Alwoodley Park: Petrol in a Diesel Car? How Worried to Be
Unstarted? Then less anxious than you likely feel. Petrol resting in a diesel tank does nothing to the engine until something draws it through the system — your ignition priming your pump, your starter, or driving itself. So the fair answer to the first question everyone around Alwoodley Park asks, "have I wrecked it?", is normally no. Leave your engine off then ring Petrol in Diesel — that is how you keep it like that. Keep reading for three things: the effect petrol has inside a diesel motor, the signs of how far it has spread, and the way to make sure you don't repeat it.
What petrol in a diesel does to the motor
Passing through a motor, diesel is doing two jobs at once. It lubricates first, and only then does it burn. What stops the surfaces inside your high-pressure pump and the fuel injectors from grinding against each other is the diesel flowing through them — they're made to extremely fine tolerances.
Of those two tasks, petrol handles the first badly and the second never. The clattering comes from petrol being designed not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection your system hinges on, and any pump running on that mix is wearing itself.
The shape of the problem is clear once you put those together. The harm is done by circulation, not by contact. A tank with petrol in it 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 the fuel to your injectors downstream.
How bad is petrol in a diesel? Four situations our technicians see in Alwoodley Park
The best case there is: filled up, never started. Being on a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With that petrol held in the tank alone, it's emptied and cleaned right where it stands, and nothing more is needed.
Started for a moment, or only the ignition on. With the system primed, the lines and filter now contain petrol that came from your tank. Still generally simple: drain, flush, and the fuel filter sorted.
The pump now spent a few miles on diluted fuel — that is what driving the vehicle does. The work is that tank, your lines, the filter and fresh fuel through the entire circuit, and how hard the car was driven matters as much as how far. Short trips, such as the school run to St Paul's Catholic Primary School, a Voluntary Academy, are one thing. Getting as far as Leeds, under 5 miles away, makes a very different task — as does any distance on the A58(M), under 5 miles from Alwoodley Park, with your engine labouring hard all the way.
Rattling, an uneven idle, smoke, a throttle gone soft: driven until it complained. That's your motor telling you its fuel no longer is acting like diesel. Pull up where you are — on the verge on Lakeland Crescent, at the kerb, down a side road — and do not move it. What goes first is still the drain and flush-through, and that takes care of it, with long-term damage very uncommon when a vehicle is stopped early.
Petrol in a diesel myths Alwoodley Park drivers hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. A bigger tank of the same mixture is all you get, because topping up removes nothing. A diesel fuel system doesn't accept petrol by percentage in the way that advice assumes.
If anything, the opposite is true. Myth: "A modern diesel can cope with a bit of petrol." Lubrication counts more on current diesels, not less, because their fuel passes through more precise components at higher pressure.
One myth that catches people off guard: if it starts and drives, it must be unharmed. A petrol motor fed diesel generally will not run, and so the motorist stops and the damage stops with them. While your pump grinds, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. Running is not the same as fine.
An outdated workaround for a separate issue is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." The petrol is still inside the tank afterwards, and what it has thinned is not put back.
The next start draws petrol back round your pump out of your lines and your filter, where some of that sits once the engine has run. That's why draining your tank yourself doesn't leave you sorted — a myth. It is also truly hazardous to drain petrol into a can at the roadside.
How does petrol in a diesel occur?
Carelessness is rarely the cause, and no one means to do it. A diesel nozzle generally will not go into a petrol car, but the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake simple, and just in one direction.
Habit and the car falling out of step is how it happens. Hire cars, courtesy cars, and vehicles that are new to you. One petrol and one diesel on the driveway of the same household. A forecourt you know, only with its pumps laid out differently. A train to catch, and a rushed fill en route to Horsforth. A new-to-you diesel Peugeot 308, its first fuelling, and a driver accustomed to petrol: precisely when it occurs. Add rain, a phone call or a back seat full of children, and the hand repeats what it has always done.
Alwoodley Park motorists: how to avoid petrol in a diesel next time
- Read the pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on every forecourt. The label is what counts.
- Plenty of motors state the fuel type inside your filler flap or on the cap, so check it on your first fill in any car you do not know.
- Mark your key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember.
- It sounds silly and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away then keep your mind on the petrol pump.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler built to reject a petrol nozzle, and add-on devices are available for motors without one. They are a backstop, not a reason to stop reading the pump.
- Stop as soon as you notice. Less petrol in your tank makes a thinner mix. It does not change what to do next, which is still not to start the car.
Put petrol in a diesel around Alwoodley Park already?
The order of things is brief, then. Leave it unstarted, with your ignition switched off too. Ask the attendants to help you push it away from the petrol pump if you are still at the forecourt, whether that's Asda or somewhere else. Call 0333 366 0103 next, with three answers — your fuel, the approximate quantity, and whether it has run.
Say so if it was AdBlue instead of petrol: it is a different issue, with its own page for Alwoodley Park, since AdBlue brings corrosion and deposits rather than lost lubrication.
One petrol in a diesel task in Alwoodley Park costs more than another. Why?
Four different jobs sit behind the four situations above — which is why there is no honest single quote. Chiefly, the cost shifts with which situation you are in. Where the vehicle is matters too, and whether our van can safely get to it, after the proportion of petrol to what your tank holds.
Ahead of any quote, not after, we ask three queries: your fuel that got in, its volume, and whether it's run. That's why. With those replies, you get a straight figure rather than a range.
About Alwoodley Park and where it is
Alwoodley Park is a suburban area located in West Yorkshire, situated approximately 4.3 miles north of Leeds city centre. Alwoodley Park sits at an elevation of 158 metres, amidst the gently rolling hills of the Yorkshire landscape. Alwoodley Park is characterised by its predominantly semi-detached housing stock, with nearby amenities and open spaces such as Black Moor and Alwoodley.
Across West Yorkshire and in Alwoodley Park: fuel drain cover
Petrol in diesel calls in Alwoodley Park — part of the LS postcode area — go to teams that also cover the spots round it, Black Moor, Camp Town and Alwoodley among them. The vehicle does not need to move to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Alwoodley Park: still at the pump?
The best spot there is, then — that's where you are. Keep it off. Ring.