How Worried Should You Be? Petrol in a Diesel Car in Hatherleigh
Probably less than you already are — provided nobody has started it. Until the ignition primes the pump, the starter turns, or the car is driven, petrol in a diesel tank just rests there and does no harm. Which means the honest reply to that first Hatherleigh query — "have I ruined it?" — usually no. Leave the engine off then call Petrol in Diesel — that keeps it that way. What petrol really does to a diesel, how to gauge how far it's gone, and how to keep it from happening a second time: that is the remainder of this page.
The motor and petrol in a diesel: what happens
Diesel has two jobs on its way through an engine. Oiling comes before burning; it does both. Your high-pressure pump and the injectors are made to very fine clearances, and the diesel passing through them is what keeps those surfaces from grinding against each other.
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 precisely the opposite of what a diesel needs. On top of that it is thinner than diesel, it strips away the lubrication the fuel system rests on, and any pump running on such a mix is wearing itself.
Seen together, they make clear the shape the problem has. It's circulation that does the damage, not contact. Any tank with petrol in it is a fuel problem. Whatever a worn pump sheds travels on, carried by your fuel, into the fuel injectors downstream, which is why a pump that has been working on that petrol is where a mechanical issue begins.
How serious is petrol in a diesel? Four scenarios our engineers see around Hatherleigh
Fuelled up, not once started. The best case there is. Being at a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With that petrol kept in your tank alone, it is drained and rinsed on the spot, and nothing more is needed.
Your ignition switched on, or a short start. Petrol has come out of that tank and reached your filter and your lines, since the system has been primed. Still usually easy: drain, flush, and your filter seen to.
Those few miles on the road meant the pump working on fuel weakened by petrol throughout. Tank, lines, filter, then clean fuel put through the entire system: that's the work, and the way your car was driven matters as much as the miles. Driving the kids to Hatherleigh Community Primary School is one kind of trip. Any distance on the M5, under 50 miles from Hatherleigh, means the motor has worked hard throughout, and a run to Exeter, under 25 miles away, makes a very different task too.
Driven until it complained. Rattling, an uneven idle, smoke, a throttle that has gone soft. The fuel isn't acting like diesel any more, and your engine is saying so. Whether it is the verge on Hole Court, a lay-by or a side road, stop where you are then leave it. Permanent damage is very unusual if a car is stopped soon, and the fuel drain and flush-through that still come first sort it out.
Myths Hatherleigh motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Topping up removes nothing; it gives you a bigger tank of the same mix. That advice supposes a diesel fuel system tolerates petrol by percentage. It doesn't.
If anything, the opposite holds. Myth: "A newer diesel can cope with a bit of petrol." At higher pressure, through smaller components: that's how a modern diesel handles its fuel, so the lubrication matters more, not less.
Myth: "If it starts and drives, there is no damage done." This is the one that fools people. Feed diesel to a petrol motor and it usually will not run, so the driver stops — and the harm stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile your pump grinds. Being able to run isn't the same as being fine.
An old workaround for a distinct fault is behind this one. Myth: "Add some two-stroke oil and drive it home." What petrol has thinned remains diluted, and the petrol stays inside that tank regardless.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in the filter and lines, waiting to go straight back through the pump at the next start. Besides, petrol drained into a can by the road is genuinely hazardous.
Why petrol in a diesel takes place at all
It is rarely carelessness, and no one does it on purpose. One way only, since of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, while the diesel one mostly won't fit a petrol vehicle. That's how the forecourt makes it easy.
When habit and the vehicle stop matching, it takes place. Hire cars, courtesy cars, and cars that are new to you. Two vehicles on one driveway, one petrol, one diesel. The pumps in a different order on a well-known forecourt. A rushed fill on the way to Okehampton with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist used to petrol: exactly when it takes place. The hand does what it has always done once you add rain, a phone call or a back seat full of kids.
Avoiding petrol in a diesel next time you fill up in Hatherleigh
- 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.
- Inspect the filler flap. Plenty of cars state the fuel inside the flap or on the cap. Look at it on your first fill in any motor you don't know.
- A coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember, in a household with one of each.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. It seems daft and it works.
- Put the phone away. This is an easy mistake to make whilst you are thinking about something else.
- Some diesels have a filler built to block a petrol nozzle, and devices you can add are available for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the pump.
- Less petrol makes a thinner mix, and so stop as soon as you realise — while remembering that the next stage is unchanged. It's still not to crank it.
Already put petrol in a diesel in Hatherleigh?
Short and simple, then, is the order of things. Starting it is out, and so is turning on your ignition. Ask the staff to help you roll it away from the pump if you're still on the forecourt, whether that's Texaco or somewhere else. Next, 0333 366 0103. We will ask what got in, roughly how much, and if it has been run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a separate fault — Hatherleigh has a page all for it.
What makes one Hatherleigh petrol in a diesel task cost more than the next
There is no fair single quote for this, since the four scenarios above are four different tasks. Which of them you are in is mostly what moves the cost. The share matters next, meaning how much of that tank is petrol, followed by the location of your car and whether reaching it is safe for a technician.
That's why we ask three queries before pricing rather than after: what was put in, how much, and whether it's run. With those replies, you get a straight figure rather than a range.
About Hatherleigh
Hatherleigh is a small village in Devon, situated on the banks of a river at an elevation of around 81 metres. Hatherleigh has a mix of housing types, with terraced houses being particularly prevalent, and is located near other local places such as Fishleigh and Bondstones. Hatherleigh is close to the city of Exeter, which is approximately 24.6 miles away, and is around 177.3 miles from London.
Hatherleigh and Devon: where our fuel drain cover reaches
Petrol in diesel call-outs around Hatherleigh — part of the EX postcode area — go to vans that likewise cover the locations round it, Fishleigh, Fishleigh Castle and Bondstones included. The vehicle does not need to move to us: our engineers drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
In Hatherleigh and still at the petrol pump?
Then you are in the best position there is. Keep it off. Phone.