Broadbent: Petrol in a Diesel Car? How Worried to Be
If it hasn't been started, worry far less than you probably are. Petrol sitting in a diesel tank does nothing to the engine till something pulls it through your fuel system — your ignition priming the pump, your starter, or driving itself. So the fair answer to the first question everyone in Broadbent asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to ring, with the motor left off, so it stays that way. The rest of this page explains what petrol really does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you again.
The motor and petrol in a diesel: what goes on
Diesel has two jobs on its way through an engine. Oiling comes before burning; it does both. Designed to extremely fine gaps, the fuel injectors and your pump depend on your diesel moving through them to stop their surfaces wearing against one another.
The second task petrol doesn't do at all, and the first it does poorly. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, leaving a pump on the mixture to wear itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the knocking.
Together, those leave the shape of the issue plain. It's movement that causes the damage, not contact. Where the petrol is only inside your tank, it is a fault of fuel, nothing more. Once your pump has been labouring on that petrol, a mechanical issue has started: whatever is shed by a pump that is wearing travels downstream to the fuel injectors with the fuel.
Four situations our technicians see in Broadbent: how serious is petrol in a diesel?
The best case there can be: filled up, never started. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With that petrol kept inside your tank alone, it's emptied and flushed on the spot, and nothing more is needed.
Started for a moment, or just your ignition on. With the fuel system primed, the lines and filter now hold petrol that has come from your tank. Still usually easy: drain, flush, and the filter seen to.
The pump has spent a few miles on thinned fuel — that is what driving it meant. Tank, lines, filter, then fresh fuel run through the whole system: that is this work, and the way your car was driven counts as much as the mileage. Short trips, such as the school run to St. Theresa's RC Primary School, are one matter. Any miles on the A627(M), under 3 miles from Broadbent, means the engine has worked hard throughout, and a run to Manchester, under 10 miles away, is a very different task as well.
Knocking, a ragged idle, smoke, a throttle gone soft: driven until it complained. That's your motor telling you its fuel has stopped behaving like diesel. Stop wherever you are — the verge on Broadbent Road, a lay-by, a side street — then leave the car where it is. What comes first is still the fuel drain and flush, and that takes care of it, with lasting damage very rare when a car is stopped early.
Petrol in a diesel stories Broadbent people hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing is removed by topping up — you are left with a fuller tank, still the same mix. Percentage isn't how a diesel fuel system copes with petrol, however much that guidance presumes.
"Newer diesels can handle a little petrol" — a myth, and closer to the opposite. A current diesel sends its fuel through smaller parts at higher pressure, which makes the protection count more, not less.
The myth that catches motorists out: if it starts and drives, it must be unharmed. The motorist of a petrol engine fed diesel usually stops, because it will not run, and the damage stops there. While the pump grinds, a diesel fed petrol usually starts, idles and drives away as though nothing has happened. Being able to run isn't proof of being fine.
Myth: a two-stroke additive lets you to drive home. It is an old workaround, meant for another problem. It does not put back what petrol has diluted, and that petrol is still inside your tank afterwards.
Myth: "Drain the tank yourself and you're sorted." Once the engine has run, some of that petrol is no longer inside that tank: it's in the fuel filter and your lines, and it goes right back through your pump on the next start. Clearing petrol into a can by the roadside is also truly dangerous.
How does petrol in a diesel occur?
No one does it on purpose, and it is seldom carelessness. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle mostly will not go into a petrol vehicle at all. So the slip runs one way.
The moment habit stops matching the vehicle is the moment it takes place. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the drive. A well-known forecourt with the pumps in a different order. Fuelling up in a rush en route to Mills Hill, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Passat in front of you at the forecourt for its first tank — that's when. Add rain, a phone call or a back seat full of kids, and the hand does what it has always done.
Next time you fill up in Broadbent: preventing petrol in a diesel
- Check the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on each forecourt. The label is what counts.
- In a car you don't know, look inside the flap over the filler or at the cap before your first fill: many cars print the fuel type there.
- Good intentions do less than a sticker or a fob in a vivid colour on the diesel's key if a house has one of each. So label it.
- Before the nozzle comes off the pump the first time you fuel a hired or new car, say "diesel" aloud. Silly, perhaps, but it does the trick.
- Whilst you are thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the petrol pump.
- The moment you notice, stop: less petrol inside the tank makes a thinner mix. What to do next does not change, though — still don't start it.
Put petrol in a diesel around Broadbent already?
In that case, there's just a short order of things. Starting it is out, and so is switching on the ignition. If you are still on the forecourt — Texaco or anywhere else — ask the attendants to help you push the car away from the petrol pump. What went in, about how much, and whether it has run: tell us that when you ring 0333 366 0103.
Corrosion and deposits are the issue with AdBlue, where petrol means lost protection. So if it was AdBlue, say so — and read its own Broadbent page.
Why one petrol in a diesel task in Broadbent costs more than another
Four separate tasks lie behind the four scenarios above — which is why there is no fair single price. Which of them you are in is chiefly what moves the cost. Next it is the proportion — how much petrol was put in against how much your tank holds — and after that where the car is and whether a van can reach it safely.
That is why our engineers ask three queries before costing rather than after: what got in, how much, and if it has run. Those replies turn a range into a straight figure.
About Broadbent and its setting
Broadbent is a suburban area in Greater Manchester, situated near the River Roch and close to the towns of Royton and Rochdale. Broadbent sits at an elevation of 226 metres, with a mix of terraced housing and local amenities. Broadbent is located near several other suburban areas, including Acre and Watersheddings, and is around 8 miles from Manchester city centre. Broadbent has a population of approximately 4563 residents.
Fuel drain cover across Greater Manchester, Broadbent included
The vans answering petrol in diesel call-outs in Broadbent, in the OL postcode area, equally work the places near it, Acre, Watersheddings and Royton Moss included. A forecourt, a supermarket car park, a lay-by or your own driveway are all places our technicians drain, and your car doesn't need to move to us.
Broadbent: still at the pump?
Then you are in the best place there can be. Leave the vehicle turned off, then ring.