Should You Worry? Petrol in a Diesel Car in Hutcherleigh
Provided it hasn't been started, worry less than you likely are. Petrol resting in a diesel tank does nothing to your motor till something pulls it through the fuel system — your ignition priming the pump, the starter, or the drive itself. So the truthful answer to the first question everyone in Hutcherleigh asks, "have I wrecked it?", is usually no. To leave the vehicle like that, call Petrol in Diesel then leave your engine alone. What petrol really does to a diesel, how to gauge how far it has gone, and how to stop it from happening a second time: that is the remainder of this page.
Inside your engine: what petrol in a diesel does
Diesel has two jobs on its way through an engine. Lubricating comes before burning; it does both. Made to very fine clearances, the injectors and your pump rely on the diesel flowing through them to keep their surfaces from wearing against one another.
Of those two jobs, petrol manages the first poorly and the second not at all. Being less viscous than diesel, petrol strips away the protection a fuel system needs, so a pump running on the blend wearing itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the rattling.
The shape of the issue is clear when you put those together. The damage is done by circulation, not by contact. Petrol in a tank is a fuel problem. The beginning of a mechanical problem is a pump that has been running on that petrol — and whatever a worn pump sheds travels on with your fuel to the injectors beyond it.
Four scenarios our technicians see around Hutcherleigh: how bad is petrol in a diesel?
Fuelled, and never started: nothing beats it. The petrol is in that tank and just that tank, and the task is a drain and a flush where the vehicle sits. This is the one situation that can only truly happen on a forecourt, as anywhere else the vehicle has been driven to get there.
A brief spell of running, or just the ignition on. Once primed, the fuel system has pulled petrol from the tank up to your filter and your lines. Still normally straightforward: drain, flush, and the filter dealt with.
Driven a few miles. Now the pump has spent those miles labouring on diluted fuel. Distance is only half of it; how hard it was driven matters equally. Either way this work runs to your tank, your lines, the fuel filter and fresh fuel through the whole system. Driving the children to Blackawton Primary School is one sort of trip. Very different a second time: a run to Plymouth, under 25 miles away, or any distance on the M5, under 25 miles from Hutcherleigh, where the motor never stopped labouring hard.
Driven on till it protested — knocking, smoke, an uneven idle, a soft throttle. The fuel is not acting like diesel any more, and your engine is saying so. Leave it where it stops: a lay-by, a side street, the verge on Hutcherleigh Cross. What goes first is still the fuel drain and flush-through, and that takes care of it, with permanent damage very uncommon when a car is pulled over quickly.
Hutcherleigh motorists and the petrol in a diesel myths they hear
False: topping up to full with diesel makes it fine. It does not. Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. The assumption behind that advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
Not so: a modern diesel copes with a bit of petrol. Rather, the reverse. At higher pressure, through more precise parts: that's how a modern diesel moves its fuel, and so the lubrication matters for more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. A petrol motor fed diesel generally won't run, and 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 will; meanwhile your pump wears. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct problem. It does not put back what petrol has thinned, and that petrol is still in the tank later on.
Once the motor has run, part of the petrol is in your filter and the fuel lines, not your tank — and your next start sends it straight back through the pump. So the myth "drain your tank yourself and you're sorted" doesn't stand up. Also, a can of petrol drained at the roadside is truly risky.
Petrol in a diesel: how does it take place?
On purpose? Never. Through carelessness? Rarely, if ever. The forecourt makes it simple: the petrol nozzle is the smaller of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol car at all. So the mistake runs one way.
When routine and your car stop matching, it takes place. A new vehicle, a hire car or a courtesy car. Two vehicles on one drive, one petrol, one diesel. A forecourt you know, but with its pumps arranged differently. Rushing for a train at Totnes and filling up en route. Exactly the moment it takes place: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. Your hand repeats what it has always done once you add rain, a phone call or a back seat full of kids.
Next time you fill up around Hutcherleigh: avoiding petrol in a diesel
- Check the pump, not the colour. In the UK unleaded handles are generally green and diesel black, but not on each forecourt. The label is what matters.
- The first fill in an unfamiliar vehicle is the time to check the filler flap — on it, or on the cap, many vehicles state the fuel to use.
- Label your 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.
- "Diesel", aloud, before you lift the nozzle — every time a new or hired car needs its first tank. It sounds daft. It does the trick.
- Mistakes like this are simple to make while your mind is on something else, so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to reject 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 petrol pump.
- Spotting it halfway? Stop there and then. A thinner mixture follows from less petrol inside the tank, yet the next stage remains the same: don't start it.
Petrol already in a diesel in Hutcherleigh? Begin here
Short and simple, then, is the order of things. Do not switch the ignition on, and do not crank it. Ask the attendants to help you roll it clear of the petrol pump if you're still on the forecourt, whether that's BP or anywhere else. Then phone 0333 366 0103 and tell us what was put in, roughly how much, and whether it has run.
Say so if it was AdBlue rather than petrol: it is a different fault, with its own page for Hutcherleigh, since AdBlue brings corrosion and deposits instead of lost protection.
One petrol in a diesel task in Hutcherleigh costs more than another. Why?
Four separate jobs lie behind the four scenarios above — which is why there is no honest single quote. The situation itself does most of the work of moving your cost. The share matters next, meaning how much of your tank is petrol, and then the position of the vehicle and whether getting to it is safe for a van.
Three queries come first, before quoting, instead of after — what got in, how much, has it run — and this is the reason. The answers change a range into a straight figure.
About Hutcherleigh and where it is
Hutcherleigh is a small hamlet in Devon, situated inland at an elevation of 126 metres, and is located near the villages of Woodford and Millcombe. Hutcherleigh is characterized by its predominantly detached housing stock, reflecting its rural setting. Hutcherleigh sits within a network of small settlements, including nearby Blackawton, and is approximately 19 miles from Plymouth. Hutcherleigh has a population of around 511 residents.
Fuel drain cover across Devon, Hutcherleigh included
Our vans answering petrol in diesel jobs around Hutcherleigh, in the TQ postcode area, also work the locations around it, Woodford, Millcombe and Blackawton included. No need to move your car to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all spots where we work.
Hutcherleigh: still at the pump?
In that case, you couldn't be in a better position. Keep it off. Ring.