How Worried Should You Be? Petrol in a Diesel Car in Lyndhurst
Provided it has not been started, you can worry less than you likely are. Everyone in Lyndhurst starts with "have I wrecked it?", and the honest answer is usually no: petrol resting in your tank of a diesel stays harmless till priming, cranking or driving draws it into the system. Keep it like that: leave the engine off and phone Petrol in Diesel. Below, this page sets out what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
What petrol in a diesel does to the engine
Passing through an engine, diesel does two jobs at once. It protects to begin with, and after that does it burn. Designed to extremely fine tolerances, your injectors and your pump depend on your diesel flowing through them to keep their surfaces from wearing against one another.
The second job petrol doesn't do at all, and the first it does poorly. It's runnier than diesel and strips away the protection your fuel system rests on, so a pump running on a petrol blend is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the clattering comes from.
The shape of the problem is plain once you put those together. Contact does not do the harm — circulation 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 your injectors downstream.
Lyndhurst, petrol in a diesel: four cases, from mild to significant
Fuelled but never started — the best it gets. That petrol is in your tank and only the tank, and the job is a drain and a flush where the vehicle stands. This is the one situation that can only truly occur at a forecourt, since anywhere else the car has been driven to get there.
Ignition on, or started for a moment. With your system primed, your lines and filter already contain petrol that has come from your tank. Usually little more than emptying, rinsing and seeing to your filter, so still easy.
Driven a few miles. Now the pump has spent those miles working on thinned fuel. How hard your car was driven counts as much as how far, and this work covers the tank, your lines, the fuel filter and fresh fuel through the whole system. Short trips, such as the school run to Harlow Green Community Primary School, are one matter. A run as far as Newcastle upon Tyne, under 5 miles away, is a very different job. So is any distance on the A1(M), under 3 miles from Lyndhurst, where the motor has been labouring hard throughout.
Driven on till it complained — clattering, smoke, an uneven idle, a dead throttle. That's the engine telling you its fuel no longer is acting like diesel. Whether it's the verge on Wetheral Gardens, a lay-by or a side road, stop there then leave it. What comes first is still the fuel drain and flush-through, and that takes care of it, with permanent damage very rare if a vehicle is pulled over soon.
Myths Lyndhurst motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing is removed by topping up — you are left with a fuller tank, still the same mixture. Percentage isn't how a diesel fuel system tolerates petrol, however much that advice assumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. Finer parts and higher pressure are how a newer diesel runs its fuel, and that makes the protection count more, not less.
"It starts, it drives, and so there is no harm" — the myth that trips up most drivers than any other. Diesel in a petrol motor generally means a motor that won't run: the motorist stops, and so does the harm. A diesel fed petrol normally starts, idles and drives away as though nothing has happened, whilst your pump wears. Fine and running are not the same at all.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct problem. It does not put back what petrol has diluted, and the petrol is still in the tank later on.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol lies in the filter and lines, waiting to go straight back through your pump at the next start. On top of that, petrol drained into a can by the road is genuinely hazardous.
Petrol in a diesel: how does it happen?
Nobody does it on purpose, and it's rarely carelessness. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol vehicle at all. The forecourt makes it simple, and the mistake runs one way.
When habit and the vehicle stop matching, it occurs. A new motor, a hire car or a courtesy car. One petrol and one diesel on the driveway of the same household. The pumps in a different order on a well-known forecourt. A train to catch, and a rushed fill on the way to Heworth. Precisely the moment it takes place: after years of driving petrol, a driver fills a diesel Volkswagen Golf for the first time. Throw in a back seat full of children, a phone call or rain, and the hand wins.
Next time you fill up in Lyndhurst: avoiding petrol in a diesel
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most generally do. Check the petrol pump's label; the colour is just a clue.
- Inspect your filler flap. Plenty of cars state the fuel inside the flap or on the cap. Look at it on the first fill in any car you don't know.
- Good intentions do less than a sticker or a fob in a vivid colour on your diesel's key if a household has one of each. So mark it.
- "Diesel", aloud, before you pick up the nozzle — every time a new or hired car gets its first tank. It sounds daft. It works.
- Mistakes like this are straightforward to make whilst your mind is on something else, and so your phone goes away.
- Some diesels come with a filler designed to block a petrol nozzle, and devices you can add are available for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Less petrol means a thinner mixture, so stop as soon as you notice — though remembering that the next stage is unchanged. It's still not to start it.
Lyndhurst: already put petrol in a diesel?
In that case, there's only a short order of things. Do not start the car, and do not switch the ignition on. The attendants on the forecourt — whether at JET itself or wherever you filled up — will normally help push it away from the petrol pump if you ask. Then call 0333 366 0103 and tell us what was put in, about how much, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a different fault — Lyndhurst has a page just for it.
One petrol in a diesel job around Lyndhurst costs more than another. Why?
There's no honest single price for this, because the four scenarios above are four different jobs. Mostly, the cost shifts with which situation you're in. Two things come after that: the petrol that got in as a proportion of what the tank takes, then the spot the car is in and whether our van can get to it safely.
What went in, how much, and whether it has run — three questions our engineers ask before costing, not after, for precisely that reason. The answers change a range into a straight figure.
About Lyndhurst itself
Lyndhurst is a suburban area located in Tyne and Wear, England, sitting approximately 111 metres above sea level. Lyndhurst is positioned near the city of Newcastle upon Tyne, about 3.6 miles from the city centre, and is surrounded by other nearby places such as Harlow Green and Beacon Lough. Lyndhurst has a population of around 6303 people and predominantly features semi-detached housing. Lyndhurst is situated inland, about 243.9 miles north of London.
Lyndhurst and Tyne and Wear: where our fuel drain cover runs
Our teams answering petrol in diesel call-outs around Lyndhurst, in the NE postcode area, equally work the spots around it, Harlow Green, Beacon Lough and Allerdene included. The car doesn't need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
At the petrol pump around Lyndhurst, right now?
Then you're in the best position there can be. Keep it turned off, then ring.