How Worried Should You Be? Petrol in a Diesel Car in Leysdown-on-Sea
Less than you likely are, if it hasn't been started. Petrol sitting in a diesel tank does nothing to your motor till something draws it through the fuel system — the ignition priming the pump, your starter, or driving on its own. So the fair answer to the first question anyone around Leysdown-on-Sea asks, "have I ruined it?", is usually no. Keep it like that: leave the engine off and ring Petrol in Diesel. The rest of this page sets out what petrol really does to a diesel, how to judge how far it has got, and how to make sure it doesn't happen to you a second time.
The engine and petrol in a diesel: what happens
On its way through an engine, diesel does two tasks. Oiling comes before burning; it does both. The high-pressure fuel pump and the fuel injectors are designed to extremely fine gaps, and the diesel passing through them is what keeps those surfaces from grinding against one another.
Petrol does the first job poorly and the second not at all. It's runnier than diesel and strips away the lubrication the fuel system rests on, so a pump running on a petrol mixture is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the clattering comes from.
Taken together, they show what shape the issue takes. Not contact but movement is what causes the harm. All a tank with petrol in it amounts to is a fuel fault. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the injectors further on.
How bad is petrol in a diesel? Four scenarios our engineers see in Leysdown-on-Sea
Fuelled, and not started: no case is better. Only your tank has petrol in it, so the job is draining the tank and cleaning the system where the vehicle stands. This scenario can only really take place at a forecourt: anywhere else, the car got there by being driven.
Started for a moment, or only your ignition on. Once primed, the fuel system has pulled petrol from your tank up to your filter and the fuel lines. Drain, flush, see to your filter: still usually straightforward.
A few miles driven, and your pump has spent each of them labouring on thinned fuel. How hard the vehicle was driven counts as much as how far, and this work takes in your tank, the lines, the filter and clean fuel through the entire system. Short trips, such as the school run to St. Clement's CofE Primary School, are one thing. Any miles on the M2, under 10 miles from Leysdown-on-Sea, means the engine working hard throughout, and a run to Canterbury, under 15 miles away, makes a very different job as well.
Clattering, an uneven idle, smoke, a throttle gone soft: driven till it complained. The fuel isn't behaving like diesel any more, and the motor is saying so. Pull up on the spot — on the verge on Nutts Avenue, at the kerb, down a side road — and do not move it again. What goes first is still the drain and flush-through, and that deals with it, with lasting damage very rare when a car is stopped soon.
Myths Leysdown-on-Sea people hear about petrol in a diesel
Myth: 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. Percentage isn't how a diesel fuel system tolerates petrol, however much that advice supposes.
Not so: a modern diesel copes with a bit of petrol. Rather, the opposite. More precise parts and higher pressure are the way a newer diesel runs its fuel, and that makes the lubrication matter more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. Feed diesel to a petrol engine and it normally won't run, and so the motorist stops — and the harm stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually does; meanwhile the pump wears. Running is not the same as fine.
Not so: a two-stroke additive lets you to drive home. It was an old fix, supposed for another issue. That petrol is still in the tank afterwards, and what it has weakened is not put back.
"Drain it yourself and you're sorted" — a myth, because after it has been running some petrol lies in your filter and lines, waiting to go right back through the pump at your next start. And, a can of petrol filled by the kerbside is genuinely dangerous.
Why petrol in a diesel takes place at all
No one does it on purpose, and it is rarely 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, while a diesel nozzle mostly won't go into a petrol car at all. So the mistake runs one way.
When routine and the vehicle stop matching, it takes place. Courtesy car, hire car, or a car that is brand new. Households running one of each, petrol and diesel. Your ordinary forecourt, its pumps suddenly in a different order. Filling up in a hurry en route to Whitstable, with a train to catch. The first fill-up in a diesel Renault Clio after years of driving petrol is exactly the moment it occurs. Throw in rain, a phone call or a back seat full of kids, and the hand repeats what it has always done.
Preventing petrol in a diesel next time you fill up around Leysdown-on-Sea
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most usually do. Read the petrol pump's label; the colour is only a clue.
- Inspect the filler flap. Plenty of motors state the fuel inside the flap or on the cap. Look at it on your first fill in a car you do not know.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key if a house has one of each. So label it.
- Before the nozzle comes off the pump the first time you fill a hired or new car, say "diesel" out loud. Silly, yes, yet it works.
- Thinking about something else is when this becomes an easy mistake to make, and so put the phone away and keep your mind on the petrol pump.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to block a petrol nozzle, and add-on devices are available for the remainder. Treat it as a safety net, then keep reading the petrol pump.
- Stop as soon as you notice. Less petrol inside the tank makes a weaker blend. It doesn't change what to do next, which is still not to crank it.
Already put petrol in a diesel around Leysdown-on-Sea?
Then, there is just a short order of things. Do not switch your ignition on, and do not crank it. Ask the staff to help you push it clear of the petrol pump if you're still at the forecourt, whether that's the nearest petrol station or anywhere else. Next, 0333 366 0103. We will ask what got in, about how much, and if it's been run.
If it was AdBlue instead of petrol, say so. That's a separate fault — corrosion and deposits instead of lost protection — and it has its own page for Leysdown-on-Sea.
One petrol in a diesel task around Leysdown-on-Sea costs more than another. Why?
Four separate tasks lie behind the four situations above — which is why there is no honest single quote. Mostly, your cost moves with which situation you're in. Two things come after that: the petrol that was put in as a share of what the tank takes, then the spot the vehicle is in and whether a van can get to it safely.
Three queries come first, before any quote, instead of after — what got in, how much, has it run — and this is the reason. Their replies are what change a range into one firm number.
About Leysdown-on-Sea and its setting
Leysdown-on-Sea is a small coastal village in Kent, situated on the Isle of Sheppey at an elevation of around 12 metres. Leysdown-on-Sea lies near the towns of Warden and Bay View, and is close to the hamlet of Mud Row. Leysdown-on-Sea has a population of approximately 929 people, predominantly living in detached housing.
Across Kent and around Leysdown-on-Sea: fuel drain cover
Our vans answering petrol in diesel calls in Leysdown-on-Sea, in the ME postcode area, equally work the locations near it, Warden, Bay View and Mud Row among them. Our technicians drain wherever your vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Leysdown-on-Sea: still at the pump?
In that case, you could not be in a better position. Leave the vehicle switched off, and ring.