How Worried Should You Be? Petrol in a Diesel Car in Haxey
Far less than you probably are, provided it hasn't been started. Till the ignition primes your pump, the starter turns, or your car is driven, petrol in a diesel tank simply rests there and does no harm. Which means the truthful reply to that first Haxey question — "have I ruined it?" — usually no. Keep it that way: leave the motor off then phone Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and the way to make sure you don't do it again.
Inside the motor: what petrol in a diesel does
Two jobs fall to diesel on its journey round a motor. Oiling comes before burning; it does both. Extremely fine gaps are built into your injectors and the high-pressure fuel pump, and only your diesel flowing through keeps those surfaces from grinding together.
The second job petrol doesn't do at all, and the first it does badly. It is runnier than diesel and takes away the protection the system hinges on, 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 reverse of what a diesel needs from its fuel. That's where the knocking comes from.
Put those together and the shape of the trouble is plain. The damage is done by movement, not by contact. Where the petrol is only in your tank, it's a fault of fuel, nothing more. Whatever a worn pump sheds travels on, carried by your fuel, into the fuel injectors downstream, which is why a pump that has worked on that petrol is where a mechanical issue starts.
Haxey, petrol in a diesel: four situations, from mild to serious
Filled up, and never started: no case is better. The petrol is inside the tank and only the tank, and the task is a drain and a flush where the vehicle sits. This is the one scenario that can only truly happen on a forecourt, because anywhere else your car has been driven to get there.
A moment's running, or merely your ignition on. The system has been primed, and so petrol has left the tank and got to your filter and the lines. Still generally straightforward: drain, flush, and your filter seen to.
Those few miles driven were the pump labouring on fuel diluted by petrol the whole way. Mileage is only half of it; how hard it was driven matters equally. Either way this work includes the tank, your lines, the filter and fresh fuel through the whole system. Short trips, like the school run to Haxey Cofe Primary Academy, are one matter. Driving as far as Doncaster, under 15 miles away, makes a very different job — as does any distance on the M180, under 10 miles from Haxey, with the motor working hard the whole time.
Driven on until it complained — rattling, smoke, an uneven idle, a dead throttle. What you are hearing is your engine signalling fuel that no longer acts like diesel. Stop on the spot — on the verge on High Street, at the kerb, down a side road — and don't move it. Long-term damage is very rare when a car is stopped early, and the drain and flush that still come first deal with it.
Stories Haxey motorists hear about petrol in a diesel
Myth: topping up to full with diesel makes it fine. It does not. Nothing is removed by topping up — you're left with a bigger tank, still the same mix. Percentage is not how a diesel fuel system copes with petrol, however much that advice presumes.
"Newer diesels can handle a little petrol" — a myth, and nearer the opposite. At higher pressure, through smaller parts: that is how a newer diesel moves its fuel, and so the protection counts more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there is no harm done." Feed diesel to a petrol motor and it normally won't run, so the motorist stops — and the harm stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually does; meanwhile your pump wears. Fine and running aren't the same thing.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct problem. It doesn't put back what petrol has thinned, and the petrol is still in your tank later.
Once the motor has been run, part of that petrol sits in the filter and your lines, not the tank — and your next start sends it right back through the pump. So the myth "drain your tank yourself and you are sorted" doesn't stand up. Also, a can of petrol drained at the roadside is truly risky.
Petrol in a diesel: how does it happen?
A careless moment is rarely the cause, and no one means to do it. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol vehicle at all. The forecourt makes it simple, and the slip runs one way.
When habit and the vehicle stop matching, it takes place. Courtesy car, hire car, or a motor that's new. One petrol and one diesel on the drive of the same household. A forecourt you know, but with its pumps laid out differently. A rushed fill en route to Gainsborough Central with a train to catch. A new-to-you diesel Renault Megane, its first fuelling, and a driver used to petrol: precisely when it occurs. Throw in rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Avoiding petrol in a diesel next time you fill up around Haxey
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Read the petrol pump's label; the colour is only a hint.
- Check the filler flap. Plenty of cars state the fuel inside the flap or on the cap. Look at it on your first fill in any motor you do not know.
- Mark the key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. It sounds silly and it works.
- 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 come with a filler designed to block a petrol nozzle, and aftermarket devices exist for the remainder. Count it as a safety net, and keep reading the petrol pump.
- As soon as you realise, stop: less petrol inside that tank means a thinner mixture. What to do next does not change, though — still don't fire it up.
Already put petrol in a diesel around Haxey?
In that case, there's only a short order of things. Don't fire it up, and do not turn the ignition on. If you're still on the forecourt — the nearest petrol station or anywhere else — ask the attendants to help you roll the vehicle clear of the petrol pump. Ring 0333 366 0103 next, with three answers — your fuel, the rough volume, and if it has run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a different issue — Haxey has a page just for it.
One petrol in a diesel task in Haxey costs more than another. Why?
An honest single price does not exist here: four situations, four separate tasks. Which of them you're in is chiefly what shifts your cost. Where the car is counts too, and whether a van can safely get to it, after the ratio of petrol to what your tank takes.
That's why our technicians ask three questions before costing instead of after: what was put in, how much, and if it's run. Their answers are what turn a range into one firm number.
About Haxey and where it is
Haxey is a village in north Lincolnshire, situated in a low-lying area near the River Trent, with an elevation of around 16 metres. Haxey lies approximately 12 miles from Doncaster and is surrounded by nearby villages such as Graizelound, East Lound, and Westwoodside. Haxey has a population of around 1452 people, predominantly living in detached houses.
Fuel drain cover around Haxey and across Lincolnshire
Graizelound, East Lound and Westwoodside are among the locations near Haxey that the same teams work, answering petrol in diesel calls across Haxey's DN postcode area. You need not move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all places where we work.
In Haxey and still at the petrol pump?
In that case, you couldn't be in a better spot. Phone, and leave it turned off.