Petrol in a Diesel Car in Charlbury: How Worried Should You Be?
Probably less than you already are — as long as nobody has started the car. Until your ignition primes the pump, the starter cranks, or the car is driven, petrol in a diesel tank just sits there and does nothing. Which makes the truthful reply to that first Charlbury query — "have I ruined it?" — usually no. Petrol in Diesel is who to phone, with the motor left off, and so it remains that way. Keep reading for three things: the effect petrol has inside a diesel engine, the clues of how far it has got, and the way to make sure you never repeat it.
Petrol in a diesel: what does it do to the engine?
On its way through a motor, diesel does two jobs. Before it burns, it lubricates — then it ignites. Very fine clearances are built into your injectors and the high-pressure pump, and only your diesel running through keeps those surfaces from grinding together.
Poorly at the first, not at all at the second: that's petrol. The rattling 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 out the protection the system hinges on, and any pump working on such a mixture is wearing itself.
Combined, those leave the shape of the trouble plain. The damage is done by movement, not by contact. Petrol in a tank is a fuel issue. Whatever a worn pump sheds travels on, carried by the fuel, into the fuel injectors further along, which is why a pump that has been working on the petrol is where a mechanical problem starts.
Four scenarios we see around Charlbury: how serious is petrol in a diesel?
Fuelled up, not once started. The best case there is. The petrol is in your tank and just that tank, and the job is a drain and a flush where the vehicle sits. This is the one scenario that can only truly occur at a forecourt, as anywhere else the car has been driven to get there.
The ignition switched on, or a short start. The system has been bled, so petrol has left that tank and got to the fuel filter and the lines. Drain, flush, see to the fuel filter: still usually simple.
Those few miles driven meant your pump labouring on fuel weakened by petrol the whole way. Distance is only half of that; how hard it was driven matters just as much. Either way this work runs to the tank, the lines, the fuel filter and fresh fuel through the entire circuit. Short trips, like the school run to Charlbury Primary School, are one matter. A run as far as Oxford, under 15 miles away, is a very different task. So is any distance on the M40, under 15 miles from Charlbury, where your engine has been labouring hard the whole time.
Driven until it complained. Rattling, a lumpy idle, smoke, a throttle that has gone soft. The fuel isn't acting like diesel any more, and your engine is telling you. Whether it is the verge on Browns Lane, a lay-by or a side street, stop there then leave it. Permanent damage is very uncommon when a car is pulled over soon, and the drain and flush-through that still go first sort it out.
Petrol in a diesel stories Charlbury drivers hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up takes out nothing; it gives you a bigger tank of the same mix. Percentage is not how a diesel fuel system tolerates petrol, whatever that guidance assumes.
Myth: "A newer diesel can cope with a bit of petrol." If anything, the opposite. A current diesel runs its fuel through smaller components at higher pressure, which makes the protection matter more, not less.
The myth that catches people out: if it starts and drives, it must be unharmed. A petrol motor fed diesel normally will not run, so the motorist stops and the harm stops with them. While the pump wears, a diesel fed petrol normally starts, idles and drives away as though nothing has happened. A running engine doesn't mean fine.
Not so: a two-stroke additive lets you to drive home. It was an old fix, supposed for another problem. It doesn't put back what petrol has thinned, and the petrol is still in your tank afterwards.
Myth: "Drain the tank yourself and you're sorted." After the motor has run, some of that petrol is no longer in the tank: it is in the filter and your lines, and it goes straight back through your pump on your next start. Draining petrol into a can at the roadside is also really risky.
How petrol ends up: petrol in a diesel
Nobody does it on purpose, and it is seldom carelessness. One way only, since of the nozzles: the smaller petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol car. That is how the forecourt makes it simple.
The moment habit stops matching the car is the moment it happens. Courtesy car, hire car, or a vehicle that is new. One petrol and one diesel on the drive of the same household. The pumps in a different order on a familiar forecourt. Fuelling up in a hurry on the way to the nearest station, with a train to catch. Years of petrol motors behind you, a diesel Nissan Qashqai in front of you at the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of children, and your hand does what it has always done.
Next time you fill up around Charlbury: avoiding petrol in a diesel
- The label is what matters, 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.
- The first fill in a strange vehicle is the time to check the filler flap — inside it, or on the cap, plenty of cars state which fuel to use.
- Good intentions count for less than a sticker or a fob in a vivid colour on the diesel's key if a house 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" aloud before you take the nozzle off the petrol pump.
- Tuck the phone away. This is an easy mistake to make whilst you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to reject a petrol nozzle, and add-on devices are available for motors without one. They are a safety net, not a reason to stop checking the petrol pump.
- As soon as you notice, stop: less petrol inside your tank makes a weaker blend. What to do next does not change, though — still don't fire it up.
Petrol already in a diesel around Charlbury? Begin here
The order of things is brief, then. Never start the vehicle, and don't switch your ignition on. Still at the forecourt, at Texaco or anywhere else? Ask the staff to help you push the vehicle clear of the petrol pump. Call 0333 366 0103 next, with three answers — the fuel, the rough amount, and whether it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different problem — Charlbury has a page just for it.
One petrol in a diesel task in Charlbury costs more than another. Why?
There's no fair single price for this, since the four scenarios above are four separate jobs. Which of them you are in is mostly what moves your cost. After that it is the share — how much petrol was put in against how much that tank takes — and then where the car is and whether a technician can get to it safely.
What went in, how much, and if it's run — three questions our technicians ask before quoting, not after, for precisely that reason. Given those answers, there is a straight figure instead of a range.
About Charlbury, for a moment
Charlbury is a small town in Oxfordshire, situated on the banks of the River Evenlode at an elevation of around 111 metres. Charlbury lies near the Cotswold Area of Outstanding Natural Beauty, close to the villages of Spelsbury, Taston, and Fawler. Charlbury has a mix of housing types, with semi-detached homes being particularly prevalent. Charlbury is located approximately 12.7 miles from Oxford and 63.3 miles from London.
Across Oxfordshire and around Charlbury: fuel drain cover
The teams answering petrol in diesel jobs in Charlbury, in the OX postcode area, also work the places near it, Spelsbury, Taston and Fawler among them. No need to move your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all places we drain.
Charlbury: still at the petrol pump?
Then, you couldn't be in a better spot. Phone, and leave it switched off.