--- title: Petrol in a Diesel Car Andrews Hill — Explained canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/andrews-hill-west-sussex/ location: Andrews Hill county: West Sussex latitude: 51.007780 longitude: -0.463690 service: Petrol in a Diesel Car updated: 2026-10-24 --- # Should You Worry? Petrol in a Diesel Car in Andrews Hill Likely less than you are now — provided no one has started the vehicle. Petrol sitting in a diesel tank does nothing to your engine until something pulls it through your fuel system — your ignition priming your pump, your starter, or the drive itself. So the fair answer to the first question everyone around Andrews Hill asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to ring, with your motor left off, and so it stays that way. Further down, you will find what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you again. ## Inside the engine: what petrol in a diesel does Passing through a motor, diesel is doing two jobs at the same time. Oiling comes before burning; it does both. The high-pressure pump and the injectors are made to extremely fine tolerances, and your diesel passing through them is what keeps those surfaces from wearing against one another. Of these two jobs, petrol manages the first badly and the second never. A pump working on a petrol mix is wearing itself out, since petrol is thinner than diesel and strips out the protection your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that's where any rattling starts. The shape of the issue is plain once you put those together. Not contact but circulation is what does the damage. Where that petrol is only inside your tank, it is a problem of fuel, nothing more. The beginning 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 fuel injectors downstream. ## Four situations we see around Andrews Hill: how serious is petrol in a diesel? The best case there is: filled up, not once started. The petrol is in your tank and just your tank, and the job is a drain and a flush where the vehicle stands. This is the one situation that can only really happen at a forecourt, since anywhere else the vehicle has been driven to get there. Ignition on, or started for a moment. Once primed, the system has drawn petrol out of your tank as far as your filter and your lines. Still generally simple: drain, flush, and the filter sorted. The pump has spent a few miles on weakened fuel — that is what driving the vehicle does. Distance is only half of it; how hard it was driven counts equally. Either way the work runs to your tank, the lines, your filter and fresh fuel through the entire circuit. On the school run to Billingshurst Primary Academy, the mileage is small. A run as far as Chichester, under 25 miles away, is a very different job. So is any mileage on the M23, under 15 miles from Andrews Hill, where your engine has been running hard throughout. Driven on till it protested — rattling, smoke, an uneven idle, a soft throttle. What you are hearing is the engine signalling fuel that no longer behaves like diesel. Whether it's the verge on Bridgewater Close, a lay-by or a side road, stop where you are and leave it. The fuel drain and flush-through still go first, and they deal with it: if a vehicle is pulled over early, long-term damage is very unusual. ## What Andrews Hill people get told about petrol in a diesel — and the myths in it False: topping up to full with diesel makes it fine. It does not. Topping up removes nothing; it gives you a fuller tank of the same mixture. A diesel fuel system doesn't accept petrol by percentage in the way that advice supposes. Myth: a newer diesel copes with a bit of petrol. Rather, the reverse. Lubrication counts more on newer diesels, not less, since their fuel runs through finer parts at higher pressure. One myth that catches motorists out: if it starts and drives, it must be unharmed. Diesel in a petrol motor generally means a motor that won't run: the motorist stops, and so does the harm. A diesel fed petrol normally starts, ticks over and drives away as if nothing has happened, while your pump wears. Fine and running aren't the same at all. Myth: "Add some two-stroke oil and drive the car home." It's an old workaround for a different issue. None of what petrol thinned gets put back by it — and later, the tank still contains that petrol. Myth: "Drain your tank yourself and you're sorted." After the motor has been run, some of the petrol is no longer in the tank: it's in the filter and the lines, and it goes straight back through your pump at the next start. And, a can of petrol filled at the roadside is genuinely hazardous. ## How petrol ends up: petrol in a diesel On purpose? Never. Through carelessness? Rarely, if ever. One way only, because of the nozzles: the smaller petrol one slides inside a diesel filler with almost no resistance, while the diesel one generally will not fit a petrol car. That's how the forecourt makes it straightforward. It happens when habit and the vehicle stop matching. Hire cars, courtesy cars, and vehicles that are new to you. Two vehicles on one driveway, one petrol, one diesel. A familiar forecourt with the pumps in a different order. A rushed fill on the way to Billingshurst with a train to catch. Exactly the moment it takes place: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. Throw in rain, a phone call or a back seat full of children, and your hand repeats what it has always done. ## Preventing petrol in a diesel next time you fill up in Andrews Hill - The label is what matters, so check the petrol pump rather than the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt. - Plenty of motors state the fuel inside your filler flap or on the cap, and so check it on the first fill in a vehicle you don't know. - Mark the key. In a house with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember. - It seems daft and it works: on your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. - Whilst you are thinking about something else, this is an easy mistake to make — so put the phone away. - Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to refuse a petrol nozzle, and add-on devices are available for the rest. Treat it as a backstop, then keep reading the pump. - Noticing it halfway? Stop there and then. A thinner mix follows from less petrol in your tank, yet the next step remains the same: don't crank it. ## Already put petrol in a diesel around Andrews Hill? Then, there is just a short order of things. Never crank it, and do not switch the ignition on. The attendants at the forecourt — whether at EG On the Move itself or wherever you filled up — will normally help push it clear of the petrol pump if you ask. Then call 0333 366 0103 and tell us what was put in, roughly how much, and if it has run. If it was AdBlue and not petrol, say so. That is a separate issue — corrosion and deposits instead of lost protection — and it has its own page for Andrews Hill. ## One petrol in a diesel task around Andrews Hill costs more than another. Why? A fair single quote doesn't exist here: four situations, four separate jobs. Chiefly, the cost moves with which one you're in. Beyond that it is the proportion — how much petrol got in against how much the tank takes — and after that where the car is and whether our van can get to it safely. That is why our technicians ask three queries before costing instead of after: what was put in, how much, and if it has run. Those replies turn a range into a straight figure. ## About Andrews Hill and its setting Andrews Hill is a suburban area in West Sussex, situated near the River Adur and close to the villages of Parbrook and Adversane. Andrews Hill has a relatively low elevation of around 25 metres and is located near the town of Billingshurst. Andrews Hill is characterized by its predominantly detached housing stock and is approximately 18 miles from the city of Chichester. Andrews Hill is also within commuting distance of London, being around 37.5 miles from the capital. ## Fuel drain cover across West Sussex, Andrews Hill included Our teams answering petrol in diesel jobs in Andrews Hill, in the RH postcode area, also work the spots around it, Parbrook, Adversane and Billingshurst among them. The car doesn't need to move to us: our engineers drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive. ## Still at the petrol pump around Andrews Hill? Then you're in the best place there is. Ring, and leave it turned off.