--- title: Rattray: Petrol in a Diesel Car, Explained canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/rattray-perth-and-kinross/ location: Rattray county: Perth and Kinross latitude: 56.596480 longitude: -3.321840 service: Petrol in a Diesel Car updated: 2026-10-25 --- # Should You Worry? Petrol in a Diesel Car in Rattray Provided it has not been started, worry far less than you probably are. Petrol resting in a diesel tank does nothing to your engine until something draws it through the system — the ignition priming the pump, your starter, or driving itself. So the truthful answer to the first question everyone around Rattray asks, "have I wrecked it?", is normally no. Keep it like that: leave the engine off then ring Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel motor, the signs of how far it has spread, and the way to make sure you don't do it again. ## Petrol in a diesel: what does it do to your engine? On its way through a motor, diesel has two jobs. Before it burns, it protects — and then it combusts. Your high-pressure pump and the fuel injectors are built to very fine clearances, and the diesel passing through them is what keeps those surfaces from wearing down against each other. Of those two jobs, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips out the protection a fuel system needs, so a pump running on that mixture to wear itself. It is equally made to resist igniting under compression — the opposite of what a diesel needs — which is why you hear the rattling. Combined, those leave the shape of the problem clear. Contact doesn't do the harm — movement does. Any tank with petrol in it is a fuel problem. Whatever a worn pump sheds goes on, carried by the fuel, into the fuel injectors downstream, which is why a pump that has been working on that petrol is where a mechanical fault begins. ## Petrol in a diesel in Rattray: how serious is it? Four situations The best case there can be: filled up, never started. At a forecourt, and really only there, the petrol is still confined to the tank — since anywhere else the car was driven to reach it. The task is emptying and flushing on the spot. Ignition on, or started for a moment. With your system primed, your lines and filter already contain petrol that has come from the tank. Drain, flush, see to the filter: still usually easy. Driven a couple of miles. Now the pump has spent those miles working on diluted fuel. The work is your tank, your lines, the fuel filter and fresh fuel through the entire circuit, and how hard the vehicle was driven counts as much as how far. Driving the kids to the local primary school is one kind of trip. Very different a second time: a trip to Perth, under 15 miles away, or some distance on the M90, under 15 miles from Rattray, where the engine never stopped running hard. Driven on until it protested — knocking, smoke, an uneven idle, a dead throttle. What you are hearing is the motor signalling fuel that no longer acts like diesel. Pull up where you are — on the verge on Parkhill Road, at the kerb, down a side road — and do not move it. A car pulled over early very seldom has permanent damage, since the drain and the flush-through, which still go first, deal with it. ## What Rattray motorists get told about petrol in a diesel — and the myths in it "Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. A bigger tank of the same mix is all it gives, because topping up removes nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice presumes. If anything, the opposite holds. Myth: "A current diesel can cope with a bit of petrol." Lubrication matters more on newer diesels, not less, since their fuel passes through smaller parts at higher pressure. This is the one that fools drivers. Myth: "If it starts and drives, there is no harm done." Any petrol engine fed diesel generally will not run, and so the driver stops and the harm stops with them. Feed petrol to a diesel and it generally starts, idles and drives away as if nothing has happened — all the while its pump is wearing. Running doesn't mean fine. Myth: "Add some two-stroke oil and drive it home." It is an old fix for a distinct issue. None of what petrol diluted is put back by it — and afterwards, that tank still holds the petrol. Once your engine has run, part of that petrol sits in the fuel filter and your lines, not that tank — and your next start pulls it right back through your pump. So the myth "drain the tank yourself and you're sorted" doesn't hold. Emptying petrol into a can by the roadside is also truly hazardous. ## How does petrol in a diesel occur? On purpose? Never. Through carelessness? Rarely, if ever. The petrol nozzle is the smaller of the two and slips into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol vehicle at all. The forecourt makes it simple, and the slip runs one way. When habit and the vehicle stop matching, it happens. Courtesy car, hire car, or a car that is new. Two motors on one driveway, one petrol, one diesel. The pumps in a different order on a well-known forecourt. A train to catch, and a hurried fill on the way to Dunkeld & Birnam. Precisely the moment it happens: 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 kids, and your hand repeats what it has always done. ## Rattray drivers: how to avoid petrol in a diesel next time - The label is what matters, so check the pump rather than the colour: in the UK unleaded handles are usually green and diesel black, yet not on every forecourt. - In a motor you do not know, look inside the flap over the filler or at the cap before the first fill: many vehicles state the fuel there. - Label the key. In a household 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 silly and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. - Tuck your phone away. This is an easy mistake to make while you're thinking about something else. - Some diesels come with a filler designed 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 checking the pump. - Less petrol means a thinner mixture, so stop as soon as you notice — while remembering that the next step is unchanged. It is still not to fire it up. ## Put petrol in a diesel around Rattray already? Short and simple, then, is the order of things. Do not crank it, and don't turn the ignition on. Ask the attendants to help you roll it away from the petrol pump if you are still at the forecourt, whether that is Tesco or anywhere else. Phone 0333 366 0103 next, with three facts — your fuel, the approximate amount, and whether it's run. Say so if it was AdBlue instead of petrol: it's a separate fault, with its own page for Rattray, because AdBlue brings corrosion and deposits rather than lost lubrication. ## What makes one Rattray 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. What shifts the cost is chiefly which of them you're in. Two things follow that: the petrol that got in as a share of what your tank takes, then the place the car is in and whether a technician can reach it safely. Three questions come first, before quoting, instead of after — what was put in, how much, has it run — and that is the reason. Their answers are what turn a range into one firm number. ## About Rattray Rattray is a suburban area situated on the riverside in Perth and Kinross, with a mix of detached housing and a population of around 1804 residents. Rattray lies close to the nearby towns of Blairgowrie and Westfields of Rattray, and is approximately 14.6 miles from Perth. Rattray's elevation is around 83 metres above sea level, and it is located in a scenic area near the Scottish countryside. Rattray is also relatively distant from major cities like London, being around 374.6 miles away. ## Rattray and Perth and Kinross: where our fuel drain cover runs Westfields of Rattray, Blairgowrie and Blairgowrie and Rattray are among the locations near Rattray that the same teams work, answering petrol in diesel jobs across Rattray's PH postcode area. You need not bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all places where we work. ## Still at the pump in Rattray? The best place there is, then — that's where you are. Leave it switched off, and ring.