How Worried Should You Be? Petrol in a Diesel Car in Holden Vale
Unstarted? Then less anxious than you probably feel. Petrol resting in a diesel tank does nothing to your engine till something pulls it through your fuel system — your ignition priming your pump, your starter, or driving on its own. So the truthful answer to the first question anyone in Holden Vale asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to phone, with the engine kept off, and so it remains that way. What petrol really does to a diesel, how to judge how far it's gone, and how to keep it from happening a second time: that is the remainder of this page.
Inside your engine: what petrol in a diesel really does
Diesel does two jobs on its way through a motor. It lubricates first, and after that does it burn. Designed to very fine gaps, your injectors and your pump rely on your diesel flowing through them to keep their surfaces from wearing against one another.
The second task petrol doesn't do at all, and the first it does poorly. A pump running on a petrol mixture is wearing itself out, because petrol is thinner than diesel and strips out the protection the fuel system depends on. Petrol is also designed to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that's where the rattling starts.
Put those together and the shape of the problem is clear. Contact does not do the damage — movement does. All a tank with petrol in it amounts to is a fuel fault. The beginning of a mechanical one is a pump that has been running on that petrol — and whatever a worn pump sheds travels on with your fuel to your injectors downstream.
Holden Vale, petrol in a diesel: four cases, from mild to major
The best case there can be: filled up, not once started. At a forecourt, and really only there, that petrol is still limited to that tank — because everywhere else the vehicle was driven to reach it. The task is draining and cleaning on the spot.
Started for a moment, or only the ignition on. Petrol has left that tank and reached the fuel filter and the lines, since the system has been primed. Normally little more than clearing, rinsing and sorting the fuel filter, and so still easy.
Those few miles driven were your pump running on fuel weakened by petrol the whole way. How hard the vehicle was driven counts as much as how far, and this work covers the tank, the fuel lines, the filter and fresh fuel through the entire circuit. Driving the kids to Haslingden St James Church of England Primary School is one sort of trip. Very different once more: a run to Preston, under 25 miles away, or some miles on the M66, under 3 miles from Holden Vale, where the engine never stopped labouring hard.
Driven on until it protested — clattering, smoke, an uneven idle, a soft throttle. That's the motor telling you its fuel has stopped acting like diesel. Leave it wherever it has stopped: a lay-by, a side street, the verge on Cribden End Lane. The fuel drain and flush-through still go first, and they sort it out: if a car is pulled over early, lasting damage is very uncommon.
Holden Vale motorists and the petrol in a diesel myths they hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. A fuller tank of the same mixture is all you get, because topping up takes out nothing. The idea behind the guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." A newer diesel sends its fuel through more precise parts at higher pressure, which makes the lubrication matter more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. A petrol engine fed diesel generally won't run, so the motorist stops and the damage stops with them. Feed petrol to a diesel and it generally starts, idles and pulls away like nothing has happened — all the while its pump wears. Fine and running are not the same thing.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an old workaround for a different problem. None of what petrol thinned is put back by it — and later, that tank still holds the petrol.
"Drain it yourself and you're sorted" — a myth, because after it's been running some petrol sits in your filter and lines, ready to go right back through the pump on the next start. It is also really hazardous to drain petrol into a can by the kerbside.
How does petrol in a diesel occur?
A careless moment is seldom the cause, and no one means to do it. A diesel nozzle mostly won't fit a petrol vehicle, but the smaller petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error straightforward, and just in that direction.
It happens when habit and the car stop matching. A vehicle that's new to you — a hire car, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Rushing for a train at Accrington and fuelling up en route. The first fill-up in a diesel Renault Megane after years of driving petrol is precisely the moment it happens. Throw in rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Next time you fill up in Holden Vale: preventing petrol in a diesel
- The label is what counts, and so read the petrol pump rather than the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt.
- In a car you do not know, look inside the flap over your filler or at the cap before your first fill: plenty of vehicles state the fuel type there.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of meaning to remember, for a household with one of each.
- 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 sounds silly and it does the trick.
- Put your phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels come with a filler built 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 reading the petrol pump.
- The moment you realise, stop: less petrol in your tank makes a thinner mixture. What to do next doesn't change, though — still do not crank it.
Holden Vale: already put petrol in a diesel?
Short and simple, then, is the order of things. Starting it is out, and so is switching on your ignition. Still on the forecourt, at Texaco or anywhere else? Ask the attendants to help you push the vehicle clear of the petrol pump. What got in, roughly how much, and if it's run: tell us those when you ring 0333 366 0103.
Corrosion and deposits are the issue with AdBlue, whereas petrol brings lost lubrication. So if it was AdBlue, say so — and see its own Holden Vale page.
One petrol in a diesel task in Holden Vale costs more than another. Why?
Four separate tasks lie behind the four scenarios above — which is why there is no fair single price. Which of them you are in is mostly what moves your cost. Where the vehicle is counts too, and whether our van can safely reach it, after the proportion of petrol to what that tank takes.
Ahead of any quote, not after, come three queries: your fuel that got in, the volume, and if it has run. That is why. A range turns into a straight figure when those answers are in.
About Holden Vale itself
Holden Vale is a suburban area in Lancashire, situated on the riverside with nearby settlements including Haslingden and Well Bank. Holden Vale has a population of around 2554 people and is characterised by predominantly terraced housing. Holden Vale sits at an elevation of 293 metres, providing views of the surrounding countryside. Holden Vale is located near to Height End and is approximately 15.8 miles from Preston, the nearest city.
Across Lancashire and around Holden Vale: fuel drain cover
Our teams answering petrol in diesel jobs in Holden Vale, in the BB postcode area, equally work the places near it, Haslingden, Well Bank and Height End among them. The vehicle does not need to come to us: our technicians drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
In Holden Vale and still at the petrol pump?
The best place there is, then — that is where you are. Keep it off. Ring.