Should You Worry? Petrol in a Diesel Car in Giggetty
Not started? Then less anxious than you likely are. Until the ignition primes your pump, your starter turns, or your vehicle is driven, petrol in a diesel tank just rests there and does nothing. Which makes the truthful reply to that first Giggetty question — "have I wrecked it?" — usually no. Leave your engine off and call Petrol in Diesel — that keeps it like that. Read on for three things: the effect petrol has inside a diesel engine, the signs of how far it has spread, and the way to make sure you don't do it again.
Your engine and petrol in a diesel: what goes on
Passing through a motor, diesel does two jobs at once. It protects first, and only then does it burn. Very fine gaps are built into the injectors and the high-pressure fuel pump, and just the diesel running through keeps their surfaces from grinding together.
The second task petrol doesn't do at all, and the first it does poorly. Being less viscous than diesel, petrol strips out the protection a fuel system needs, so a pump on the mixture to wear itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the rattling.
Taken together, they make clear what shape the issue has. Contact does not do the harm — circulation does. All a tank with petrol in it amounts to is a fuel issue. Whatever a worn pump sheds goes on, carried by your fuel, into the fuel injectors further along, which is why a pump that has worked on the petrol is where a mechanical issue starts.
Giggetty, petrol in a diesel: four situations, from mild to major
Fuelled up, never started. The best case there is. Just your tank has petrol in it, and so the job is draining your tank and cleaning your system where the car sits. This scenario can only truly take place at a forecourt: anywhere else, your car got there by being driven.
Started for a moment, or only your ignition on. Petrol has left your tank and got to the filter and the lines, because the fuel system has been bled. Drain, flush, see to your filter: still usually straightforward.
Those few miles driven were the pump working on fuel thinned by petrol the whole way. How hard the car was driven matters as much as how far, and this work takes in the tank, the lines, the fuel filter and clean fuel through the whole circuit. Driving the children to St Bernadette's Catholic Primary School is one sort of trip. Any miles on the M54, under 10 miles from Giggetty, means the motor has worked hard throughout, and a run to Wolverhampton, under 5 miles away, is a very different job as well.
Driven on until it complained — clattering, smoke, a lumpy idle, a dead throttle. That is your engine telling you its fuel has stopped behaving like diesel. Pull up where you are — on the verge on Giggetty Lane, at the kerb, down a side road — and do not move it again. The fuel drain and flush-through still go first, and they sort it out: if a vehicle is stopped quickly, lasting damage is very unusual.
What Giggetty motorists get told about petrol in a diesel — and the stories in it
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. A fuller tank of the same mix is all it gives, since topping up takes out nothing. That advice supposes a diesel fuel system tolerates petrol by percentage. It does not.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." A current diesel runs its fuel through more precise parts at higher pressure, which makes the protection matter more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. Any petrol motor fed diesel normally won't run, and so the motorist stops and the harm stops with them. A diesel fed petrol usually starts, ticks over and drives away as though nothing has happened, whilst your pump grinds. Being able to run isn't proof of being fine.
An outdated workaround for a distinct fault is behind this one. Myth: "Add some two-stroke oil and drive the car home." What petrol has diluted stays weakened, and that petrol remains inside the tank anyway.
If your engine has run, part of the petrol sits in the fuel filter and your lines, not the tank — and your next start pulls it straight back through your pump. So the myth "drain the tank yourself and you are sorted" does not hold. Draining petrol into a can at the kerbside is also genuinely risky.
Petrol in a diesel: how does it take place?
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it easy: the petrol nozzle is the smaller of the two, and it slides into a diesel filler with almost no resistance, while a diesel nozzle generally will not go into a petrol car at all. So the mistake runs one way.
Routine and your car getting out of step is when it takes place. Any vehicle that is new to you — hired, on loan as a courtesy car, or brand new. Two cars on one drive, one petrol, one diesel. A well-known forecourt with the pumps in a different order. A train to catch, and a rushed fill on the way to Coseley. Precisely the moment it occurs: after years of driving petrol, someone fills a diesel Renault Clio for the first time. Add a back seat full of children, a phone call or rain, and the hand wins.
Next time you fill up around Giggetty: preventing petrol in a diesel
- Read the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on every forecourt. The label is what counts.
- Many cars state the fuel type inside your filler flap or on the cap, so check there on your first fill in any car you do not know.
- One of each in the household? Label your key to the diesel — a bright fob, a sticker — because meaning to remember is not enough.
- It seems daft and it works: on your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump.
- While you are thinking about something else, this is an easy mistake to make — so put the phone away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to reject a petrol nozzle, and add-on devices exist for vehicles without one. They are a safety net, not a reason to stop checking the petrol pump.
- Stop as soon as you notice. Less petrol in your tank means a thinner blend. It doesn't change what to do next, which is still not to fire it up.
Giggetty: already put petrol in a diesel?
Then the order of things is brief. Never start the vehicle, and don't switch your ignition on. If you're still at the forecourt — Texaco or anywhere else — ask the attendants to help you roll the vehicle away from the pump. Then call 0333 366 0103 and tell us what got in, roughly how much, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a separate issue — Giggetty has a page just for it.
One petrol in a diesel job in Giggetty costs more than another. Why?
The four situations above are four separate jobs, so no single quote for this would be fair. Mostly, the cost moves with which situation you're in. Beyond that it is the proportion — how much petrol got in against how much the tank takes — and then where your car is and whether a technician can reach it safely.
That's why our engineers ask three queries before pricing instead of after: what was put in, how much, and if it's run. Their answers are what change a range into one firm number.
About Giggetty
Giggetty is a suburban area in Staffordshire, situated on the riverside at an elevation of 81 metres, with Wolverhampton approximately 5 miles to the north. Giggetty lies within the West Midlands region, about 113 miles northwest of London, and is near other local places such as Wombourne and Blakeley. Giggetty has a population of around 6088 people, predominantly living in semi-detached housing. Giggetty is also close to Brickbridge, reflecting its position within a network of local communities.
Fuel drain cover in Giggetty and across Staffordshire
The teams answering petrol in diesel jobs around Giggetty, in the WV postcode area, also work the locations near it, Wombourne, Blakeley and Brickbridge among them. Our engineers drain where the car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Still at the pump in Giggetty?
Nothing beats it: that's where you are. Keep it off. Phone.