How Worried Should You Be? Petrol in a Diesel Car in Holly Bank
If it hasn't been started, worry less than you probably are. 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 honest reply to the first Holly Bank query — "have I ruined it?" — normally no. Keep it that way: leave your engine off and phone Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it's gone, and how to keep it from happening again: that's the remainder of this page.
The motor and petrol in a diesel: what happens
Passing through an engine, diesel does two jobs at the same time. It protects first, and only then does it burn. Made to extremely fine clearances, your injectors and the pump depend on your diesel flowing through them to keep their surfaces from wearing against one another.
Of those two jobs, petrol handles the first badly and the second not at all. Being less viscous than diesel, petrol strips away the protection a fuel system needs, so a pump running on that mixture wearing itself. It's equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the clattering.
Put these together and the shape of the trouble is clear. Contact does not do the harm — circulation does. Where that petrol is only in your tank, it's a problem of fuel, nothing more. After the pump has been labouring on that petrol, a mechanical fault has started: anything shed by a pump that is wearing down is carried onward to the fuel injectors with your fuel.
Petrol in a diesel in Holly Bank: how serious is it? Four situations
Fuelled, and not started: no case is better. Just your tank has petrol in it, and so the job is emptying your tank and flushing the system where the car sits. This scenario can only truly happen on a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or merely the ignition on. Once primed, your system has pulled petrol from your tank as far as the fuel filter and the fuel lines. That is generally still a straightforward task — a drain, a flush, and the fuel filter dealt with.
Driven a few miles. Now your pump has spent those miles working on thinned fuel. Mileage is only half of that; how hard it was driven counts just as much. Either way this work runs to your tank, your lines, the fuel filter and clean fuel through the entire circuit. Short trips, like the school run to Castlefort Academy, are one matter. Driving as far as Lichfield, under 10 miles away, makes a very different task — as does any miles on the M6 Toll, under 3 miles from Holly Bank, with the engine working hard the whole time.
Clattering, an uneven idle, smoke, a throttle gone soft: driven until it complained. The engine is telling you your fuel is no longer behaving like diesel. Stop wherever you are — the verge on Castle Road, a lay-by, a side street — and leave it there. Lasting damage is very uncommon if a vehicle is stopped early, and the drain and flush that still come first deal with it.
Myths Holly Bank motorists hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — your tank just carries more of the same mixture. A diesel fuel system does not tolerate petrol by percentage in the way that guidance presumes.
Not so: a modern diesel copes with a bit of petrol. Rather, the reverse. Protection matters more on modern diesels, not less, because their fuel runs through smaller components at higher pressure.
This is the one that catches drivers. Myth: "If it starts and drives, there's no harm done." Feed diesel to a petrol engine and it usually will not run, and so the driver stops — and the damage stops with them. Feed petrol to a diesel and it normally fires up, idles and pulls away like nothing happened — all the while its pump wears. Running is not the same as fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It's an old workaround for a different fault. What petrol has weakened stays diluted, and the petrol remains inside that tank anyway.
"Drain it yourself and you're sorted" — a myth, since after it's been running some petrol sits in the filter and lines, waiting to go straight back through the pump on your next start. And, a can of petrol drained by the kerbside is truly dangerous.
How petrol ends up: petrol in a diesel
It's seldom 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, whereas the diesel one generally won't fit a petrol vehicle. That's how the forecourt makes it easy.
It takes place when routine and your car stop matching. A motor that's new to you — hired, on loan as a courtesy car, or brand new. One petrol and one diesel on the drive of the same household. A forecourt you know, only with its pumps laid out differently. A rushed fill on the way to Shenstone with a train to catch. A new-to-you diesel Renault Megane, its first fuelling, and a driver accustomed to petrol: exactly when it happens. Throw in a back seat full of kids, a phone call or rain, and the hand takes over.
How to prevent petrol in a diesel at your next fill-up in Holly Bank
- The label is what counts, and so check the petrol pump instead of the colour: in the UK unleaded handles are usually green and diesel black, yet not on each forecourt.
- Check the filler flap. Many cars state the fuel type inside the flap or on the cap. Look at it on the first fill in any vehicle you don't know.
- Good intentions do less than a sticker or a fob in a bright colour on your diesel's key if a house has one of each. So label it.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump. It sounds silly and it works.
- Put your phone away. This is an easy mistake to make whilst you are thinking about something else.
- Some diesels come with a filler built to refuse a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the petrol pump.
- The moment you notice, stop: less petrol in your tank means a weaker mix. What to do next does not change, though — still don't fire it up.
Put petrol in a diesel around Holly Bank already?
Then, there is only a short order of things. Leave it unstarted, with the ignition switched off as well. Ask the attendants to help you push it away from the pump if you're still at the forecourt, whether that is Shell or somewhere else. Next, 0333 366 0103. We will ask what got in, roughly how much, and if it's been run.
If it was AdBlue rather than petrol, say so. That's a separate problem — corrosion and deposits instead of lost lubrication — and it has its own page for Holly Bank.
Holly Bank petrol in a diesel jobs: why one costs more than another
Four different jobs sit behind the four situations above — which is why there's no honest single quote. What moves the cost is chiefly which of them you are in. The share counts next, meaning how much of that tank is petrol, and then the location of the vehicle and whether reaching it is safe for a van.
That's why our engineers ask three queries before pricing rather than after: what went in, how much, and whether it has run. A range becomes a straight figure when those replies are in.
About Holly Bank
Holly Bank is a suburban area in the West Midlands, situated approximately 5.7 miles from Lichfield and 108.5 miles northwest of London. Holly Bank sits at an elevation of 169 metres, surrounded by nearby places such as Vigo, Walsall Wood, and Leighswood. Holly Bank has a population of around 4520 residents, predominantly living in semi-detached housing.
Fuel drain cover across West Midlands, Holly Bank included
Holly Bank waits in the WS postcode area, and the teams that answer petrol in diesel call-outs there work the places near it as well — Vigo, Walsall Wood and Leighswood among them. We drain where the vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
In Holly Bank and still at the pump?
No position is better: that's where you are. Turned off it remains; then phone.