Petrol in a Diesel Car in Palgrave: How Worried Should You Be?
Not started? Then less worried than you probably are. Until the ignition primes your pump, the starter turns, or the car is driven, petrol in a diesel tank simply sits there and does nothing. Which makes the honest reply to the first Palgrave question — "have I wrecked it?" — usually no. Leave the motor off then ring Petrol in Diesel — that keeps it that way. Further down, this page sets out what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
Petrol in a diesel: what does it do to the motor?
Diesel has two tasks on its way through a motor. Lubricating comes before burning; it does both. What stops the surfaces inside your high-pressure pump and the fuel injectors from wearing down against one another is the diesel passing through them — they're built to extremely fine gaps.
Of these two tasks, petrol handles the first poorly and the second not at all. A pump working on a petrol mix is wearing itself out, because petrol is thinner than diesel and strips out the protection your fuel system depends on. Petrol is also made to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that's where any knocking starts.
The shape of the issue is clear when you put those together. The harm is done by movement, not by contact. Where the petrol is only inside your tank, it is a problem of fuel, nothing more. After your pump has been running on that petrol, a mechanical problem has begun: anything shed by a pump that's wearing travels onward to the fuel injectors with your fuel.
Four scenarios our technicians see around Palgrave: how serious is petrol in a diesel?
Fuelled but not once started — as good as it gets. Only your tank has petrol in it, so the job is draining your tank and rinsing the fuel system where the vehicle stands. This scenario can only truly happen on a forecourt: anywhere else, the vehicle got there by being driven.
Ignition on, or started for a second. Once primed, the system has drawn petrol out of that tank as far as the fuel filter and the lines. Still usually easy: drain, flush, and the filter dealt with.
Driven a few miles. Now your pump has spent those miles labouring on thinned fuel. Distance is only half of it; how hard it was driven matters equally. Either way the work includes your tank, the lines, your filter and fresh fuel through the entire system. Short trips, like the school run to Palgrave Church of England Primary School, are one matter. Driving as far as Norwich, under 25 miles away, makes a very different task — as does any miles on the M11, under 50 miles from Palgrave, with your engine labouring hard the whole time.
Driven on until it complained — clattering, smoke, an uneven idle, a dead throttle. That is the engine telling you its fuel no longer is acting like diesel. Pull up where you are — on the verge on The Green, at the kerb, down a side road — and don't move it again. The fuel drain and flush still go first, and they deal with it: if a vehicle is pulled over early, long-term damage is very rare.
Petrol in a diesel stories Palgrave 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 when you top up — your tank simply carries more of the same blend. The assumption behind that advice — that diesel fuel systems accept petrol by percentage — is wrong.
"Current diesels can handle a little petrol" — a myth, and nearer the reverse. Lubrication counts more on current diesels, not less, because their fuel passes through smaller parts at higher pressure.
The myth that catches motorists off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor normally leaves a motor that will not run: the driver stops, and so does the damage. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, while your pump wears. Fine and running are not the same thing.
An outdated fix for a different fault is behind this one. Myth: "Add some two-stroke oil and drive the car home." None of what petrol diluted gets put back by it — and afterwards, the tank still holds the petrol.
If the engine has been run, part of that petrol sits in the filter and your lines, not the tank — and your next start pulls it right back through your pump. So the myth "drain the tank yourself and you are sorted" doesn't stand up. It is also truly dangerous to drain petrol into a can by the kerbside.
How petrol ends up: petrol in a diesel
Carelessness is seldom the cause, and nobody means to do it. One way only, because of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, while the diesel one generally will not fit a petrol vehicle. That is how the forecourt makes it straightforward.
Routine and the car falling out of step is when it takes place. A new car, a hire car or a courtesy car. A household with one petrol and one diesel on the drive. A familiar forecourt with the pumps in a different order. Racing for a train outside Diss and filling up en route. Years of petrol motors behind you, a diesel BMW 3 Series in front of you on the forecourt for its first tank — that is when. Add a back seat full of kids, a phone call or rain, and the hand wins.
Preventing petrol in a diesel next time you fill up around Palgrave
- A green handle for unleaded and black for diesel is usual in the UK — yet not on each forecourt. Trust the label on the pump, not the colour.
- Many cars state the fuel type inside the filler flap or on the cap, so check it on the first fill in a vehicle you do not know.
- Label your key. In a home with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It sounds daft. It works.
- Put the phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels have a filler designed to block 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 checking the petrol pump.
- Less petrol makes a thinner blend, so stop as soon as you realise — though remembering that the next stage is unchanged. It's still not to start it.
Already put petrol in a diesel in Palgrave?
Short and simple, then, is the order of things. Do not switch the ignition on, and do not fire it up. Ask the staff to help you push it clear of the petrol pump if you're still on the forecourt, whether that's Morrisons or somewhere else. Call 0333 366 0103 next, with three facts — the fuel, the approximate amount, and if it has run.
If it was AdBlue instead of petrol, say so. That is a separate problem — corrosion and deposits rather than lost lubrication — and it has its own page for Palgrave.
Palgrave petrol in a diesel jobs: why one costs more than another
The four scenarios above are four different jobs, so no single price for this would be fair. Which of them you are in is chiefly what shifts the cost. The share matters next, meaning how much of your tank is petrol, and then the location of the vehicle and whether reaching it is safe for a technician.
That's why our technicians ask three queries before quoting rather than after: what was put in, how much, and whether it has run. The replies change a range into a straight figure.
About Palgrave, briefly
Palgrave is a rural village in Suffolk, situated inland at an elevation of around 48 metres, approximately 20 miles from Norwich and 79 miles from London. Palgrave has a population of around 976 residents, with a predominance of detached housing. Palgrave is located near other small villages such as Diss, Stuston, and Thrandeston, in the eastern part of England.
Fuel drain cover in Palgrave and across Suffolk
Our vans answering petrol in diesel calls around Palgrave, in the IP postcode area, also work the locations near it, Diss, Stuston and Thrandeston included. Our engineers drain wherever your car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Palgrave: still at the petrol pump?
The best position there is, then — that's where you are. Keep it off. Ring.