How Worried Should You Be? Petrol in a Diesel Car in Tottenham
Unstarted? Then less worried than you probably are. Petrol sitting in a diesel tank does nothing to your motor till something pulls it through your fuel system — your ignition priming the pump, the starter, or driving itself. So the truthful answer to the first question anyone around Tottenham asks, "have I wrecked it?", is usually no. To keep it like that, ring Petrol in Diesel then leave the motor alone. Read on for three things: the effect petrol has inside a diesel motor, the clues of how far it has got, and the way to make sure you never repeat it.
Petrol in a diesel: what does it do to your engine?
Diesel has two tasks on its way through a motor. Lubricating comes before burning; it does both. Designed to extremely fine gaps, your injectors and the pump depend on your diesel moving through them to keep their surfaces from wearing against one another.
Poorly at the first, not at all at the second: that is petrol. A pump running on a petrol blend is wearing itself out, since petrol is thinner than diesel and strips out the lubrication your fuel system depends on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that's where the knocking starts.
Taken together, they make clear what shape the problem has. Contact doesn't do the damage — movement does. All a tank with petrol in it amounts to is a fuel issue. After the pump has been running on that petrol, a mechanical problem has begun: anything shed by a pump that is grinding travels downstream to the fuel injectors with the fuel.
Four situations we see around Tottenham: how bad is petrol in a diesel?
The best case there can be: filled up, never started. Being at a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With the petrol held inside that tank alone, it's drained and cleaned on the spot, and nothing more is needed.
Ignition on, or started for a second. Petrol has left the tank and reached the fuel filter and the fuel lines, because your system has been primed. Still usually simple: drain, flush, and the fuel filter sorted.
Those few miles on the road were the pump labouring on fuel thinned by petrol the whole way. How hard your car was driven counts as much as how far, and the work takes in that tank, your lines, the filter and clean fuel through the entire system. Short trips, such as the school run to Holy Trinity CofE Primary School, are one thing. Very different once more: a trip to London, under 10 miles away, or any mileage on the M11, under 5 miles from Tottenham, where the engine kept working hard.
Rattling, a ragged idle, smoke, a throttle gone soft: driven till it complained. What you are hearing is the engine reporting fuel that no longer acts like diesel. Whether it's the verge on Arnold Road, a lay-by or a side street, stop there and leave it. The fuel drain and flush still come first, and they sort it out: if a vehicle is pulled over early, lasting damage is very unusual.
Stories Tottenham people hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Topping up takes out nothing; it gives you a fuller tank of the same mixture. Percentage is not how a diesel fuel system tolerates petrol, however much that guidance supposes.
"Newer diesels can handle a little petrol" — a myth, and nearer the opposite. Protection matters more on modern diesels, not less, since their fuel passes through finer components at higher pressure.
This is the one that catches people. Myth: "If it starts and drives, there's no damage done." The driver of a petrol engine fed diesel usually stops, since it will not run, and the harm stops there. Whilst the pump wears, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. Running is not the same as fine.
Myth: "Add some two-stroke oil and drive the car home." It is an outdated workaround for a separate problem. It does not put back what petrol has weakened, and the petrol is still in your tank after that.
Myth: "Drain the tank yourself and you're sorted." Once your engine has run, some of that petrol is no longer in the tank: it's in your filter and your lines, and it goes right back through the pump at the next start. It is also truly hazardous to drain petrol into a can at the kerbside.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Rarely, if ever. One way only, since of the nozzles: the narrower 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 easy.
Routine and the vehicle getting out of step is when it takes place. A car that is new to you — hired, on loan as a courtesy car, or just bought. One petrol and one diesel on the driveway of the same household. The pumps in a different order on a well-known forecourt. A hurried fill en route to Bruce Grove with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it occurs. Your hand repeats what it has always done when you add rain, a phone call or a back seat full of children.
Tottenham drivers: how to avoid petrol in a diesel next time
- 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 a new motor is the time to check the filler flap — inside it, or on the cap, plenty of motors state which fuel to use.
- Mark the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. It seems daft and it works.
- Mistakes like this are easy to make while your mind is on something else, and so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler built to refuse a petrol nozzle, and add-on devices are available for vehicles without one. They are a backstop, not a reason to stop checking the petrol pump.
- Noticing it mid-fill? Stop at once. A weaker blend follows from less petrol inside your tank, yet your next step remains the same: don't fire it up.
Already put petrol in a diesel around Tottenham?
Then the order of things is short. Starting it is out, and so is turning on the ignition. The attendants at the forecourt — whether at Shell itself or wherever you filled up — will usually help roll it clear of the petrol pump if you ask. Next, 0333 366 0103. We will ask what went in, roughly how much, and if it's been run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a different issue — Tottenham has a page just for it.
Why one petrol in a diesel job around Tottenham costs more than another
The four situations above are four different jobs, so no single price for this would be fair. Which of them you're in is mostly what shifts your cost. Where your car is matters too, and whether a van can safely reach it, after the proportion of petrol to what your tank holds.
Ahead of any quote, not after, we ask three questions: your fuel that was put in, its volume, and whether it's run. That's why. Given those answers, you get a straight figure instead of a range.
About Tottenham
Tottenham is a locality in north London, situated on the River Lea and close to the border with Hertfordshire. Tottenham sits at a low elevation of around 17 metres, with the surrounding area being generally flat. Tottenham is characterized by a high proportion of flat dwellings, and is located near other local areas such as Tottenham Green and Tottenham Hale. Tottenham is also close to the larger urban area of London, being around 6 miles from the city centre.
Fuel drain cover around Tottenham and across Greater London
Tottenham rests in the N postcode area, and the teams that answer petrol in diesel calls there work the spots near it as well — Tottenham Green, Tottenham Hale and Seven Sisters among them. A forecourt, a supermarket car park, a lay-by or your own drive are all spots we drain, and your car does not need to come to us.
Still at the pump around Tottenham?
In that case, you couldn't be in a better position. Keep it off. Phone.