Petrol in a Diesel Car in Flixton: How Worried Should You Be?
Unstarted? Then less worried than you probably feel. Until your ignition primes your pump, the starter turns, or the car is driven, petrol in a diesel tank simply rests there and does nothing. Which means the truthful reply to the first Flixton query — "have I ruined it?" — usually no. Keep it that way: leave your motor off then phone Petrol in Diesel. The rest 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 doesn't happen to you again.
What petrol in a diesel does to your engine
Diesel does two tasks on its way through an engine. It protects first, and only then does it burn. What stops the surfaces inside the high-pressure pump and the fuel injectors from wearing against each other is your diesel passing through them — they're built to very fine clearances.
Petrol handles the first job poorly and the second not at all. The knocking comes from petrol being made not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips away the lubrication your system rests on, and any pump working on such a mix is wearing itself.
Put these together and the shape of the problem is clear. The harm is done by circulation, not by contact. All a tank with petrol in it amounts to is a fuel issue. The beginning of a mechanical one is a pump that has been running on that petrol — and whatever a worn pump sheds moves on with your fuel to your injectors beyond it.
How bad is petrol in a diesel? Four situations our technicians see around Flixton
Filled up, and never started: nothing beats it. That petrol is in your tank and just the tank, and the job is a drain and a flush where the car sits. This is the one scenario that can only really happen on a forecourt, as anywhere else the car has been driven to get there.
Started for a second, or only the ignition on. Once primed, your system has drawn petrol from that tank up to your filter and the lines. That is generally still a simple task — a drain, a flush, and the fuel filter dealt with.
Those few miles on the road were the pump labouring on fuel thinned by petrol the whole way. How hard the car was driven counts as much as how far, and the work covers your tank, the lines, the filter and clean fuel through the entire system. A school run to Hertford Vale Church of England Voluntary Controlled Primary School, Staxton is one matter. A run as far as Kingston upon Hull, under 50 miles away, is a very different job. So is any distance on the Petuaria Way, under 50 miles from Flixton, where the motor has been running hard throughout.
Knocking, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The motor is telling you the fuel is no longer behaving like diesel. Stop where you are — on the verge on Main Street, at the kerb, down a side road — and do not move it again. The drain and flush-through still come first, and they take care of it: if a vehicle is pulled over soon, long-term damage is very unusual.
What Flixton people get told about petrol in a diesel — and the stories in it
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed by topping up — you're left with a fuller tank, still the same mix. The idea behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
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 passes through finer parts at higher pressure.
Myth: "If it starts and drives, there is no damage done." This is the one that fools people. Feed diesel to a petrol motor and it usually won't run, so the motorist stops — and the damage stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile the pump wears. Running isn't the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct problem. It doesn't put back what petrol has diluted, and that petrol is still in that tank afterwards.
The next start draws petrol back round the pump from the lines and the fuel filter, where some of it ends up after the engine has run. That is why draining your tank yourself does not sort it — a myth. Draining petrol into a can at the kerbside is also really hazardous.
How it happens: petrol in a diesel
It's seldom carelessness, and no one does it on purpose. A diesel nozzle mostly will not go into a petrol vehicle, but the slimmer petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error simple, and just in one direction.
The moment habit stops matching the car is the moment it takes place. Courtesy car, hire car, or a motor that's new. Two cars on one drive, one petrol, one diesel. A forecourt you know, but with its pumps arranged differently. A rushed fill en route to Seamer with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist 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.
Next time you fill up around Flixton: avoiding petrol in a diesel
- Read the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, yet not on every forecourt. The label is what counts.
- The first fill in an unfamiliar car is the time to check the filler flap — on it, or on the cap, many motors state the fuel to use.
- Good intentions count for less than a sticker or a fob in a bright colour on the diesel's key when a home has one of each. So mark it.
- Before the nozzle comes off the petrol pump the first time you fuel a hired or new vehicle, say "diesel" out loud. Silly, perhaps, yet it does the trick.
- Tuck the phone away. This is an easy mistake to make whilst you're thinking about something else.
- Add-on devices are available for motors without one, and some diesels come with a filler that won't accept a petrol nozzle. Helpful — but a safety net only, never a reason to stop checking the label.
- Noticing it halfway? Stop at once. A thinner blend follows from less petrol inside your tank, yet the next step stays the same: don't start the car.
Already put petrol in a diesel around Flixton?
Then the order of things is short. Never crank it, and don't switch your ignition on. The attendants at the forecourt — whether at Shell itself or wherever you filled up — will usually help roll it clear of the pump if you ask. Next, 0333 366 0103. We'll ask what got in, about how much, and if it's been run.
If it was AdBlue instead of petrol, say so. That is a separate issue — corrosion and deposits and not lost protection — and it has its own page for Flixton.
What makes one Flixton petrol in a diesel job cost more than the next
The four situations above are four different jobs, so no single price for this would be honest. The scenario itself does most of the work of moving the cost. Where your car is matters too, and whether a technician can safely reach it, after the ratio of petrol to what your tank takes.
Ahead of any quote, not after, we ask three questions: your fuel that got in, its volume, and if it has run. That is why. With the answers, there is a straight figure rather than a range.
About Flixton itself
Flixton is a small village in North Yorkshire, situated inland at an elevation of 48 metres, with Flixton being close to the nearby settlements of Flixton Ings, Folkton, and Staxton. Flixton has a population of around 526 people, with Flixton's housing stock predominantly comprising detached homes. Flixton is located approximately 31.7 miles from Kingston upon Hull and 186.5 miles from London.
Fuel drain cover across North Yorkshire, Flixton included
Petrol in diesel call-outs in Flixton — part of the YO postcode area — go to teams that also cover the places about it, Flixton Ings, Folkton and Staxton among them. A forecourt, a supermarket car park, a lay-by or your own drive are all locations our technicians drain, and the car does not need to move to us.
At the pump around Flixton, still?
No position is better: that's where you now are. Switched off it stays; then ring.