Should You Worry? Petrol in a Diesel Car in Rufford
If it hasn't been started, worry less than you likely are. Till your ignition primes the pump, your starter turns, or your car is driven, petrol in a diesel tank just rests there and does no harm. Which means the honest reply to that first Rufford query — "have I ruined it?" — normally no. Leave the motor off and call Petrol in Diesel — that is how you keep it like that. The rest of this page covers what petrol really does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you a second time.
Petrol in a diesel: what does it do to your engine?
Passing through a motor, diesel is doing two jobs at once. Lubricating comes before burning; it does both. What stops the surfaces inside the high-pressure fuel pump and the injectors from wearing against each other is your diesel flowing through them — they are designed to extremely fine clearances.
The second job petrol doesn't do at all, and the first it does badly. A pump running on a petrol blend is wearing itself out, because petrol is runnier than diesel and takes away the lubrication the fuel system relies on. Petrol is also made to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that is where the rattling comes.
Combined, those make the shape of the trouble plain. It's circulation that causes the damage, not contact. All a tank with petrol in it amounts to is a fuel problem. Whatever a worn pump sheds goes on, borne by the fuel, into the injectors downstream, which is why a pump that has worked on the petrol is where a mechanical issue begins.
Four situations we see in Rufford: how serious is petrol in a diesel?
Fuelled but never started — the best it gets. Just that tank has petrol in it, and so the job is emptying your tank and purging the fuel system where your car stands. This scenario can only really take place at a forecourt: anywhere else, the vehicle got there by being driven.
Ignition on, or started for a moment. With your system primed, your lines and filter now hold petrol that came from the tank. That's usually still a simple task — a drain, a flush, and your filter seen to.
Those few miles on the road meant your pump running on fuel diluted by petrol throughout. How hard your car was driven matters as much as how far, and the work takes in that tank, the lines, the filter and clean fuel through the whole circuit. The school run to Rufford CofE School is one matter. Driving as far as Preston, under 10 miles away, makes a very different task — as does any distance on the M6, under 10 miles from Rufford, with the engine running hard the whole time.
Driven on until it protested — knocking, smoke, a lumpy idle, a soft throttle. The fuel is not behaving like diesel any more, and your engine is saying so. Stop where you are — on the verge on Thornton Close, at the kerb, down a side road — and do not move it. The drain and flush still come first, and they deal with it: if a car is pulled over soon, lasting damage is very uncommon.
What Rufford people get told about petrol in a diesel — and the stories in it
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 mix. That guidance presumes a diesel fuel system tolerates petrol by percentage. It does not.
If anything, the opposite holds. Myth: "A newer diesel can cope with a bit of petrol." More precise components and higher pressure are the way a current diesel runs its fuel, and that makes the protection matter more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. The motorist of a petrol motor fed diesel normally stops, since it will not run, and the harm stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile your pump grinds. Being able to run is not the same as being fine.
An old workaround for a different fault is behind this one. Myth: "Add some two-stroke oil and drive it home." What petrol has thinned remains weakened, and the petrol stays in the tank regardless.
Myth: "Drain your tank yourself and you are sorted." After the engine has been run, some of that petrol is no longer in the tank: it is in your filter and your lines, and it goes right back through your pump on the next start. On top of that, petrol emptied into a can by the road is truly risky.
Why petrol in a diesel takes place so easily
Nobody does it on purpose, and it's seldom carelessness. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol motor at all. The forecourt makes it easy, and the slip runs one way.
When habit and the car stop matching, it takes place. Any motor that's new to you — a hire car, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. The pumps in a different order on a familiar forecourt. Rushing for a train outside the nearest station and fuelling up en route. Precisely the moment it happens: after years of driving petrol, a driver fills a diesel Ford Focus for the first time. Throw in rain, a phone call or a back seat full of children, and your hand does what it has always done.
How to avoid petrol in a diesel on your next fill-up in Rufford
- Check the 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.
- Many cars state the fuel type inside your filler flap or on the cap, so check there on the first fill in any vehicle you do not know.
- Label the key. In a home with one of each, a coloured fob or a sticker on your 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" out loud. Silly, yes, yet it does the trick.
- Put the phone away. This is an easy mistake to make whilst you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices are available for cars without one. They are a safety net, not a reason to stop checking the pump.
- As soon as you realise, stop: less petrol in the tank means a weaker blend. What to do next does not change, though — still don't fire it up.
Put petrol in a diesel in Rufford already?
Then the order of things is brief. Do not switch your ignition on, and don't fire it up. If you are still at the forecourt — R. Sephton & Son or anywhere else — ask the staff to help you roll it clear of the pump. Call 0333 366 0103 next, with three answers — your fuel, the approximate quantity, and whether it's run.
If it was AdBlue and not petrol, say so. That's a different issue — corrosion and deposits rather than lost lubrication — and it has its own page for Rufford.
Rufford petrol in a diesel tasks: why one costs more than another
An honest single price does not exist here: four scenarios, four separate tasks. What shifts your cost is chiefly which of them you're in. The ratio counts next, meaning how much of that tank is petrol, followed by the location of the car and whether getting to it is safe for our van.
Three queries come first, before quoting, rather than after — what was put in, how much, has it run — and that is the reason. The answers change a range into a straight figure.
About Rufford, for a moment
Rufford is a village in Lancashire, situated on the banks of a river at a low elevation of around 17 metres. Rufford lies near the villages of Holmeswood, Mawdesley, and Sollom, and is approximately 9.9 miles from Preston. Rufford has a population of around 821 people, predominantly living in detached houses. Rufford is located in the North West region of England, about 185.3 miles from London.
Across Lancashire and around Rufford: fuel drain cover
Our teams answering petrol in diesel call-outs in Rufford, in the L postcode area, equally work the spots near it, Holmeswood, Mawdesley and Sollom among them. A forecourt, a supermarket car park, a lay-by or your own drive are all locations we drain, and your vehicle doesn't need to move to us.
Still at the petrol pump in Rufford?
Nothing beats it: that is where you now are. Keep it off. Call.