How Worried Should You Be? Petrol in a Diesel Car in South Ham
Probably less than you already are — as long as no one has started it. Till the ignition primes your pump, the starter cranks, or your car is driven, petrol in a diesel tank just rests there and does no harm. Which means the truthful reply to the first South Ham query — "have I wrecked it?" — usually no. To leave it that way, phone Petrol in Diesel and leave your motor alone. The rest of this page explains what petrol really does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you a second time.
What petrol in a diesel does to the motor
Passing through an engine, diesel is doing two jobs at once. Lubricating comes before burning; it does both. Very fine tolerances are built into your injectors and the high-pressure pump, and just the diesel running through keeps those surfaces from grinding together.
Petrol handles the first task badly and the second not at all. 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 away the lubrication your system hinges on, and any pump working on that mix is wearing itself.
Taken together, they show what shape the trouble has. The damage is done by circulation, not by contact. All a tank with petrol in it amounts to is a fuel issue. A pump that has been running on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the injectors further on.
South Ham, petrol in a diesel: four cases, from mild to significant
The best case there can be: filled up, never started. That petrol is inside that tank and just that tank, and the task is a drain and a flush where the vehicle stands. This is the one situation that can only truly happen on a forecourt, because anywhere else the vehicle has been driven to get there.
Started for a second, or just your ignition on. The system has been primed, so petrol has left your tank and got to your filter and your lines. That's usually still a simple job — a drain, a flush, and your filter dealt with.
A couple of miles driven, and your pump has spent every one of them working on diluted fuel. The work is that tank, the fuel lines, the fuel filter and fresh fuel through the whole system, and how hard the car was driven matters as much as how far. Short trips, such as the school run to St Anne's Catholic Primary School, are one matter. Driving as far as Winchester, under 25 miles away, makes a very different job — as does any distance on the M3, under 3 miles from South Ham, with the engine running hard the whole time.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone ragged. That's your engine telling you its fuel has stopped behaving like diesel. Whether it is the verge on St Patrick's Road, a lay-by or a side road, stop there and leave it. A car pulled over quickly very seldom has permanent damage, because the fuel drain and the flush, which still go first, take care of it.
South Ham people and that petrol in a diesel myths they hear
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing is removed by topping up — you're left with a bigger tank, still the same mix. A diesel fuel system does not tolerate petrol by percentage in the way that guidance presumes.
Myth: "A current diesel can cope with a bit of petrol." If anything, the reverse. A modern diesel sends its fuel through more precise components at higher pressure, which makes the lubrication count more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches people. Any petrol engine fed diesel generally won't run, and so the motorist stops and the damage stops with them. Whilst your pump wears, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. Fine and running are not the same at all.
Myth: a two-stroke additive lets you to drive home. It is an old fix, meant for another fault. What petrol has diluted remains weakened, and the petrol remains in that tank regardless.
The next start draws petrol back round the pump from the lines and the filter, where some of that sits after the motor has been run. That's why a DIY tank drain does not leave you sorted — a myth. Draining petrol into a can at the kerbside is also genuinely dangerous.
Why petrol in a diesel occurs so easily
It is rarely carelessness, and nobody does it on purpose. The petrol nozzle is the narrower of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol motor at all. The forecourt makes it simple, and the error runs one way.
When routine and the car stop matching, it takes place. Any car that is new to you — hired, on loan as a courtesy car, or brand new. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. A train to catch, and a hurried fill en route to Basingstoke. Years of petrol cars behind you, a diesel Volkswagen Passat in front of you at the forecourt for its first tank — that is when. Your hand does what it has always done once you add rain, a phone call or a back seat full of kids.
How to avoid petrol in a diesel at your next fill-up around South Ham
- A green handle for unleaded and black for diesel is usual in the UK — but not on each forecourt. Go by the label on the pump, not the colour.
- The first fill in a new car is the time to check the filler flap — inside it, or on the cap, plenty of vehicles state the fuel to use.
- Mark the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- It seems silly and it works: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Tuck your 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 have a filler designed to refuse a petrol nozzle, and add-on devices exist for vehicles without one. They are a safety net, not a reason to stop checking the pump.
- The moment you notice, stop: less petrol in that tank makes a weaker mixture. What to do next doesn't change, though — still don't crank it.
Already put petrol in a diesel around South Ham?
Then the order of things is short. Leave it unstarted, with your ignition switched off as well. The attendants at the forecourt — whether at Shell itself or wherever you filled up — will normally help push it clear of the pump if you ask. Then call 0333 366 0103 and tell us what was put in, roughly how much, and whether it has run.
Corrosion and deposits form the problem with AdBlue, where petrol brings lost lubrication. So if it was AdBlue, say so — and see its own South Ham page.
South Ham petrol in a diesel jobs: why one costs more than another
Four different jobs lie behind the four situations above — which is why there is no fair single quote. The scenario itself does most of the work of moving the cost. Where your car is matters too, and whether our van can safely reach it, after the ratio of petrol to what the tank holds.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and this is the reason. Given the replies, there is a straight figure rather than a range.
About South Ham
South Ham is a suburban area in Hampshire, situated inland at an elevation of 104 metres, approximately 15.9 miles from Winchester and 45.9 miles from London. South Ham is characterized by its predominantly terraced housing and is located near other residential areas such as Kings Furlong and West Ham. South Ham has a population of around 6064 residents, making it a moderately sized community within the region.
Fuel drain cover around South Ham and across Hampshire
South Ham rests in the RG postcode area, and the vans that answer petrol in diesel calls there work the locations near it as well — Kings Furlong, West Ham and Buckskin among them. The car does not need to move to us: our technicians drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
South Ham: still at the petrol pump?
Then you're in the best position there is. Turned off it stays; then phone.