Stapleton: Petrol in a Diesel Car? How Worried to Be
Far less than you likely are, provided it has not been started. Petrol resting in a diesel tank does nothing to the engine till something draws it through the fuel system — your ignition priming your pump, your starter, or driving itself. So the honest answer to the first question everyone around Stapleton asks, "have I wrecked it?", is generally no. To leave the vehicle like that, call Petrol in Diesel and leave your motor switched off. Below, you will find what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
The motor and petrol in a diesel: what goes on
Two tasks fall to diesel on its route round a motor. It protects first, and after that does it burn. The high-pressure fuel pump and the injectors are made to very fine tolerances, and your diesel passing through them is what keeps those surfaces from grinding against each other.
Petrol handles the first task poorly and the second not at all. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, leaving a pump on that mixture to wear itself. It's equally made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the rattling.
The shape of the trouble is clear when you put those together. The harm is done by movement, not by contact. A tank with petrol in it is a fuel fault. The beginning of a mechanical one is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with your fuel to your injectors downstream.
Stapleton, petrol in a diesel: four situations, from mild to major
The best case there is: filled up, not once started. The petrol is inside the tank and only that tank, and the task is a drain and a flush where the car stands. This is the one scenario that can only really occur at a forecourt, since anywhere else the vehicle has been driven to get there.
Your ignition turned on, or a brief start. The system has been primed, and so petrol has left the tank and got to your filter and your lines. That is normally still a simple job — a drain, a flush, and your filter seen to.
Those few miles on the road were your pump working on fuel weakened by petrol the whole way. Tank, lines, filter, then clean fuel put through the whole system: that is this work, and the way the car was driven counts as much as the miles. Driving the kids to Glenfrome Primary School is one sort of trip. Any mileage on the M32, under a mile from Stapleton, means the engine working hard throughout, and a run to Bristol, under 3 miles away, makes a very different job as well.
Driven on till it complained — knocking, smoke, a ragged idle, a dead throttle. That is the motor telling you its fuel has stopped behaving like diesel. Leave it wherever it has stopped: a lay-by, a quiet street, the verge on Fry's Close. What goes first is still the drain and flush-through, and that sorts it out, with lasting damage very unusual when a vehicle is stopped early.
Stapleton drivers and that petrol in a diesel stories they hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing comes out when you top up — the tank simply carries more of the same blend. The idea behind the guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: a newer diesel copes with a bit of petrol. If anything, the opposite. Finer components and higher pressure are how a newer diesel runs its fuel, and that makes the lubrication count more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there's no harm done." A petrol motor fed diesel generally will not 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, as it usually does; meanwhile the pump wears. Fine and running are not the same at all.
Not so: a two-stroke additive lets you to drive home. It is an old fix, supposed for another problem. None of what petrol diluted is put back by it — and afterwards, your tank still holds that petrol.
If the engine has run, part of the petrol sits in the filter and your lines, not your tank — and your next start sends it right back through your pump. So the myth "drain your tank yourself and you're sorted" does not hold. It's also truly hazardous to drain petrol into a can by the kerbside.
Why petrol in a diesel takes place at all
On purpose? Never. Through carelessness? Rarely, if ever. One way only, since of the nozzles: the smaller petrol one slips inside a diesel filler with almost no resistance, while the diesel one generally won't fit a petrol car. That is how the forecourt makes it easy.
It occurs when habit and your car stop matching. Courtesy car, hire car, or a car that is brand new. Two vehicles on one driveway, one petrol, one diesel. Your normal forecourt, its pumps now in a different order. Rushing for a train outside Ashley Down and filling up en route. A new-to-you diesel Peugeot 308, its first fuelling, and a driver accustomed to petrol: exactly when it happens. Throw in a back seat full of kids, a phone call or rain, and habit wins.
How to prevent petrol in a diesel on your next fill-up around Stapleton
- The label is what counts, so read the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- The first fill in a strange vehicle is the time to check the filler flap — inside it, or on the cap, plenty of cars state which fuel to use.
- 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" aloud before you take the nozzle off the pump. It seems daft and it works.
- Put the phone away. This is an easy mistake to make whilst you're thinking about something else.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- The moment you realise, stop: less petrol in the tank makes a thinner blend. What to do next doesn't change, though — still don't fire it up.
Put petrol in a diesel around Stapleton already?
The order of things is short, then. Leave it unstarted, with the ignition switched off as well. Still on the forecourt, at Texaco or anywhere else? Ask the attendants to help you roll the vehicle clear of the petrol pump. Call 0333 366 0103 next, with three facts — the fuel, the approximate amount, and if it has run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different issue — Stapleton has a page just for it.
One petrol in a diesel task in Stapleton costs more than another. Why?
A fair single price does not exist here: four scenarios, four separate tasks. The scenario itself does most of the work of moving your cost. Two things follow that: the petrol that got in as a share of what your tank holds, then the spot your car is in and whether a technician can get to it safely.
Three queries come first, before any quote, instead of after — what was put in, how much, has it run — and that is the reason. Those answers change a range into a straight figure.
About Stapleton itself
Stapleton is a village situated on the riverside in the county of Bristol, with a mix of terraced housing and other residential properties. Stapleton sits at an elevation of around 40 metres, close to the city of Bristol and near neighbouring areas such as Eastville and Upper Eastville. Stapleton has a population of approximately 1786 residents, living in a location that is around 2.8 miles from Bristol city centre. Stapleton is also near Clay Bottom, another local area of interest.
Stapleton and Bristol: where our fuel drain cover reaches
The vans answering petrol in diesel calls around Stapleton, in the BS postcode area, also work the spots near it, Eastville, Upper Eastville and Clay Bottom among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations we work, and the vehicle does not need to move to us.
At the pump around Stapleton, right now?
The best place there is, then — that is where you are. Ring, and leave it turned off.