Should You Worry? Petrol in a Diesel Car in Stockwood
Less than you probably are, provided it has not been started. Till your ignition primes your pump, the starter turns, or the vehicle is driven, petrol in a diesel tank simply rests there and does no harm. Which makes the truthful reply to the first Stockwood question — "have I wrecked it?" — usually no. Keep it that way: leave the engine off then call Petrol in Diesel. The remainder of this page covers what petrol really does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
Inside the engine: what petrol in a diesel really does
Two tasks fall to diesel on its journey through a motor. It combusts, and before it ignites it protects. Extremely fine clearances are built into your injectors and your high-pressure pump, and only the diesel flowing through stops those surfaces grinding together.
Badly at the first, not at all at the second: that is petrol. The clattering comes from petrol being designed not to ignite when compressed, which is precisely the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips out the protection the fuel system hinges on, and any pump running on that blend is wearing itself.
Seen together, they show what shape the issue has. The harm is done by movement, not by contact. Where the petrol is only in the tank, it's an issue of fuel, nothing more. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the injectors further on.
How serious is petrol in a diesel? Four situations we see in Stockwood
Fuelled but never started — the best it gets. Being on a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With the petrol held in that tank alone, it's drained and purged on the spot, and nothing more is needed.
The ignition switched on, or a short start. The system has been bled, and so petrol has left that tank and got to your filter and the fuel lines. Drain, flush, see to the filter: still usually straightforward.
A few miles driven, and your pump has spent every one of them labouring on thinned fuel. How hard your car was driven matters as much as how far, and the work takes in the tank, the lines, the filter and clean fuel through the whole circuit. Driving the kids to Waycroft Academy is one sort of trip. Any distance on the M32, under 5 miles from Stockwood, means the engine has worked hard throughout, and a run to Bristol, under 5 miles away, is a very different task too.
Driven till it protested. Knocking, a lumpy idle, smoke, a throttle that has gone soft. That is the engine telling you its fuel no longer is behaving like diesel. Stop where you are — on the verge on Hollway Road, at the kerb, down a side road — and don't move it. A vehicle stopped soon very seldom has long-term damage, since the drain and the flush-through, which still come first, take care of it.
Petrol in a diesel myths Stockwood drivers hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing comes out when you top up — that tank just carries more of the same mixture. Percentage isn't how a diesel fuel system copes with petrol, whatever that guidance supposes.
Not so: a modern diesel copes with a bit of petrol. Rather, the opposite. More precise parts and higher pressure are the way a current diesel runs its fuel, and that makes the lubrication matter more, not less.
One myth that catches motorists out: if it starts and drives, it must be unharmed. Any petrol engine fed diesel generally won't run, so the motorist stops and the damage stops with them. A diesel fed petrol normally starts, ticks over and drives away as though nothing has happened, while your pump grinds. Fine and running aren't the same at all.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a different problem. It doesn't put back what petrol has thinned, and that petrol is still in the tank after that.
The next start sends petrol back round your pump from your lines and your filter, where some of that ends up after the motor has been run. That is why a DIY tank drain doesn't sort it — a myth. Draining petrol into a can at the kerbside is also truly dangerous.
How petrol ends up: petrol in a diesel
On purpose? Never. Through carelessness? Rarely, if ever. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle generally won't go into a petrol car at all. So the error 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. One petrol and one diesel on the drive of the same household. Your ordinary forecourt, its pumps now in a different order. A train to catch, and a hurried fill on the way to Keynsham. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist used to petrol: precisely when it occurs. Add a back seat full of children, a phone call or rain, and the hand wins.
How to avoid petrol in a diesel on your next fill-up in Stockwood
- Check the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on each forecourt. The label is what counts.
- Plenty of vehicles state the fuel inside your filler flap or on the cap, and so check it on the first fill in a vehicle 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 intending to remember.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the pump. It sounds daft and it does the trick.
- Put your phone away. This is an easy mistake to make whilst you are thinking about something else.
- Add-on devices are available for vehicles without one, and some diesels are built with a filler that won't accept a petrol nozzle. Helpful — but a backstop only, never a reason to stop checking the label.
- Less petrol means a weaker blend, and so stop as soon as you realise — though remembering that the next step is unchanged. It's still not to start the car.
Petrol already in a diesel around Stockwood? Begin here
Then the order of things is short. Don't turn your ignition on, and don't start it. Yet on the forecourt, at Murco or anywhere else? Ask the staff to help you roll it away from the pump. Then phone 0333 366 0103 and tell us what got in, about how much, and if it has run.
Corrosion and deposits are the problem with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and see its own Stockwood page.
Why one petrol in a diesel task around Stockwood costs more than another
An honest single price does not exist here: four situations, four separate tasks. What moves your cost is chiefly which of them you're in. The ratio counts next, meaning how much of the tank is petrol, followed by the location of your car and whether getting to it is safe for a technician.
That's why our engineers ask three questions before costing rather than after: what was put in, how much, and if it has run. Those answers are what change a range into one firm number.
About Stockwood
Stockwood is a suburban area located inland, approximately 3.9 miles from Bristol city centre, with an elevation of around 91 metres. Stockwood sits near the nearby places of Whitchurch, Queen Charlton, and Hicks Gate, and is characterized by its predominant semi-detached housing. Stockwood is home to a population of around 5060 residents, and is situated in the South West region of England, about 104.1 miles west of London.
Fuel drain cover across Bristol, Stockwood included
Petrol in diesel jobs in Stockwood — part of the BS postcode area — go to vans that also cover the spots round it, Whitchurch, Queen Charlton and Hicks Gate included. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots our engineers drain, and your vehicle doesn't need to come to us.
Stockwood: still at the petrol pump?
The best position there is, then — that is where you are. Ring, and keep it turned off.