come after that: the petrol that went in as a share of what the tank takes, then the place the vehicle is in and whether our van can reach it safely.
What got in, how much, and whether it's run — three queries we ask before pricing, not after, for exactly that reason. A range becomes a straight figure once those answers are in.
About East Wittering, for a moment
East Wittering is a coastal village in West Sussex, situated near the mouth of Chichester Harbour and close to the South Downs National Park. East Wittering has a population of around 2156 people and is characterised by its predominantly detached housing stock. East Wittering sits at a low elevation of approximately 3 metres above sea level, making it a popular spot for those who enjoy coastal walks and water sports. East Wittering is also near to other villages such as West Wittering and Bracklesham.
Fuel drain cover around East Wittering and across West Sussex
Petrol in diesel call-outs around East Wittering — part of the PO postcode area — go to teams that also cover the locations round it, West Wittering, Bracklesham and Earnley among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations we drain, and the car doesn't need to move to us.
East Wittering: still at the pump?
In that case, you couldn't be in a better place. Keep it off. Call.