Winchestown: Petrol in a Diesel Car? How Worried to Be
Provided it hasn't been started, you can worry far less than you probably are. "Have I wrecked it?" is the first thing everyone in Winchestown asks, and the honest answer is generally no, because petrol left in a diesel tank hurts nothing until it is dragged through the fuel system — by ignition priming, by the starter, or by driving. Petrol in Diesel is who to ring, with the engine left off, and so it stays that way. What petrol really does to a diesel, how to judge how far it has travelled, and how to stop it from happening a second time: that's the rest of this page.
The motor and petrol in a diesel: what goes on
Two tasks fall to diesel on its route round a motor. It ignites, and before it ignites it lubricates. What stops the surfaces inside the high-pressure fuel pump and your injectors from grinding against each other is the diesel flowing through them — they are made to extremely fine gaps.
Badly at the first, not at all at the second: that's petrol. The knocking comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication your system rests on, and any pump running on such a mixture is wearing itself.
Put those together and the shape of the issue is plain. It is circulation that does the harm, not contact. Petrol in the tank is a fuel fault. The beginning of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with your fuel to the fuel injectors downstream.
Winchestown, petrol in a diesel: four situations, from mild to serious
Filled but never started — as good as it gets. Just that tank has petrol in it, so the task is draining the tank and cleaning your system where your car stands. This scenario can only really occur on a forecourt: anywhere else, your car got there by being driven.
The ignition switched on, or a short start. With your system primed, your lines and filter now contain petrol that came from your tank. Drain, flush, deal with the filter: still usually easy.
Driven a few miles. Now your pump has spent those miles running on thinned fuel. Distance is only half of it; how hard it was driven counts just as much. Either way the work includes your tank, the fuel lines, your filter and fresh fuel through the entire system. Driving the kids to the local primary school is one kind of trip. Very different again: a trip to Newport, under 25 miles away, or some distance on the M4, under 15 miles from Winchestown, where the motor never stopped labouring hard.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. That's your motor telling you its fuel no longer is acting like diesel. Leave it where it stops: a lay-by, a side street, the verge on Waun-Ebbw Road. A car pulled over early very rarely has long-term damage, since the fuel drain and the flush-through, which still go first, sort it out.
Petrol in a diesel myths Winchestown motorists hear
False: topping up to full with diesel makes it fine. It doesn't. Topping up takes out nothing; it gives you a bigger tank of the same mixture. A diesel fuel system does not tolerate petrol by percentage in the way that advice presumes.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. A newer diesel runs its fuel through more precise parts at higher pressure, which makes the lubrication matter more, not less.
"It starts, it drives, so no harm done" — the myth that trips up more people than any other. The motorist of a petrol motor fed diesel usually has no choice but to stop, since it will not run, and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump wears. Running isn't the same as fine.
Myth: a two-stroke additive makes it safe to drive home. It is an old fix, supposed for another fault. The petrol is still in your tank after that, and what it has thinned is not put back.
The next start draws petrol back round the pump out of your lines and the fuel filter, where some of it ends up once your engine has been run. That is why draining your tank yourself does not sort it — a myth. And, a can of petrol drained at the roadside is truly hazardous.
How petrol ends up: petrol in a diesel
A careless moment is seldom the cause, and nobody means to do it. One way only, since of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, while the diesel one mostly will not fit a petrol vehicle. That's how the forecourt makes it straightforward.
When habit and the car stop matching, it happens. A vehicle that's new to you — a hire car, on loan as a courtesy car, or just bought. One petrol and one diesel on the drive of the same household. A forecourt you know, but with its pumps laid out differently. A rushed fill en route to Ebbw Vale Town with a train to catch. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is precisely the moment it happens. With rain, a call coming in, or children to deal with, the hand simply does what it always has.
Next time you fill up around Winchestown: preventing petrol in a diesel
- The label is what counts, so check the petrol pump rather than the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt.
- Many cars state the fuel type inside your filler flap or on the cap, and so check it on the first fill in a vehicle you don't know.
- Good intentions do less than a sticker or a fob in a vivid colour on your diesel's key when a household has one of each. So label it.
- It seems silly and it works: on the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the petrol pump.
- Mistakes like this are simple to make whilst your mind is on something else, and so the phone goes away.
- Add-on devices are available for motors without one, and some diesels are built with a filler that will not accept a petrol nozzle. Helpful — but a safety net only, never a reason to stop checking the label.
- Stop the moment you notice. Less petrol in that tank means a thinner mixture. It doesn't change what to do next, which is still not to fire it up.
Already put petrol in a diesel in Winchestown?
Then the order of things is short. Do not switch your ignition on, and do not crank it. The staff at the forecourt — whether at Texaco itself or wherever you filled up — will normally help roll it clear of the pump if you ask. Then ring 0333 366 0103 and tell us what was put in, about how much, and whether it has run.
Corrosion and deposits form the problem with AdBlue, where petrol means lost lubrication. So if it was AdBlue, say so — and read its own Winchestown page.
One petrol in a diesel task in Winchestown costs more than another. Why?
There is no honest single quote for this, because the four situations above are four different jobs. Chiefly, your cost shifts with which situation you are in. The proportion counts next, meaning how much of the tank is petrol, and then the location of your car and whether reaching it is safe for a technician.
Three questions come first, before any quote, rather than after — what went in, how much, has it run — and this is the reason. The answers turn a range into a straight figure.
About Winchestown itself
Winchestown is a suburban area situated in the county of Blaenau Gwent, within the inland regions of south Wales. Winchestown sits at an elevation of 345 metres, overlooking the surrounding countryside. Winchestown is characterized by its predominantly semi-detached housing stock, reflecting the residential development of the area. Winchestown is located near other local communities, including Garn Fach and Nantyglo.
Fuel drain cover around Winchestown and across Blaenau Gwent
Petrol in diesel call-outs in Winchestown — part of the NP postcode area — go to teams that also cover the places around it, Garn Fach, Twyn Cynhordy and Nantyglo included. We drain where the vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Still at the petrol pump around Winchestown?
Then you are in the best spot there is. Keep it off. Ring.