Should You Worry? Petrol in a Diesel Car in Phipps Bottom
Provided it has not been started, worry less than you probably are. Petrol sitting in a diesel tank does nothing to the motor till something draws it through the system — your ignition priming your pump, your starter, or driving itself. So the fair answer to the first question everyone around Phipps Bottom asks, "have I ruined it?", is normally no. Leave the motor off then phone Petrol in Diesel — that is how you keep it like that. The rest of this page sets out what petrol actually does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you a second time.
The engine and petrol in a diesel: what happens
Passing through a motor, diesel is doing two things at the same time. Oiling comes before burning; it does both. The high-pressure pump and your injectors are made to very fine clearances, and your diesel passing through them is what stops those surfaces from grinding against one another.
Of those two tasks, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump on that mixture to wear itself. It's equally made to resist igniting under compression — the opposite of what a diesel needs — which is why you get the rattling.
Put these together and the shape of the trouble is plain. The harm is done by movement, not by contact. Petrol in the tank is a fuel problem. The beginning of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with the fuel to your injectors downstream.
How serious is petrol in a diesel? Four situations our engineers see around Phipps Bottom
Filled but never started — the best it gets. Just that tank has petrol in it, and so the task is draining your tank and flushing the system where the vehicle sits. This scenario can only really happen on a forecourt: anywhere else, the vehicle got there by being driven.
A brief spell of running, or just your ignition on. The system has been primed, and so petrol has left that tank and got to the fuel filter and your lines. Usually nothing more than draining, cleaning and seeing to the filter, so still simple.
Your pump has worked a few miles on diluted fuel — that's what driving it does. How hard your car was driven counts as much as how far, and this work covers the tank, the lines, the fuel filter and clean fuel through the whole circuit. A school run to Pillowell Community Primary School is one matter. Any distance on the M5, under 10 miles from Phipps Bottom, means your engine working hard throughout, and a run to Gloucester, under 25 miles away, is a very different job too.
Driven on until it protested — knocking, smoke, a ragged idle, a soft throttle. That's the engine telling you its fuel no longer is acting like diesel. Stop wherever you are — the verge on High Delf Way, a lay-by, a side street — and leave it where it is. A vehicle pulled over early very rarely has lasting damage, as the fuel drain and the flush, which still come first, sort it out.
What Phipps Bottom motorists 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 when you top up — the tank simply carries more of the same blend. Percentage is not how a diesel fuel system tolerates petrol, whatever that guidance supposes.
Myth: a modern diesel copes with a bit of petrol. Rather, the opposite. Finer components and higher pressure are how a current diesel runs its fuel, and that makes the lubrication matter more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that fools motorists. The driver of a petrol engine fed diesel normally stops, since it will not run, and the damage stops with them. A diesel fed petrol usually starts, idles and drives away as though nothing has happened, whilst the pump wears. Fine and running are not the same thing.
An outdated workaround for a separate problem lies behind this one. Myth: "Add some two-stroke oil and drive it home." What petrol has weakened remains thinned, and the petrol stays inside your tank regardless.
Myth: "Drain your tank yourself and you are sorted." Once your engine has run, some of the petrol is no longer in the tank: it's in the fuel filter and your lines, and it goes straight back through the pump at your next start. And, a can of petrol drained by the kerbside is truly risky.
Why petrol in a diesel takes place so easily
On purpose? Never. Through carelessness? Seldom, if ever. A diesel nozzle generally won't fit a petrol motor, but the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error straightforward, and just in one direction.
The moment routine stops matching the car is the moment it occurs. Hire cars, courtesy cars, and cars that are new to you. A household with one petrol and one diesel on the drive. Your ordinary forecourt, its pumps now in a different order. Filling up in a rush en route to Lydney, with a train to catch. A new-to-you diesel Renault Clio, its first fuelling, and a driver accustomed to petrol: exactly when it happens. Your hand does what it has always done when you add rain, a phone call or a back seat full of children.
Preventing petrol in a diesel next time you fill up in Phipps Bottom
- Read the pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on each forecourt. The label is what counts.
- Plenty of motors state the fuel type inside the filler flap or on the cap, and so check there on the first fill in a car you do not know.
- Mark the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. It seems daft and it does the trick.
- While you are thinking about something else, this is an easy mistake to make — so tuck the phone away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to refuse a petrol nozzle, and add-on devices exist for cars without one. They are a safety net, not a reason to stop checking the pump.
- Spotting it mid-fill? Stop at once. A weaker mix results from less petrol in the tank, but your next step stays the same: don't crank it.
Put petrol in a diesel in Phipps Bottom already?
Short and simple, then, is the order of things. Don't crank it, and don't switch the ignition on. The staff on the forecourt — whether at Central Garage itself or wherever you filled up — will normally help push it clear of the petrol pump if you ask. Call 0333 366 0103 next, with three facts — your fuel, the rough amount, and if it's run.
Say so if it was AdBlue rather than petrol: it is a different issue, with its own page for Phipps Bottom, since AdBlue brings corrosion and deposits instead of lost lubrication.
Why one petrol in a diesel job around Phipps Bottom costs more than another
Four different tasks lie behind the four situations above — which is why there is no fair single quote. Which of them you are in is mostly what moves the cost. Next it is the share — how much petrol was put in against how much your tank takes — and then where the car is and whether a technician can get to it safely.
That's why our engineers ask three queries before pricing rather than after: what was put in, how much, and if it's run. Given those answers, there is a straight figure rather than a range.
About Phipps Bottom itself
Phipps Bottom is a small suburban area in Gloucestershire, situated near the coast and approximately 15 miles from Gloucester. Phipps Bottom has a relatively low elevation of 54 metres and is surrounded by nearby places such as Whitecroft and Pillowell. Phipps Bottom is characterised by its predominantly detached housing stock, reflecting its suburban nature.
Across Gloucestershire and around Phipps Bottom: fuel drain cover
Whitecroft, Pillowell and The Eaves are among the locations around Phipps Bottom that the same teams work, answering petrol in diesel jobs across Phipps Bottom's GL postcode area. A forecourt, a supermarket car park, a lay-by or your own driveway are all places we work, and the car doesn't need to move to us.
In Phipps Bottom and still at the petrol pump?
Then, you couldn't be in a better place. Turned off it remains; then ring.