How Worried Should You Be? Petrol in a Diesel Car in West Chiltington
Far less than you probably are, if it hasn't been started. "Have I ruined it?" is the first question anyone in West Chiltington asks, and the honest answer is usually no, since petrol resting in a diesel tank hurts nothing till it's drawn through your fuel system — by ignition priming, by your starter, or by being driven. Leave your motor off and ring Petrol in Diesel — that is how you keep it like that. Further down, you will find what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you a second time.
Petrol in a diesel: what does it do to the engine?
Two tasks fall to diesel on its route round a motor. Oiling comes before burning; it does both. What keeps the surfaces inside the high-pressure pump and the fuel injectors from grinding against each other is your diesel flowing through them — they are made to extremely fine gaps.
Poorly at the first, not at all at the second: that's petrol. It is runnier than diesel and takes away the protection the system hinges on, and so a pump running on a petrol mixture is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the clattering comes from.
Put those together and the shape of the trouble is plain. The harm is done by movement, not by contact. All a tank with petrol in it amounts to is a fuel issue. The start of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with the fuel to the fuel injectors downstream.
How serious is petrol in a diesel? Four situations our technicians see in West Chiltington
Fuelled up, not once started. The best case there can be. Being at a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With the petrol held inside the tank alone, it's drained and purged on the spot, and nothing more is needed.
A moment's running, or merely your ignition on. Petrol has left that tank and got to the filter and the lines, because the fuel system has been primed. Still generally easy: drain, flush, and the filter sorted.
Your pump has spent a couple of miles on weakened fuel — that is what driving the car meant. How hard your car was driven matters as much as how far, and this work covers the tank, your lines, your filter and clean fuel through the entire system. Short trips, like the school run to West Chiltington Community Primary School, are one matter. Any distance on the M23, under 15 miles from West Chiltington, means the engine has worked hard throughout, and a run to Brighton and Hove, under 25 miles away, is a very different job too.
It complained, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone uneven. What you are hearing is your engine reporting fuel that no longer behaves like diesel. Leave it wherever it stops: a lay-by, a side street, the verge on Broadford Bridge Road. Permanent damage is very rare if a car is pulled over quickly, and the drain and flush that still go first deal with it.
West Chiltington motorists and the petrol in a diesel stories they hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Topping up removes nothing; it gives you a fuller tank of the same mix. A diesel fuel system does not tolerate petrol by percentage in the way that advice assumes.
Not so: a current diesel copes with a bit of petrol. Rather, the reverse. At higher pressure, through finer parts: that's how a current diesel handles its fuel, so the lubrication counts more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that catches drivers. The driver of a petrol motor fed diesel normally has no choice but to stop, because it will not run, and the damage stops there. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile the pump wears. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It's an outdated fix for a different problem. It doesn't put back what petrol has diluted, and that petrol is still inside that tank later.
Myth: "Drain your tank yourself and you are sorted." Once the engine has been run, some of that petrol is no longer in that tank: it's in the filter and your lines, and it goes straight back through the pump at your next start. Also, a can of petrol filled at the kerbside is truly dangerous.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. A diesel nozzle mostly won't fit a petrol motor, yet the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error straightforward, and just in that direction.
Routine and the car falling out of step is when it happens. Courtesy car, hire car, or a motor that is brand new. Households running one of each, petrol and diesel. Your usual forecourt, its pumps suddenly in a different order. A train to catch, and a rushed fill en route to Pulborough. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that's when. Add rain, a phone call or a back seat full of kids, and the hand does what it has always done.
Avoiding petrol in a diesel next time you fill up around West Chiltington
- Read 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.
- Check your filler flap. Plenty of cars state the fuel type inside the flap or on the cap. Look at it on the first fill in a motor you don't know.
- Good intentions do less than a sticker or a fob in a vivid colour on the diesel's key if a home has one of each. So mark it.
- "Diesel", out loud, before you lift the nozzle — every time a new or hired car gets its first tank. It seems silly. It does the trick.
- Mistakes like this are easy to make whilst your mind is on something else, so the phone goes away.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to refuse a petrol nozzle, and add-on devices exist for the remainder. Treat it as a safety net, then keep reading the pump.
- As soon as you notice, stop: less petrol in that tank means a weaker mixture. What to do next does not change, though — still do not fire it up.
Put petrol in a diesel around West Chiltington already?
In that case, there is only a short order of things. Do not start it, and don't switch your ignition on. If you're still on the forecourt — JET or anywhere else — ask the staff to help you push it clear of the pump. Then call 0333 366 0103 and tell us what was put in, roughly how much, and if it has run.
Corrosion and deposits form the issue with AdBlue, where petrol means lost protection. So if it was AdBlue, say so — and read its own West Chiltington page.
Why one petrol in a diesel task around West Chiltington costs more than another
Four different jobs lie behind the four scenarios above — which is why there's no fair single price. What shifts your cost is chiefly which of them you are in. Where the vehicle is counts too, and whether our van can safely reach it, after the share of petrol to what that tank takes.
That is why we ask three queries before quoting instead of after: what got in, how much, and whether it's run. A range becomes a straight figure once those replies are in.
About West Chiltington and where it is
West Chiltington is a small village in West Sussex, situated in a rural area with nearby West Chiltington Common and Nutbourne Common. West Chiltington sits at an elevation of around 50 metres, with detached housing being the predominant type of accommodation. West Chiltington is located near the village of Nutbourne and is close to the larger urban area of Brighton and Hove, which is approximately 16 miles away. West Chiltington has a population of around 623 residents.
Fuel drain cover across West Sussex, West Chiltington included
Petrol in diesel call-outs around West Chiltington — part of the RH postcode area — go to teams that likewise cover the places about it, West Chiltington Common, Nutbourne and Nutbourne Common included. We drain wherever your vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Still at the pump in West Chiltington?
No position is better: that is where you are. Keep it off. Phone.