Hilden Park: Petrol in a Diesel Car? How Worried to Be
If it has not been started, you can worry far less than you likely are. "Have I ruined it?" is the first thing anyone in Hilden Park asks, and the honest answer is usually no, because petrol left in a diesel tank hurts nothing until it is dragged through the fuel system — by ignition priming, by the starter, or by being driven. Leave the motor off then call Petrol in Diesel — that is how you keep it that way. What petrol really does to a diesel, how to gauge how far it's travelled, and how to keep it from happening a second time: that's the remainder of this page.
Inside the motor: what petrol in a diesel does
Passing through a motor, diesel does two jobs at the same time. Oiling comes before burning; it does both. Very fine tolerances go into the fuel injectors and the high-pressure pump, and just your diesel flowing through stops their surfaces grinding together.
Badly at the first, not at all at the second: that is petrol. Being less viscous than diesel, petrol strips out the lubrication a fuel system needs, so a pump running on that mixture wearing itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is where you hear the clattering.
Combined, those leave the shape of the trouble plain. The damage is done by movement, not by contact. A tank with petrol in it is a fuel problem. After your pump has been running on that petrol, a mechanical fault has begun: whatever is shed by a pump that's wearing down travels onward to the fuel injectors with your fuel.
Hilden Park, petrol in a diesel: four cases, from mild to serious
Fuelled, and never started: nothing beats it. The petrol is in that tank and only your tank, and the task is a drain and a flush where the vehicle sits. This is the one situation that can only truly occur at a forecourt, as anywhere else the vehicle has been driven to get there.
Ignition on, or started for a moment. The fuel system has been bled, and so petrol has left the tank and reached the filter and the lines. Drain, flush, see to the filter: still normally straightforward.
Driven a couple of miles. Now your pump has spent those miles running on thinned fuel. How hard your car was driven counts as much as how far, and this work covers that tank, the fuel lines, the fuel filter and fresh fuel through the entire circuit. The school run to Stocks Green Primary School is one thing. A run as far as London, under 50 miles away, is a very different task. So is any distance on the M26, under 10 miles from Hilden Park, where the motor has been labouring hard throughout.
Driven until it protested. Clattering, a ragged idle, smoke, a throttle that has gone soft. The engine is telling you the fuel is no longer behaving like diesel. Whether it is the verge on Hilden Park Road, a lay-by or a side road, stop there then leave it. Permanent damage is very unusual when a vehicle is stopped early, and the fuel drain and flush-through that still go first take care of it.
Hilden Park motorists and the petrol in a diesel myths they hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Nothing is removed by topping up — you are left with a fuller tank, still the same mixture. The idea behind that advice — that diesel fuel systems accept petrol by percentage — is wrong.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. At higher pressure, through finer components: that's how a modern diesel moves its fuel, so the lubrication counts more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there is no damage done." Diesel in a petrol motor generally leaves a motor that will not run: the driver stops, and so does the damage. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile the pump grinds. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a different fault. It does not put back what petrol has weakened, and that petrol is still inside the tank after that.
"Drain it yourself and you are sorted" — a myth, because after it has been running some petrol sits in your filter and lines, ready to go straight back through your pump on your next start. It's also truly dangerous to drain petrol into a can by the roadside.
How does petrol in a diesel take place?
No one does it on purpose, and it's seldom carelessness. The forecourt makes it simple: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol vehicle at all. So the slip runs one way.
When habit and your car stop matching, it happens. Courtesy car, hire car, or a car that's new. A household with one petrol and one diesel on the driveway. A forecourt you know, but with its pumps laid out differently. Fuelling up in a hurry on the way to Tonbridge, with a train to catch. Years of petrol motors behind you, a diesel Volkswagen Passat in front of you at the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of kids, and the hand repeats what it has always done.
How to prevent petrol in a diesel at your next fill-up in Hilden Park
- The label is what counts, so read the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, yet not on every forecourt.
- The first fill in an unfamiliar vehicle is the time to check your filler flap — inside it, or on the cap, plenty of cars state the fuel to use.
- Mark your key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- "Diesel", aloud, before you lift the nozzle — every time a new or hired car gets its first tank. It seems silly. It does the trick.
- Mistakes like this are easy to make whilst your mind is on something else, and so your phone goes away.
- Add-on devices exist for motors without one, and some diesels come with a filler that will not accept a petrol nozzle. Useful — but a safety net at best, never a reason to stop checking the label.
- As soon as you notice, stop: less petrol in that tank makes a thinner mix. What to do next does not change, though — still do not crank it.
Hilden Park: already put petrol in a diesel?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition switched off as well. Ask the staff to help you push it away from the petrol pump if you are still at the forecourt, whether that is BP or anywhere else. What was put in, roughly how much, and if it's run: tell us those when you phone 0333 366 0103.
If it was AdBlue rather than petrol, say so. That is a separate problem — corrosion and deposits instead of lost protection — and it has its own page for Hilden Park.
Hilden Park petrol in a diesel tasks: why one costs more than another
Four separate tasks lie behind the four situations above — which is why there's no honest single price. Chiefly, the cost shifts with which situation you're in. Two things follow that: the petrol that went in as a proportion of what that tank takes, then the place your car is in and whether a technician can reach it safely.
Three questions come first, before any quote, instead of after — what got in, how much, has it run — and that is the reason. Their answers are what turn a range into one firm number.
About Hilden Park and its setting
Hilden Park is a village situated on the banks of the River Medway in Kent, with a relatively low elevation of around 25 metres. Hilden Park lies on the outskirts of Tonbridge, near the settlements of Powder Mills and Hildenborough. Hilden Park has a mix of housing types, but semi-detached homes are particularly prevalent in the area. Hilden Park is located approximately 26.5 miles from central London, making it a commuter-friendly location.
Across Kent and around Hilden Park: fuel drain cover
Powder Mills, Hildenborough and The Park are among the locations around Hilden Park that the same teams work, answering petrol in diesel calls across Hilden Park's TN postcode area. No need to bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots we drain.
Still at the pump in Hilden Park?
No position is better: that's where you are. Phone, and keep it switched off.