How Worried Should You Be? Petrol in a Diesel Car in Podimore
If it has not been started, you can worry less than you probably are. Until the ignition primes the pump, the starter turns, or your vehicle is driven, petrol in a diesel tank simply waits there and does nothing. Which makes the honest reply to that first Podimore question — "have I ruined it?" — usually no. Keep it like that: leave the motor off then call Petrol in Diesel. Keep reading for three things: the effect petrol has inside a diesel engine, the clues of how far it has got, and ways to make sure you don't repeat it.
Petrol in a diesel: what does it do to the motor?
Passing through a motor, diesel is doing two things at the same time. It lubricates first, and after that does it burn. Very fine clearances go into your injectors and your high-pressure pump, and only your diesel flowing through stops those surfaces grinding together.
The second task petrol doesn't do at all, and the first it does badly. It's runnier than diesel and removes the protection the system rests on, so a pump running on a petrol mix 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.
Together, those leave the shape of the trouble plain. The harm is done by movement, not by contact. Where that petrol is only inside the tank, it's a fault of fuel, nothing more. The start of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with the fuel to the injectors downstream.
Petrol in a diesel in Podimore: how serious is it? Four cases
The best case there can be: filled up, not once started. On a forecourt, and truly only there, that petrol is still confined to your tank — since anywhere else the vehicle was driven to reach it. The job is emptying and cleaning on the spot.
A brief spell of running, or just your ignition on. Petrol has left your tank and reached the fuel filter and the lines, because your system has been primed. Drain, flush, see to the filter: still normally simple.
The pump now worked a couple of miles on weakened fuel — that's what driving the car does. Tank, lines, filter, then fresh fuel put through the entire circuit: that is this work, and the way the car was driven counts as much as the mileage. On the school run to Ilchester Community School, the miles is small. Very different a second time: a trip to Wells, under 15 miles away, or some mileage on the M5, under 25 miles from Podimore, where your engine kept working hard.
Driven till it complained. Clattering, a lumpy idle, smoke, a throttle that has gone soft. What you are hearing is the engine reporting fuel that no longer acts like diesel. Pull up wherever you are — the verge on Willow Tree Close, a lay-by, a side street — and leave the vehicle where it is. Lasting damage is very uncommon if a car is pulled over soon, and the fuel drain and flush that still go first take care of it.
Petrol in a diesel myths Podimore motorists hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing is removed when you top up — your tank just carries more of the same mixture. The assumption behind that advice — that diesel fuel systems accept petrol by percentage — is wrong.
"Newer diesels can handle a little petrol" — a myth, and closer to the opposite. At higher pressure, through finer components: that's how a current diesel handles its fuel, and so the protection counts more, not less.
This is the one that catches motorists. Myth: "If it starts and drives, there's no damage done." Feed diesel to a petrol motor and it usually will not run, and so the motorist stops — and the damage stops with them. A diesel fed petrol generally starts, ticks over and drives away as if nothing has happened, while your pump grinds. A running engine does not mean fine.
Not so: a two-stroke additive lets you to drive home. It was an old fix, supposed for another fault. What petrol has diluted stays thinned, and that petrol remains inside the tank regardless.
Myth: "Drain your tank yourself and you are sorted." Once your engine has been run, some of that petrol is no longer inside your tank: it is in the filter and your lines, and it goes straight back through your pump at your next start. Besides, petrol drained into a can by the road is truly hazardous.
How petrol ends up: petrol in a diesel
It is seldom carelessness, and no one does it on purpose. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly won't fit a petrol vehicle. That is how the forecourt makes it easy.
It takes place when habit and the car stop matching. Hire cars, courtesy cars, and vehicles that are new to you. One petrol and one diesel on the drive of the same household. A well-known forecourt with the pumps in a different order. Filling up in a rush en route to Yeovil Pen Mill, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Passat in front of you on the forecourt for its first tank — that is when. With rain, a call arriving, or a car full of children to deal with, your hand simply does what it has always done.
Avoiding petrol in a diesel next time you fill up in Podimore
- A green handle for unleaded and black for diesel is usual in the UK — yet not on each forecourt. Go by the label on the pump, not the colour.
- 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 they take.
- One of each in the home? Label the key to your diesel — a coloured fob, a sticker — because meaning to remember isn't enough.
- "Diesel", out loud, before you pick up the nozzle — every time a new or hired car needs its first tank. It seems silly. It does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away and keep your mind on the petrol pump.
- Some diesels have a filler designed to block a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the pump.
- Less petrol makes a thinner mix, and so stop the moment you notice — while remembering that your next stage is unchanged. It's still not to crank it.
Podimore: already put petrol in a diesel?
Then, there is only a short order of things. Leave it unstarted, with your ignition off as well. The attendants on the forecourt — whether at Esso itself or wherever you filled up — will usually help roll it clear of the pump if you ask. Then ring 0333 366 0103 and tell us what went in, about how much, and whether it's run.
If it was AdBlue and not petrol, say so. That's a separate problem — corrosion and deposits and not lost lubrication — and it has its own page for Podimore.
Podimore petrol in a diesel tasks: why one costs more than another
Four different tasks lie behind the four scenarios above — which is why there is no fair single price. What shifts the cost is mostly which of them you're in. After that it's the proportion — how much petrol got in against how much that tank holds — and then where the car is and whether our van can reach it safely.
That's why our technicians ask three queries before quoting instead of after: what got in, how much, and whether it's run. The replies turn a range into a straight figure.
About Podimore, for a moment
Podimore is a small village in inland Somerset, situated near the villages of Stockwitch Cross and Bridgehampton. Podimore has a low elevation of around 16 metres and is located approximately 12.8 miles from the city of Wells. Podimore remains a predominantly residential community with a high proportion of detached housing.
Fuel drain cover across Somerset, Podimore included
Stockwitch Cross, Bridgehampton and Speckington are among the places near Podimore that the same teams work, answering petrol in diesel jobs across Podimore's BA postcode area. The vehicle doesn't need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the petrol pump around Podimore, right now?
Nothing beats it: that is where you are. Leave it switched off, and ring.