How Worried Should You Be? Petrol in a Diesel Car in Hailey
Far less than you probably are, if it hasn't been started. Petrol resting in a diesel tank does nothing to the engine until something pulls it through your fuel system — your ignition priming your pump, your starter, or driving itself. So the honest answer to the first query anyone in Hailey asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to ring, with the engine left off, so it stays that way. Further down, you will find what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you again.
Petrol in a diesel: what does it do to the motor?
Passing through a motor, diesel is doing two jobs at once. Lubricating comes before burning; it does both. Your high-pressure pump and your injectors are made to very fine clearances, and the diesel passing through them is what keeps those surfaces from wearing against one another.
Of those two jobs, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips away the protection a fuel system needs, so a pump on that mixture wearing itself. It's equally made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the rattling.
Seen together, they show what shape the problem takes. It is circulation that causes the damage, not contact. Petrol in a tank is a fuel problem. The start of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds travels on with the fuel to the fuel injectors downstream.
Four situations our technicians see around Hailey: how bad is petrol in a diesel?
Fuelled up, not once started. The best case there is. Only your tank has petrol in it, and so the job is clearing the tank and flushing the system where your car stands. This scenario can only really take place on a forecourt: anywhere else, the vehicle got there by being driven.
Ignition on, or started for a second. Petrol has left the tank and got to the filter and the fuel lines, because the fuel system has been bled. Still generally easy: drain, flush, and the filter seen to.
Some miles driven, and your pump has spent every one of them labouring on weakened fuel. The work is the tank, the lines, your filter and clean fuel through the whole system, and how hard the vehicle was driven matters as much as how far. Driving the kids to Roselands Primary School is one kind of trip. Very different once more: a run to St Albans, under 15 miles away, or any miles on the M25, under 10 miles from Hailey, where the motor never stopped working hard.
Driven till it complained. Clattering, a lumpy idle, smoke, a throttle that has gone soft. That's the engine telling you its fuel no longer is behaving like diesel. Pull up where you are — on the verge on Ware Road, at the kerb, down a side road — and do not move it again. A vehicle stopped quickly very rarely has long-term damage, since the drain and the flush, which still come first, take care of it.
What Hailey motorists get told about petrol in a diesel — and the myths in it
False: topping up to full with diesel makes it fine. It doesn't. Topping up removes nothing; it gives you a bigger tank of the same mixture. The idea behind that guidance — that diesel fuel systems accept petrol by percentage — is wrong.
"Current diesels can handle a little petrol" — a myth, and closer to the reverse. Protection matters more on newer diesels, not less, since their fuel runs through smaller components at higher pressure.
This is the one that fools people. Myth: "If it starts and drives, there is no damage done." The driver of a petrol motor fed diesel usually stops, because it will not run, and the harm stops with them. Feed petrol to a diesel and it usually fires up, idles and pulls away as if nothing has happened — all the while its pump is wearing. Fine and running are not the same thing.
Not so: a two-stroke additive lets you to drive home. It was an old fix, supposed for another problem. What petrol has diluted stays diluted, and that petrol remains in that tank anyway.
Once the motor has run, part of the petrol sits in your filter and the fuel lines, not your tank — and your next start sends it straight back through the pump. So the myth "drain your tank yourself and you are sorted" doesn't stand up. And, a can of petrol drained by the kerbside is truly hazardous.
Petrol in a diesel: how does it occur?
On purpose? Never. Through carelessness? Rarely, if ever. The forecourt makes it simple: the petrol nozzle is the slimmer of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle mostly will not go into a petrol vehicle at all. So the mistake runs one way.
When routine and the vehicle stop matching, it takes place. Any motor that is new to you — a hire car, on loan as a courtesy car, or brand new. 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 en route to St Margarets (Herts). The first fill-up in a diesel Renault Clio after years of driving petrol is exactly the moment it takes place. With rain, a call arriving, or a car full of children to deal with, the hand just does what it has always done.
Preventing petrol in a diesel next time you fill up around Hailey
- The label is what counts, so read the pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- The first fill in a strange vehicle is the time to check your filler flap — inside it, or on the cap, plenty of motors state which fuel they take.
- Mark the key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- Before the nozzle leaves the pump the first time you fill a hired or new motor, say "diesel" aloud. Daft, perhaps, but it works.
- While you are thinking about something else, this is an easy mistake to make — so put your phone away.
- Some diesels come with a filler designed to reject 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 reading the pump.
- Noticing it mid-fill? Stop at once. A weaker mixture follows from less petrol in the tank, yet the next stage remains the same: don't fire it up.
Put petrol in a diesel around Hailey already?
In that case, there is only a short order of things. Starting it is out, and so is switching on the ignition. The attendants on the forecourt — whether at Gulf itself or wherever you filled up — will normally help push it clear of the petrol pump if you ask. What was put in, about how much, and if it's run: tell us that when you phone 0333 366 0103.
If it was AdBlue rather than petrol, say so. That is a different problem — corrosion and deposits instead of lost protection — and it has its own page for Hailey.
What makes one Hailey petrol in a diesel task cost more than the next
There's no honest single price for this, since the four scenarios above are four different tasks. What shifts the cost is mostly which of them you are in. The proportion counts next, meaning how much of your tank is petrol, followed by the position of the car and whether reaching it is safe for a van.
What was put in, how much, and whether it has run — three questions our engineers ask before costing, not after, for precisely that reason. With the answers, you get a straight figure rather than a range.
About Hailey itself
Hailey is a small village in Hertfordshire, situated inland at an elevation of around 48 metres, and is located approximately 19.4 miles from London. Hailey lies near several other settlements, including Woollensbrook, St Margarets, and Rye Park, and is about 14 miles from the city of St Albans. Hailey has a population of around 2386 people and is characterised by semi-detached housing. Hailey is a residential community with a mix of local amenities and rural surroundings.
Fuel drain cover across Hertfordshire, Hailey included
Petrol in diesel calls in Hailey — part of the SG postcode area — go to vans that also cover the places about it, Woollensbrook, St Margarets and Rye Park among them. A forecourt, a supermarket car park, a lay-by or your own drive are all locations we drain, and your vehicle does not need to move to us.
In Hailey and still at the pump?
The best spot there is, then — that's where you are. Keep it off. Ring.