Should You Worry? Petrol in a Diesel Car in Woodhouse Carr
If it hasn't been started, you can worry less than you probably are. Till your ignition primes the pump, your starter cranks, or the car is driven, petrol in a diesel tank simply waits there and does nothing. Which means the truthful reply to that first Woodhouse Carr question — "have I ruined it?" — usually no. Petrol in Diesel is who to phone, with the motor left off, so it stays that way. What petrol actually does to a diesel, how to judge how far it's gone, and how to keep it from happening again: that is the rest of this page.
Petrol in a diesel: what does it do to your engine?
On its way through a motor, diesel has two tasks. Before it combusts, it protects — and then it combusts. Extremely fine clearances are built into the injectors and the high-pressure fuel pump, and just your diesel running through stops their surfaces grinding together.
The second task petrol doesn't do at all, and the first it does badly. A pump running on a petrol blend is wearing itself out, because petrol is thinner than diesel and takes away the protection the fuel system depends on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where the rattling comes.
Seen together, they show the shape the issue has. The damage is done by movement, not by contact. Petrol in a tank is a fuel fault. A pump that has been working on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with the fuel to your injectors further on.
Petrol in a diesel in Woodhouse Carr: how bad is it? Four situations
Fuelled up, never started. The best case there can be. Being on a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With that petrol kept in your tank alone, it's cleared and flushed right where it stands, and nothing more is needed.
Your ignition switched on, or a short start. Petrol has left the tank and got to the fuel filter and the fuel lines, since the system has been primed. That is usually still a simple job — a drain, a flush, and your filter dealt with.
Those few miles driven were the pump running on fuel diluted by petrol the whole way. Distance is only half of that; how hard it was driven counts equally. Either way the work runs to that tank, your lines, the filter and fresh fuel through the whole system. Short trips, such as the school run to Quarry Mount Primary School, are one matter. Any miles on the A58(M), under a mile from Woodhouse Carr, means the motor has worked hard throughout, and a run to Leeds, under a mile away, is a very different task as well.
Driven until it protested. Rattling, a lumpy idle, smoke, a throttle that has gone soft. The fuel is not acting like diesel any more, and the engine is telling you. Leave it where it has stopped: a lay-by, a side street, the verge on Cambridge Road. The fuel drain and flush-through still come first, and they sort it out: if a vehicle is pulled over quickly, permanent damage is very uncommon.
Stories Woodhouse Carr people hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. Nothing comes out when you top up — your tank just carries more of the same blend. That guidance assumes a diesel fuel system handles petrol by percentage. It doesn't.
If anything, the reverse is true. Myth: "A newer diesel can cope with a bit of petrol." Smaller components and higher pressure are the way a newer diesel runs its fuel, and that makes the lubrication count more, not less.
One myth that catches people out: if it starts and drives, it must be unharmed. Feed diesel to a petrol engine and it usually will not run, and so the motorist stops — and the harm stops with them. A diesel fed petrol usually starts, idles and drives away as if nothing has happened, while the pump wears. Running is not the same as fine.
An old fix for a different issue is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." The petrol is still inside your tank afterwards, and what it has thinned isn't put back.
Once the engine has run, part of the petrol sits in the filter and your lines, not the tank — and the next start sends it right back through your pump. So the myth "drain the tank yourself and you are sorted" doesn't stand up. It is also genuinely dangerous to drain petrol into a can by the roadside.
How petrol ends up: petrol in a diesel
Nobody does it on purpose, and it is rarely carelessness. A diesel nozzle mostly won't fit a petrol motor, yet the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error straightforward, and just in one direction.
The moment routine stops matching the car is the moment it takes place. A new vehicle, a hire car or a courtesy car. Two vehicles on one driveway, one petrol, one diesel. A forecourt you know, but with its pumps laid out differently. Fuelling up in a rush en route to Leeds, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. Throw in a back seat full of children, a phone call or rain, and the hand wins.
Avoiding petrol in a diesel next time you fill up in Woodhouse Carr
- Read the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, yet not on every forecourt. The label is what counts.
- The first fill in a strange motor is the time to check the filler flap — on it, or on the cap, many motors state which fuel to use.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key when a home has one of each. So label it.
- It seems silly and it does the trick: on the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Mistakes like this are easy to make while your mind is on something else, so your phone goes away.
- Add-on devices are available for motors without one, and some diesels are built with a filler that won't take a petrol nozzle. Useful — but a backstop only, never a reason to stop checking the label.
- Noticing it halfway? Stop at once. A thinner blend follows from less petrol in that tank, yet your next step stays the same: do not start the car.
Woodhouse Carr: already put petrol in a diesel?
In that case, there's just a short order of things. Leave it unstarted, with your ignition switched off as well. If you're still on the forecourt — Jet or anywhere else — ask the staff to help you push the vehicle away from the petrol pump. Then phone 0333 366 0103 and tell us what got in, roughly how much, and if it's run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a different problem — Woodhouse Carr has a page all for it.
What makes one Woodhouse Carr petrol in a diesel job cost more than the next
An honest single quote does not exist here: four situations, four separate jobs. The scenario itself does most of the work of moving the cost. Two things follow that: the petrol that was put in as a proportion of what the tank holds, then the spot the vehicle is in and whether a van can get to it safely.
What went in, how much, and whether it has run — three questions our engineers ask before costing, not after, for exactly that reason. Given the answers, there is a straight figure rather than a range.
About Woodhouse Carr, for a moment
Woodhouse Carr is a suburban area in West Yorkshire, situated near the River Aire and close to the city centre of Leeds. Woodhouse Carr has a mix of terraced housing and local amenities, with the area being approximately 51 metres above sea level. Woodhouse Carr is located near several other suburbs, including Buslingthorpe and Woodhouse, and is within walking distance of Leeds city centre.
Woodhouse Carr and West Yorkshire: where our fuel drain cover reaches
Our teams answering petrol in diesel calls around Woodhouse Carr, in the LS postcode area, also work the locations near it, Buslingthorpe, Bagby Fields and Woodhouse among them. You need not bring the car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all places we drain.
In Woodhouse Carr and still at the pump?
The best place there is, then — that is where you are. Keep the car turned off, then ring.