Should You Worry? Petrol in a Diesel Car in Wellswood
Probably less than you are now — as long as nobody has started the vehicle. Until the ignition primes your pump, the starter turns, or the vehicle is driven, petrol in a diesel tank simply rests there and does nothing. Which makes the honest reply to the first Wellswood question — "have I wrecked it?" — normally no. To keep it that way, call Petrol in Diesel then leave the engine switched off. Further down, this page sets out what petrol really does inside a diesel, how far it might have got, and how to stop it happening to you again.
Petrol in a diesel: what does it do to your engine?
Two tasks fall to diesel on its journey round a motor. Before it ignites, it lubricates — then it ignites. Very fine clearances are built into the injectors and your high-pressure pump, and only the diesel running through keeps those surfaces from grinding together.
Of these two jobs, petrol handles the first badly and the second never. The knocking comes from petrol being made not to ignite when compressed, which is precisely the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication the fuel system depends on, and any pump working on such a blend is wearing itself.
The shape of the trouble is plain once you put those together. It's movement that does the harm, not contact. Where the petrol is only in your tank, it is a problem of fuel, nothing more. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the injectors downstream.
How bad is petrol in a diesel? Four situations our technicians see around Wellswood
Fuelled up, never started. The best case there can be. Being at a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With the petrol kept in that tank alone, it's emptied and rinsed right where it stands, and nothing more is needed.
A moment's running, or merely the ignition on. The system has been bled, and so petrol has left your tank and reached the fuel filter and the lines. Drain, flush, deal with your filter: still normally straightforward.
Driven a few miles. Now the pump has spent these miles running on weakened fuel. Distance is only half of it; how hard it was driven matters just as much. Either way the work includes your tank, the fuel lines, your filter and clean fuel through the entire circuit. Driving the kids to Ilsham Church of England Academy is one sort of trip. Very different once more: a trip to Exeter, under 25 miles away, or some miles on the M5, under 15 miles from Wellswood, where the motor kept running hard.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone uneven. What you are hearing is the engine reporting fuel that no longer acts like diesel. Pull up wherever you are — the verge on Higher Erith Road, a lay-by, a side street — then leave it there. The fuel drain and flush-through still come first, and they take care of it: when a vehicle is pulled over soon, lasting damage is very unusual.
Petrol in a diesel stories Wellswood drivers hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing is removed when you top up — the tank just carries more of the same mixture. Percentage is not how a diesel fuel system tolerates petrol, whatever that advice assumes.
"Current diesels can handle a little petrol" — a myth, and nearer the opposite. At higher pressure, through finer parts: that's how a modern diesel handles its fuel, so the lubrication matters for more, not less.
"It starts, it drives, and so there is no harm" — the myth that catches more motorists than any other. Feed diesel to a petrol motor and it generally won't run, so the driver stops — and the harm stops with them. Feed petrol to a diesel and it usually starts, ticks over and drives away as if nothing has happened — all the while its pump wears. Being able to run is not the same as being fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate problem. It does not put back what petrol has diluted, and that petrol is still in your tank later.
Once your engine has run, part of the petrol is in the filter and the lines, not the tank — and the next start sends it right back through the pump. So the myth "drain that tank yourself and you are sorted" does not hold. Also, a can of petrol drained by the roadside is genuinely hazardous.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Rarely, if ever. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol motor at all. The forecourt makes it easy, and the mistake runs one way.
Habit and the vehicle getting out of step is when it takes place. Courtesy car, hire car, or a vehicle that is brand new. A household with one petrol and one diesel on the drive. A familiar forecourt with the pumps in a different order. Rushing for a train at Torquay and fuelling up en route. A new-to-you diesel Renault Clio, its first fuelling, and a motorist accustomed to petrol: precisely when it occurs. Your hand does what it has always done once you add rain, a phone call or a back seat full of children.
Next time you fill up around Wellswood: avoiding petrol in a diesel
- Green for unleaded and black for diesel is usual in the UK — yet not on each forecourt. Trust the label on the petrol pump, not the colour.
- The first fill in a strange motor is the time to check the filler flap — on it, or on the cap, plenty of motors state which fuel they take.
- Good intentions count for 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.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. It seems silly and it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away and keep your mind on the petrol pump.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to block a petrol nozzle, and add-on devices exist for the remainder. Treat it as a backstop, and keep checking the pump.
- Stop as soon as you notice. Less petrol inside the tank makes a weaker mix. It doesn't change what to do next, which is still not to fire it up.
Wellswood: already put petrol in a diesel?
Then the order of things is brief. Don't turn the ignition on, and don't start it. If you are still on the forecourt — Harvest Energy or anywhere else — ask the staff to help you push the car clear of the petrol pump. What went in, roughly how much, and if it has run: tell us that when you call 0333 366 0103.
Say so if it was AdBlue rather than petrol: it is a different problem, with its own page for Wellswood, because AdBlue brings corrosion and deposits rather than lost protection.
Wellswood petrol in a diesel tasks: why one costs more than another
A fair single quote doesn't exist here: four situations, four separate jobs. The scenario itself does most of the work of moving your cost. Two things follow that: the petrol that went in as a share of what the tank holds, then the place the vehicle is in and whether a technician can reach it safely.
Three questions come first, before any quote, instead of after — what got in, how much, has it run — and that is the reason. A range turns into a straight figure when the replies are in.
About Wellswood, for a moment
Wellswood is a coastal suburban area in Devon, situated near the popular seaside resorts of Torquay and Babbacombe. Wellswood sits at an elevation of 73 metres, overlooking the English Channel, and is located approximately 17 miles from Exeter. Wellswood is characterized by its predominantly flat-type housing, which is common in many coastal areas of the South West. Wellswood forms part of the larger Torquay urban area, which includes nearby neighbourhoods such as Ellacombe.
Across Devon and around Wellswood: fuel drain cover
Ellacombe, Babbacombe and Torquay are among the locations around Wellswood that the same teams work, answering petrol in diesel calls across Wellswood's TQ postcode area. A forecourt, a supermarket car park, a lay-by or your own drive are all places our technicians drain, and your car doesn't need to move to us.
Still at the pump around Wellswood?
The best spot there is, then — that's where you are. Keep it off. Call.