Petrol in a Diesel Car in Silver Royd Hill: How Worried Should You Be?
Probably less than you are now — as long as nobody has started it. Until the ignition primes the pump, the starter turns, or your vehicle is driven, petrol in a diesel tank just sits there and does nothing. Which means the truthful reply to the first Silver Royd Hill question — "have I ruined it?" — usually no. Leave the engine off then call Petrol in Diesel — that keeps it like that. What petrol really does to a diesel, how to judge how far it's gone, and how to keep it from happening a second time: that's the rest of this page.
What petrol in a diesel does to your engine
Diesel has two tasks on its way through a motor. It ignites, and before it burns it protects. Extremely fine gaps are built into the injectors and your high-pressure pump, and only your diesel running through keeps their surfaces from grinding together.
Badly at the first, not at all at the second: that's petrol. It is thinner than diesel and takes away the protection your fuel system rests on, and so a pump running on a petrol blend is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the clattering comes from.
Together, those leave the shape of the problem plain. Contact doesn't do the damage — circulation does. All a tank with petrol in it amounts to is a fuel fault. After your pump has been working on that petrol, a mechanical problem has started: whatever is shed by a pump that's wearing down is carried onward to the injectors with your fuel.
Petrol in a diesel in Silver Royd Hill: how bad is it? Four situations
Fuelled, and not started: nothing beats it. Being on a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With the petrol kept in your tank alone, it's cleared and purged right where it stands, and nothing more is needed.
A moment's running, or just your ignition on. Once primed, the fuel system has pulled petrol from that tank up to your filter and the fuel lines. Still generally straightforward: drain, flush, and your filter dealt with.
Driven a couple of miles. Now the pump has spent these miles working on weakened fuel. Mileage is only half of it; how hard it was driven matters just as much. Either way the work includes your tank, your lines, the fuel filter and fresh fuel through the entire circuit. A school run to Whingate Primary School is one thing. Very different again: a run to Leeds, under 3 miles away, or some miles on the M621, under 3 miles from Silver Royd Hill, where the engine kept running hard.
Driven on until it complained — clattering, smoke, an uneven idle, a dead throttle. The fuel isn't behaving like diesel any more, and the motor is saying so. Stop where you are — on the verge on Silver Royd Place, at the kerb, down a side road — and don't move it. A car stopped early very seldom has lasting damage, since the fuel drain and the flush, which still go first, take care of it.
What Silver Royd Hill people get told about petrol in a diesel — and the stories in it
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Topping up takes out nothing; it gives you a bigger tank of the same mix. The assumption behind that guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
If anything, the opposite holds. Myth: "A modern diesel can cope with a bit of petrol." A modern diesel sends its fuel through smaller parts at higher pressure, which makes the protection matter more, not less.
"It starts, it drives, so there is no harm" — the myth that catches more drivers than any other. Diesel in a petrol motor generally leaves a motor that will not run: the motorist stops, and so does the damage. Whilst your pump wears, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. Fine and running aren't the same thing.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a different problem. None of what petrol weakened gets put back by it — and later, that tank still holds that petrol.
"Drain it yourself and you're sorted" — a myth, because after it has been running some petrol lies in the fuel filter and lines, ready to go straight back through the pump on your next start. It is also genuinely hazardous to drain petrol into a can by the roadside.
How petrol ends up: petrol in a diesel
No one does it on purpose, and it's rarely carelessness. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol car at all. The forecourt makes it simple, and the mistake runs one way.
It happens when routine and your car stop matching. A motor that's new to you — a hire car, on loan as a courtesy car, or brand new. A household with one petrol and one diesel on the driveway. A well-known forecourt with the pumps in a different order. Filling up in a hurry on the way to Bramley (West Yorkshire), with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver used to petrol: precisely when it occurs. Throw in rain, a phone call or a back seat full of kids, and the hand repeats what it has always done.
Next time you fill up around Silver Royd Hill: avoiding petrol in a diesel
- Read the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on each forecourt. The label is what matters.
- Many cars state the fuel inside the filler flap or on the cap, and so check there on the first fill in any vehicle you do not know.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of meaning to remember, in a household with one of each.
- It seems silly and it works: on the first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump.
- Tuck your phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels have a filler designed to refuse a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the petrol pump.
- Less petrol means a weaker mixture, and so stop the moment you notice — while remembering that the next stage is unchanged. It is still not to crank it.
Silver Royd Hill: already put petrol in a diesel?
The order of things is short, then. Starting it is out, and so is turning on the ignition. The staff at the forecourt — whether at BP itself or wherever you filled up — will usually help roll it away from the petrol pump if you ask. Then ring 0333 366 0103 and tell us what went in, roughly how much, and whether it's run.
If it was AdBlue rather than petrol, say so. That's a separate problem — corrosion and deposits and not lost lubrication — and it has its own page for Silver Royd Hill.
One petrol in a diesel task in Silver Royd Hill costs more than another. Why?
There is no honest single price for this, because the four scenarios above are four separate tasks. What shifts the cost is mostly which of them you're in. Next it is the ratio — how much petrol went in against how much your tank holds — and after that where the vehicle is and whether a van can get to it safely.
Three questions come first, before quoting, rather than after — what got in, how much, has it run — and this is the reason. The answers turn a range into a straight figure.
About Silver Royd Hill
Silver Royd Hill is a suburban area situated near the outskirts of Leeds, with its lakeside setting and relatively low elevation of 75 metres. Silver Royd Hill lies close to several nearby places, including Farnley, Gamble Hill, and Carr Crofts, and is approximately 2.5 miles from the city centre of Leeds. Silver Royd Hill has a population of around 6709 people, predominantly residing in terraced housing.
Across West Yorkshire and around Silver Royd Hill: fuel drain cover
Silver Royd Hill rests in the LS postcode area, and our vans that answer petrol in diesel jobs there work the places around it as well — Farnley, Gamble Hill and Carr Crofts among them. No need to move your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots we drain.
At the pump around Silver Royd Hill, still?
In that case, you could not be in a better position. Keep it off. Call.