How Worried Should You Be? Petrol in a Diesel Car in Ashton Bank
Not started? Then less worried than you probably are. Petrol sitting in a diesel tank does nothing to the motor till something pulls it through your fuel system — the ignition priming the pump, the starter, or driving on its own. So the fair answer to the first question anyone in Ashton Bank asks, "have I wrecked it?", is normally no. Keep it like that: leave the engine off then phone Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel engine, the clues of how far it has spread, and ways to make sure you don't do it again.
Inside your engine: what petrol in a diesel really does
Two tasks fall to diesel on its route round a motor. Before it ignites, it protects — and then it combusts. Your high-pressure pump and your injectors are built to extremely fine tolerances, and the diesel passing through them is what stops those surfaces from grinding against each other.
The second task petrol doesn't do at all, and the first it does badly. It's thinner than diesel and removes the lubrication the system hinges on, so a pump running on a petrol blend 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 rattling comes from.
Combined, those leave the shape of the issue plain. The harm is done by circulation, not by contact. Petrol in a tank is a fuel issue. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with your fuel to your injectors further on.
How bad is petrol in a diesel? Four situations our technicians see around Ashton Bank
Fuelled, and not started: no case is better. Just that tank has petrol in it, and so the task is draining your tank and purging the fuel system where your car sits. This situation can only really happen on a forecourt: anywhere else, your car got there by being driven.
Ignition on, or started for a moment. Petrol has come out of the tank and reached the filter and the fuel lines, because the system has been primed. Usually nothing more than emptying, flushing and seeing to the filter, so still simple.
A few miles driven, and your pump has spent every one of them working on diluted fuel. Distance is only half of it; how hard it was driven counts equally. Either way this work runs to the tank, the lines, your filter and fresh fuel through the whole circuit. Short trips, such as the school run to Lea Community Primary School, are one matter. A run as far as Preston, under 3 miles away, is a very different task. So is any distance on the M55, under 3 miles from Ashton Bank, where the motor has been running hard the whole time.
Driven until it complained. Knocking, a lumpy idle, smoke, a throttle that has gone soft. The fuel isn't behaving like diesel any more, and the engine is saying so. Whether it's the verge on Whinfield Lane, a lay-by or a side road, stop where you are and leave it. The drain and flush-through still go first, and they take care of it: if a vehicle is pulled over quickly, permanent damage is very unusual.
Myths Ashton Bank motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up removes nothing; it gives you a bigger tank of the same mixture. Percentage is not how a diesel fuel system tolerates petrol, however much that advice supposes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. A modern diesel sends its fuel through more precise parts at higher pressure, which makes the lubrication matter more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that fools people. Any petrol motor fed diesel usually won't run, so the driver stops and the damage stops with them. A diesel fed petrol normally starts, idles and drives away as if nothing has happened, whilst the pump wears. Fine and running are not the same at all.
Myth: a two-stroke additive lets you to drive home. It was an old workaround, supposed for another problem. What petrol has thinned stays diluted, and the petrol stays inside the tank anyway.
Myth: "Drain your tank yourself and you are sorted." After the motor has been run, some of the petrol is no longer inside your tank: it's in the filter and the fuel lines, and it goes straight back through the pump at your next start. On top of that, petrol emptied into a can by the road is genuinely dangerous.
How does petrol in a diesel happen?
Nobody does it on purpose, and it's rarely carelessness. A diesel nozzle generally will not go into a petrol motor, but the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake easy, and only in one direction.
When routine and the car stop matching, it takes place. A new vehicle, a hire car or a courtesy car. Households running one of each, petrol and diesel. Your usual forecourt, its pumps suddenly in a different order. Filling up in a rush en route to Preston, with a train to catch. The first fill-up in a diesel Renault Clio after years of driving petrol is exactly the moment it happens. Add rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Preventing petrol in a diesel next time you fill up in Ashton Bank
- Green for unleaded and black for diesel is usual in the UK — yet not on every forecourt. Trust the label on the pump, not the colour.
- The first fill in a new vehicle is the time to check your filler flap — inside it, or on the cap, many motors state the fuel they take.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key when a house has one of each. So label it.
- "Diesel", out loud, before you pick up the nozzle — each time a new or hired car needs its first tank. It seems daft. It works.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away and keep your mind on the petrol pump.
- Add-on devices exist for vehicles without one, and some diesels are built with a filler that will not take a petrol nozzle. Helpful — but a safety net at best, never a reason to stop checking the label.
- Stop as soon as you realise. Less petrol inside your tank means a weaker mix. It doesn't change what to do next, which is still not to fire it up.
Put petrol in a diesel around Ashton Bank already?
Short and simple, then, is the order of things. Don't turn your ignition on, and do not start it. Ask the staff to help you push it clear of the petrol pump if you are still at the forecourt, whether that is the nearest petrol station or anywhere else. Next, 0333 366 0103. We'll ask what was put in, roughly how much, and if it's been run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a different problem — Ashton Bank has a page all for it.
Ashton Bank petrol in a diesel tasks: why one costs more than another
An honest single price doesn't exist here: four scenarios, four separate tasks. Which of them you are in is mostly what shifts the cost. Next it is the proportion — how much petrol got in against how much the tank holds — and then where the car is and whether a van can get to it safely.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and that is the reason. The answers turn a range into a straight figure.
About Ashton Bank itself
Ashton Bank is a suburban area located on the riverside in Lancashire, with a mix of semi-detached housing and a population of around 4480 residents. Ashton Bank sits near the city of Preston, approximately 2.1 miles away, and is close to nearby places such as Larches and Ashton-on-Ribble. Ashton Bank is positioned at a relatively low elevation of 22 metres above sea level, in a region known for its scenic riverside settings. Ashton Bank is also situated about 190.8 miles northwest of London, making it a part of the wider North West England region.
Ashton Bank and Lancashire: where our fuel drain cover runs
Ashton Bank rests in the PR postcode area, and our teams that answer petrol in diesel call-outs there work the locations around it as well — Larches, Ashton-on-Ribble and Lea among them. The car doesn't need to move to us: our engineers drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
At the petrol pump in Ashton Bank, still?
Then, you couldn't be in a better position. Leave it switched off, and ring.