Brome Street: Petrol in a Diesel Car? How Worried to Be
Not started? Then less anxious than you likely feel. Petrol sitting in a diesel tank does nothing to your motor till something pulls it through the system — the ignition priming your pump, your starter, or driving on its own. So the honest answer to the first query everyone in Brome Street asks, "have I wrecked it?", is generally no. Leave the motor off then phone Petrol in Diesel — that is how you keep it that way. What petrol really does to a diesel, how to gauge how far it's gone, and how to stop it from happening a second time: that is the rest of this page.
Petrol in a diesel: what does it do to your engine?
Diesel does two jobs on its way through a motor. Before it ignites, it lubricates — then it combusts. Your high-pressure pump and the injectors are designed to extremely fine gaps, and your diesel passing through them is what keeps those surfaces from wearing down against each other.
Badly at the first, not at all at the second: that is petrol. Being less viscous than diesel, petrol strips out the lubrication a fuel system needs, so a pump on the blend to wear itself. It is equally made to resist igniting under compression — the opposite of what a diesel needs — which is why you hear the clattering.
Put those together and the shape of the issue is plain. Contact does not do the harm — movement does. A tank with petrol in it is a fuel problem. The beginning of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds travels on with the fuel to the injectors beyond it.
Brome Street, petrol in a diesel: four situations, from mild to major
Filled up, and not started: no case is better. Only that tank has petrol in it, and so the task is draining that tank and flushing the system where the car sits. This scenario can only truly take place on a forecourt: anywhere else, your car got there by being driven.
Started for a moment, or just the ignition on. Once primed, your system has drawn petrol out of the tank as far as the fuel filter and your lines. Drain, flush, see to your filter: still usually easy.
Driven a few miles. Now the pump has spent those miles labouring on weakened fuel. The work is your tank, the lines, the filter and fresh fuel through the entire circuit, and how hard the car was driven counts as much as how far. On the school run to Scole Church of England Primary Academy, the mileage is short. Driving as far as Norwich, under 25 miles away, makes a very different task — as does any mileage on the M11, under 50 miles from Brome Street, with the engine running hard all the way.
Driven on until it complained — clattering, smoke, a ragged idle, a soft throttle. What you are hearing is your motor signalling fuel that no longer behaves like diesel. Leave it where it has stopped: a lay-by, a quiet street, the verge on The Street. A vehicle stopped early very seldom has permanent damage, since the fuel drain and the flush, which still go first, sort it out.
What Brome Street people get told about petrol in a diesel — and the myths in it
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing is removed by topping up — you're left with a fuller tank, still the same mix. A diesel fuel system does not tolerate petrol by percentage in the way that advice assumes.
If anything, the opposite is true. Myth: "A modern diesel can cope with a bit of petrol." A newer diesel runs its fuel through more precise components at higher pressure, which makes the lubrication matter more, not less.
This is the one that catches motorists. Myth: "If it starts and drives, there is no harm done." Feed diesel to a petrol motor and it normally won't run, so the motorist stops — and the damage stops with them. A diesel fed petrol usually starts, ticks over and drives away as if nothing has happened, while the pump grinds. Fine and running are not the same at all.
Myth: "Add some two-stroke oil and drive it home." It is an outdated workaround for a different fault. That petrol is still in the tank afterwards, and whatever it has thinned isn't put back.
Myth: "Drain your tank yourself and you are sorted." After the motor has been run, some of that petrol is no longer in that tank: it is in the fuel filter and your lines, and it goes right back through the pump on the next start. Clearing petrol into a can at the kerbside is also really hazardous.
Petrol in a diesel: how does it occur?
Carelessness is seldom the cause, and nobody means to do it. A diesel nozzle generally won't go into a petrol vehicle, yet the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake simple, and just in one direction.
The moment habit stops matching the car is the moment it takes place. Any motor that is new to you — hired, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps laid out differently. A train to catch, and a rushed fill on the way to Diss. Years of petrol cars behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. With rain, a call arriving, or a car full of children to deal with, your hand just does what it always has.
Brome Street people: how to avoid petrol in a diesel next time
- The label is what counts, and so check the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- Plenty of cars state the fuel type inside your filler flap or on the cap, so check it on your first fill in a motor you don't know.
- Mark the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- Before the nozzle comes off the petrol pump the first time you fuel a hired or new motor, say "diesel" out loud. Silly, perhaps, yet it works.
- Put the phone away. This is an easy mistake to make whilst you're thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to reject a petrol nozzle, and add-on devices are available for the remainder. Count it as a backstop, then keep checking the petrol pump.
- Less petrol makes a thinner blend, and so stop as soon as you realise — though remembering that the next step is unchanged. It is still not to fire it up.
Put petrol in a diesel around Brome Street already?
The order of things is short, then. Starting it is out, and so is turning on the ignition. The attendants on the forecourt — whether at Gulf Oil itself or wherever you filled up — will usually help roll it clear of the pump if you ask. What went in, about how much, and whether it has run: tell us those when you ring 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate issue — Brome Street has a page just for it.
Brome Street petrol in a diesel jobs: why one costs more than another
Four different tasks sit behind the four situations above — which is why there is no honest single price. Chiefly, the cost moves with which one you are in. Two things come after that: the petrol that was put in as a proportion of what the tank takes, then the spot your car is in and whether a technician can get to it safely.
Ahead of any quote, not after, we ask three questions: the fuel that was put in, the amount, and if it's run. That's why. A range becomes a straight figure once those replies are in.
About Brome Street
Brome Street is a small village in Suffolk, situated inland at an elevation of 43 metres, with a mix of detached homes and rural landscapes. Brome Street lies near the villages of Oakley and Brome, and is approximately 20 miles from Norwich. Brome Street remains a quiet residential community with a population of around 562 people. Brome Street is also within commuting distance to larger cities, being about 80 miles from London.
Across Suffolk and around Brome Street: fuel drain cover
Oakley, Oakley Park and Brome are among the spots around Brome Street that the same teams work, answering petrol in diesel calls across Brome Street's IP postcode area. Our engineers drain wherever the vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Brome Street: still at the pump?
Then, you couldn't be in a better place. Phone, and keep it turned off.