Should You Worry? Petrol in a Diesel Car in Undercliffe
If it hasn't been started, worry far less than you probably are. Petrol resting in a diesel tank does nothing to the motor till something pulls it through the fuel system — your ignition priming your pump, your starter, or driving on its own. So the truthful answer to the first question anyone in Undercliffe asks, "have I wrecked it?", is generally no. To keep it like that, call Petrol in Diesel then leave the motor switched off. Below, you will find what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
Inside your engine: what petrol in a diesel really does
Two jobs fall to diesel on its route through a motor. Lubricating comes before burning; it does both. Built to extremely fine tolerances, your injectors and your pump rely on your diesel moving through them to keep their surfaces from wearing against one another.
Of these two tasks, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, leaving a pump running on the blend wearing itself. It's equally made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the clattering.
Together, those leave the shape of the trouble plain. It is movement that does the damage, not contact. Petrol in the tank is a fuel fault. Once the pump has been running on that petrol, a mechanical fault has started: whatever is shed by a pump that is wearing down is carried downstream to your injectors with the fuel.
Four scenarios our technicians see in Undercliffe: how serious is petrol in a diesel?
Filled up, never started. The best case there can be. Just the tank has petrol in it, and so the job is emptying your tank and rinsing the system where the car sits. This scenario can only truly take place on a forecourt: anywhere else, the car got there by being driven.
Ignition on, or started for a moment. Your system has been bled, so petrol has left the tank and got to your filter and the fuel lines. That's generally still a straightforward task — a drain, a flush, and the filter seen to.
Those few miles driven were the pump labouring on fuel diluted by petrol the whole way. Miles is only half of that; how hard it was driven matters just as much. Either way this work runs to your tank, your lines, your filter and fresh fuel through the whole system. Short trips, such as the school run to Peel Park Primary School and Nursery, are one thing. Getting as far as Bradford, under 3 miles away, makes a very different job — as does any distance on the M606, under 3 miles from Undercliffe, with the engine working hard the whole time.
Clattering, a ragged idle, smoke, a throttle gone soft: driven until it complained. That's the engine telling you its fuel has stopped behaving like diesel. Pull up where you are — on the verge on Northcote Road, at the kerb, down a side road — and do not move it again. Long-term damage is very unusual when a car is pulled over soon, and the drain and flush that still come first take care of it.
Petrol in a diesel myths Undercliffe motorists hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing is removed when you top up — the tank just carries more of the same mixture. Percentage is not how a diesel fuel system copes with petrol, however much that advice assumes.
Not so: a current diesel copes with a bit of petrol. Rather, the reverse. A modern diesel sends its fuel through smaller components at higher pressure, which makes the protection count more, not less.
"It starts, it drives, so no harm done" — the myth that catches more people than any other. Feed diesel to a petrol engine and it generally won't run, so the driver stops — and the damage stops with them. While your pump wears, a diesel fed petrol usually starts, ticks over and drives away as though nothing has happened. Being able to run isn't the same as being fine.
An outdated workaround for a different fault lies behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." It doesn't put back what petrol has diluted, and the petrol is still in that tank after that.
The next start sends petrol back round the pump from your lines and the fuel filter, where some of that sits after your engine has run. That's why draining the tank yourself doesn't sort it — a myth. On top of that, petrol drained into a can by the road is truly risky.
Why petrol in a diesel takes place at all
No one does it on purpose, and it's rarely carelessness. A diesel nozzle generally won't go into a petrol motor, yet the narrower petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake simple, and only in one direction.
The moment habit stops matching your car is the moment it happens. Any vehicle that's new to you — hired, on loan as a courtesy car, or just bought. A household with one petrol and one diesel on the driveway. A familiar forecourt with the pumps in a different order. Rushing for a train at Bradford Forster Square and fuelling up en route. Years of petrol motors behind you, a diesel Renault Megane in front of you at the forecourt for its first tank — that's when. Add a back seat full of kids, a phone call or rain, and habit takes over.
Next time you fill up in Undercliffe: preventing petrol in a diesel
- The label is what counts, so read the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- Inspect your filler flap. Plenty of motors state the fuel type inside the flap or on the cap. Look at it on your first fill in a motor you do not know.
- Label the key. In a house with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump. It sounds daft and it works.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away and keep your mind on the pump.
- Add-on devices are available for vehicles without one, and some diesels are built with a filler that will not accept a petrol nozzle. Useful — but a backstop only, never a reason to stop checking the label.
- Noticing it mid-fill? Stop there and then. A weaker mixture results from less petrol inside that tank, yet the next stage remains the same: do not crank it.
Petrol already in a diesel in Undercliffe? Start here
Then the order of things is short. Starting it is out, and so is turning on the ignition. The attendants on the forecourt — whether at Texaco itself or wherever you filled up — will normally help push it away from the petrol pump if you ask. Then phone 0333 366 0103 and tell us what went in, about how much, and whether it's run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a separate fault — Undercliffe has a page just for it.
What makes one Undercliffe petrol in a diesel job cost more than the next
There is no fair single quote for this, since the four situations above are four separate jobs. Chiefly, the cost moves with which one you are in. Two things follow that: the petrol that went in as a proportion of what that tank takes, then the place the car is in and whether our van can get to it safely.
Ahead of any quote, not after, come three queries: your fuel that went in, its quantity, and if it has run. That is why. Given the replies, there is a straight figure instead of a range.
About Undercliffe itself
Undercliffe is a suburban area situated near Bradford in West Yorkshire, characterised by its terraced housing and inland location at an elevation of 207 metres. Undercliffe lies close to several nearby places, including Moorside, Haigh Fold, and Low Fold, and is approximately 1.5 miles from Bradford city centre. Undercliffe has a population of around 11461 residents and is part of the larger Bradford urban area.
Across West Yorkshire and around Undercliffe: fuel drain cover
Undercliffe rests in the BD postcode area, and our teams that answer petrol in diesel call-outs there work the locations near it as well — Moorside, Haigh Fold and Low Fold among them. The car doesn't need to move to us: our technicians drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Undercliffe: still at the petrol pump?
Then, you couldn't be in a better place. Call, and keep it turned off.