Rushton: Petrol in a Diesel Car? How Worried to Be
Unstarted? Then less anxious than you probably feel. Everyone around Rushton begins with "have I wrecked it?", and the honest answer is usually no: petrol resting inside the tank of any diesel stays harmless till priming, cranking or driving draws it into the fuel system. Keep it that way: leave your engine off and phone Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it has travelled, and how to keep it from happening a second time: that is the remainder of this page.
What petrol in a diesel does to the engine
On its way through an engine, diesel does two tasks. Before it ignites, it protects — and then it combusts. Very fine gaps are built into your injectors and the high-pressure pump, and only the diesel flowing through stops those surfaces grinding together.
Badly at the first, not at all at the second: that's petrol. Being less viscous than diesel, petrol strips out the protection a fuel system needs, so a pump running on the blend to wear itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the clattering.
The shape of the trouble is clear when you put those together. It is circulation that does the harm, not contact. Where the petrol is only in the tank, it's a problem of fuel, nothing more. Whatever a worn pump sheds goes on, carried by the fuel, into the fuel injectors downstream, which is why a pump that has worked on that petrol is where a mechanical fault begins.
Rushton, petrol in a diesel: four cases, from mild to serious
Filled up, never started. The best case there can be. Just the tank has petrol in it, so the job is emptying the tank and rinsing the fuel system where the vehicle sits. This scenario can only really happen at a forecourt: anywhere else, the car got there by being driven.
The ignition switched on, or a short start. With the fuel system primed, the fuel lines and filter now hold petrol that came from that tank. Still usually straightforward: drain, flush, and the filter seen to.
Those few miles driven were the pump working on fuel weakened by petrol throughout. Mileage is only half of that; how hard it was driven counts just as much. Either way this work includes that tank, the lines, the filter and fresh fuel through the whole system. A school run to Eaton Primary School is one thing. Very different a second time: a trip to Chester, under 15 miles away, or any distance on the M56, under 10 miles from Rushton, where your engine never stopped running hard.
Driven till it complained. Clattering, an uneven idle, smoke, a throttle that has gone soft. The fuel is not acting like diesel any more, and your motor is saying so. Pull up on the spot — on the verge on Dogmore Lane, at the kerb, down a side road — and don't move it again. A car pulled over soon very rarely has long-term damage, as the fuel drain and the flush-through, which still go first, take care of it.
Stories Rushton people hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It doesn't. A fuller tank of the same mixture is all you get, because topping up removes nothing. A diesel fuel system does not accept petrol by percentage in the way that advice assumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. A modern diesel runs its fuel through smaller components at higher pressure, which makes the lubrication matter more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there is no harm done." Feed diesel to a petrol motor and it normally won't run, so the driver stops — and the harm stops with them. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, while the pump wears. Being able to run isn't proof of being fine.
Myth: "Add some two-stroke oil and drive it home." It is an outdated fix for a different fault. What petrol has weakened remains weakened, and the petrol remains in the tank regardless.
The next start sends petrol back round your pump from your lines and your filter, where some of that sits after your engine has run. That's why draining the tank yourself doesn't leave you sorted — a myth. Emptying petrol into a can by the kerbside is also truly hazardous.
Why petrol in a diesel occurs so easily
It is seldom carelessness, and nobody does it on purpose. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol motor at all. The forecourt makes it simple, and the mistake runs one way.
When habit and the car stop matching, it occurs. Hire cars, courtesy cars, and vehicles that are new to you. One petrol and one diesel on the driveway of the same household. The pumps in a different order on a well-known forecourt. Fuelling up in a hurry en route to Delamere, with a train to catch. Years of petrol cars behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that's when. The hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Rushton motorists: how to prevent petrol in a diesel next time
- The label is what matters, 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.
- The first fill in a new car is the time to check the filler flap — inside it, or on the cap, plenty of cars state which fuel to use.
- One of each in the home? Mark the key to the diesel — a coloured fob, a sticker — because meaning to remember is not enough.
- "Diesel", aloud, before you pick up the nozzle — every time a new or hired car gets its first tank. It seems daft. It works.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away then keep your mind on the petrol pump.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to reject a petrol nozzle, and add-on devices exist for vehicles without one. They are a backstop, not a reason to stop reading the petrol pump.
- Less petrol means a thinner blend, so stop the moment you notice — while remembering that the next stage is unchanged. It is still not to crank it.
Rushton: already put petrol in a diesel?
Short and simple, then, is the order of things. Don't switch the ignition on, and do not start it. The staff on the forecourt — whether at Murco itself or wherever you filled up — will usually help roll it away from the petrol pump if you ask. Phone 0333 366 0103 next, with three facts — your fuel, the rough quantity, and whether it has run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost protection, make it a different problem — Rushton has a page all for it.
What makes one Rushton petrol in a diesel job cost more than the next
The four situations above are four different jobs, so no single price for this would be honest. Which of them you are in is mostly what shifts your cost. The share counts next, meaning how much of your tank is petrol, followed by the position of the vehicle and whether getting to it is safe for a van.
What went in, how much, and whether it has run — three questions our technicians ask before costing, not after, for exactly that reason. A range turns into a straight figure once those answers are in.
About Rushton
Rushton is a small hamlet in Cheshire, situated inland at an elevation of 68 metres, approximately 11 miles from Chester. Rushton lies near the villages of Eaton, Little Budworth, and Cotebrook, and is characterized by its predominantly detached housing stock. Rushton remains a quiet residential community, with a population of around 538 people. Rushton is located in the North West region of England, about 155 miles from London.
Fuel drain cover across Cheshire, Rushton included
Petrol in diesel jobs around Rushton — part of the CW postcode area — go to teams that also cover the spots about it, Eaton, Little Budworth and Cotebrook included. You need not move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations we drain.
At the petrol pump in Rushton, still?
Nothing beats it: that is where you now are. Leave the vehicle turned off, and ring.