Petrol in a Diesel Car in Browns Green: How Worried Should You Be?
Provided it hasn't been started, you can worry less than you likely are. Petrol resting in a diesel tank does nothing to your motor till something pulls it through the fuel system — the ignition priming the pump, your starter, or driving itself. So the honest answer to the first query everyone in Browns Green asks, "have I wrecked it?", is generally no. Petrol in Diesel is who to phone, with the motor kept off, so it stays that way. What petrol really does to a diesel, how to judge how far it's gone, and how to keep it from happening a second time: that's the rest of this page.
Your engine and petrol in a diesel: what happens
Passing through an engine, diesel does two jobs at the same time. Lubricating comes before burning; it does both. What stops the surfaces inside your high-pressure pump and the fuel injectors from wearing down against each other is the diesel passing through them — they're made to extremely fine clearances.
Petrol handles the first job poorly and the second not at all. It's runnier than diesel and strips away the protection your fuel system rests on, and so a pump running on a petrol blend is a pump wearing itself. And petrol is made to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That's where the clattering comes from.
The shape of the problem is plain when you put those together. The damage is done by movement, not by contact. Any tank with petrol in it is a fuel problem. The start of a mechanical one is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with your fuel to your injectors downstream.
Four situations our technicians see around Browns Green: how bad is petrol in a diesel?
Fuelled, and never started: no case is better. That petrol is inside the tank and just that tank, and the job is a drain and a flush where the car sits. This is the one situation that can only really take place at a forecourt, since anywhere else your car has been driven to get there.
The ignition switched on, or a brief start. Your system has been bled, and so petrol has left your tank and reached the fuel filter and the fuel lines. Normally little more than emptying, rinsing and sorting the fuel filter, and so still easy.
Your pump now worked a few miles on thinned fuel — that is what driving the vehicle meant. How hard your car was driven counts as much as how far, and this work covers the tank, your lines, the fuel filter and clean fuel through the entire system. Driving the children to Grestone Academy is one sort of trip. Very different again: a trip to Birmingham, under 5 miles away, or some mileage on the M5, under 3 miles from Browns Green, where the motor never stopped working hard.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone uneven. The fuel is not behaving like diesel any more, and the motor is saying so. Stop where you are — on the verge on Beechglade, at the kerb, down a side road — and do not move it. A car pulled over quickly very seldom has lasting damage, since the drain and the flush, which still come first, sort it out.
Petrol in a diesel stories Browns Green motorists hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing is removed by topping up — you're left with a fuller tank, still the same mix. That guidance assumes a diesel fuel system handles petrol by percentage. It doesn't.
Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. Finer parts and higher pressure are the way a modern diesel runs its fuel, and that makes the lubrication matter more, not less.
This is the one that catches drivers. Myth: "If it starts and drives, there's no harm done." Feed diesel to a petrol motor and it usually won't run, so the driver stops — and the damage stops with them. Feed petrol to a diesel and it usually fires up, idles and drives away like nothing happened — all while its pump is wearing. Being able to run is not proof of being fine.
Myth: a two-stroke additive makes it safe to drive home. It is an old fix, supposed for another issue. It does not put back what petrol has thinned, and the petrol is still inside your tank afterwards.
Myth: "Drain the tank yourself and you're sorted." Once your engine has run, some of that petrol is no longer inside your tank: it is in your filter and the fuel lines, and it goes right back through the pump on your next start. It's also truly hazardous to drain petrol into a can at the kerbside.
Petrol in a diesel: how does it occur?
On purpose? Never. Through carelessness? Seldom, if ever. A diesel nozzle generally will not go into a petrol motor, yet the smaller petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake straightforward, and just in that direction.
The moment habit stops matching the car is the moment it happens. A new car, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. The pumps in a different order on a well-known forecourt. Fuelling up in a hurry en route to Hamstead, 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 kids, a phone call or rain, and habit takes over.
Next time you fill up around Browns Green: avoiding petrol in a diesel
- Not every forecourt in the UK follows green for unleaded and black for diesel, even if most usually do. Read the pump's label; the colour is just a hint.
- Plenty of cars state the fuel inside the filler flap or on the cap, so check it on your first fill in a vehicle you do not know.
- Good intentions do less than a sticker or a fob in a bright colour on the diesel's key if a household has one of each. So label it.
- It seems daft and it works: on the first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away and keep your mind on the pump.
- Some diesels have a filler built to block a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the pump.
- Less petrol makes a weaker blend, and so stop as soon as you notice — though remembering that your next step is unchanged. It's still not to fire it up.
Browns Green: already put petrol in a diesel?
Then the order of things is brief. Don't start it, and do not turn the ignition on. Still on the forecourt, at Esso or anywhere else? Ask the staff to help you roll the vehicle clear of the petrol pump. Then call 0333 366 0103 and tell us what got in, about how much, and if it's run.
If it was AdBlue instead of petrol, say so. That's a separate issue — corrosion and deposits and not lost lubrication — and it has its own page for Browns Green.
Why one petrol in a diesel job around Browns Green costs more than another
Four different tasks lie behind the four situations above — which is why there is no honest single price. The scenario itself does most of the work of moving the cost. Two things come after that: the petrol that went in as a share of what the tank holds, then the spot the vehicle is in and whether our van can get to it safely.
Three questions come first, before quoting, rather than after — what was put in, how much, has it run — and that is the reason. Their answers are what change a range into one firm number.
About Browns Green and its setting
Browns Green is a locality in the West Midlands, situated approximately 3 miles north of Birmingham city centre. Browns Green sits at an elevation of around 136 metres, in a predominantly residential area with a mix of housing types, although semi-detached homes are most common. Browns Green is close to nearby places such as Handsworth Wood, Perry Barr, and Handsworth, and is home to around 5176 residents. Browns Green forms part of the larger Birmingham urban area, with the city's amenities and services within easy reach.
Across West Midlands and in Browns Green: fuel drain cover
Petrol in diesel jobs in Browns Green — part of the B postcode area — go to vans that also cover the spots round it, Handsworth Wood, Perry Barr and Handsworth among them. A forecourt, a supermarket car park, a lay-by or your own drive are all locations our technicians work, and your car doesn't need to move to us.
Still at the pump around Browns Green?
No position is better: that's where you now are. Keep it turned off, then ring.