Should You Worry? Petrol in a Diesel Car in Shirley
Not started? Then less anxious than you likely are. Until the ignition primes your pump, your starter turns, or your car is driven, petrol in a diesel tank just sits there and does no harm. Which means the truthful reply to the first Shirley query — "have I ruined it?" — normally no. Keep it that way: leave the engine off then call Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it's travelled, and how to stop it from happening a second time: that's the remainder of this page.
The engine and petrol in a diesel: what goes on
On its way through an engine, diesel has two tasks. Oiling comes before burning; it does both. What keeps the surfaces inside the high-pressure pump and the fuel injectors from wearing against each other is the diesel passing through them — they are designed to very fine clearances.
Petrol handles the first job poorly and the second not at all. It's runnier than diesel and strips away the protection the system depends on, and so a pump running on a petrol blend is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That's where the rattling comes from.
The shape of the issue is plain when you put those together. It's circulation that does the harm, not contact. Any tank with petrol in it is a fuel issue. 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 injectors beyond it.
Four situations we see in Shirley: how bad is petrol in a diesel?
Filled up, and never started: nothing beats it. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With that petrol held inside the tank alone, it's cleared and cleaned right where it stands, and nothing more is needed.
Ignition on, or started for a second. Your system has been primed, so petrol has left your tank and reached the fuel filter and the lines. Normally little more than draining, cleaning and sorting the filter, so still straightforward.
Your pump has spent a couple of miles on weakened fuel — that's what driving the vehicle meant. How hard the vehicle was driven counts as much as how far, and this work covers your tank, the lines, the fuel filter and clean fuel through the whole system. Driving the kids to St John's CofE Primary School is one sort of trip. Getting as far as Westminster, under 10 miles away, makes a very different job — as does any distance on the M25, under 10 miles from Shirley, with your engine running hard all the way.
Driven till it protested. Clattering, a ragged idle, smoke, a throttle that has gone soft. What you are hearing is the motor reporting fuel that no longer acts like diesel. Whether it is the verge on Upper Shirley Road, a lay-by or a side road, stop where you are then leave it. A vehicle stopped early very rarely has long-term damage, as the drain and the flush, which still come first, take care of it.
Petrol in a diesel stories Shirley people hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Nothing comes out when you top up — that tank just carries more of the same mixture. A diesel fuel system doesn't accept petrol by percentage in the way that guidance supposes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. Lubrication matters more on newer diesels, not less, because their fuel runs through smaller parts at higher pressure.
This is the one that fools motorists. Myth: "If it starts and drives, there is no damage done." Diesel in a petrol motor usually leaves a motor that will not run: the driver stops, and so does the damage. Whilst your pump wears, a diesel fed petrol normally starts, ticks over and drives away as though nothing has happened. Running isn't the same as fine.
Myth: a two-stroke additive lets you to drive home. It is an old workaround, supposed for another problem. None of what petrol diluted is put back by it — and later, that tank still contains that petrol.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol sits in the fuel filter and lines, ready to go right back through the pump on the next start. Also, a can of petrol filled by the roadside is truly dangerous.
Why petrol in a diesel takes place so easily
On purpose? Never. Through carelessness? Seldom, if ever. A diesel nozzle mostly will not fit a petrol car, but the smaller petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error simple, and only in one direction.
Habit and your car getting out of step is how it happens. A new motor, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. A forecourt you know, but with its pumps arranged differently. A train to catch, and a rushed fill en route to East Croydon. A new-to-you diesel Renault Megane, its first fuelling, and a motorist used to petrol: precisely when it occurs. With rain, a call coming in, or a car full of children to deal with, your hand just does what it has always done.
How to prevent petrol in a diesel on your next fill-up in Shirley
- Read the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on every forecourt. The label is what counts.
- The first fill in an unfamiliar vehicle is the time to check your filler flap — inside it, or on the cap, plenty of vehicles state which fuel to use.
- 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 label it.
- Before the nozzle leaves the pump the first time you fuel a hired or new motor, say "diesel" aloud. Daft, yes, but it does the trick.
- Whilst you are thinking about something else, this is an easy mistake to make — so put your phone away.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler built to refuse a petrol nozzle, and add-on devices are available for the remainder. Count it as a backstop, then keep reading the pump.
- Noticing it halfway? Stop there and then. A thinner blend results from less petrol in your tank, but the next stage stays the same: do not start it.
Shirley: already put petrol in a diesel?
Then the order of things is short. Leave it unstarted, with the ignition off too. The attendants at the forecourt — whether at BP itself or wherever you filled up — will usually help roll it clear of the pump if you ask. What was put in, about how much, and whether it has run: tell us that when you phone 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different problem — Shirley has a page all for it.
What makes one Shirley petrol in a diesel task cost more than the next
There's no honest single quote for this, since the four scenarios above are four different jobs. Which of them you're in is mostly what moves the cost. The proportion counts next, meaning how much of the tank is petrol, and then the location of the car and whether getting to it is safe for our van.
Ahead of any quote, not after, we ask three questions: your fuel that went in, its quantity, and if it has run. That is why. Those replies are what change a range into one firm number.
About Shirley
Shirley is a suburban area in southern Greater London, situated approximately 9.8 miles from central London and 9.3 miles from Westminster. Shirley sits at an elevation of around 77 metres, characterised by its predominantly semi-detached housing stock. Shirley is bordered by nearby places such as Upper Shirley, Addiscombe, and Spring Park, and has a population of around 3848 residents.
Shirley and Greater London: where our fuel drain cover reaches
Petrol in diesel jobs around Shirley — part of the CR postcode area — go to teams that likewise cover the spots about it, Upper Shirley, Addiscombe and Spring Park included. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots our engineers drain, and your vehicle doesn't need to move to us.
In Shirley and still at the pump?
In that case, you couldn't be in a better position. Switched off it remains; then phone.