Grassendale Park: Petrol in a Diesel Car? How Worried to Be
Probably less than you are now — as long as no one has started it. Petrol sitting in a diesel tank does nothing to the engine until something pulls it through the system — your ignition priming the pump, your starter, or driving itself. So the honest answer to the first query anyone in Grassendale Park asks, "have I ruined it?", is usually no. Keep it that way: leave the motor off then ring Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel motor, the clues of how far it has got, and the way to make sure you never do it again.
Petrol in a diesel: what does it do to the motor?
On its way through an engine, diesel does two tasks. It lubricates first, and after that does it burn. The high-pressure fuel pump and the injectors are made to very fine gaps, and the diesel passing through them is what keeps those surfaces from wearing down against one another.
Of those two jobs, petrol manages the first badly and the second not at all. A pump working on a petrol mixture is wearing itself out, because petrol is thinner than diesel and strips out the protection your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that is where the clattering comes.
Combined, those leave the shape of the trouble clear. It's circulation that does the harm, not contact. All a tank with petrol in it amounts to is a fuel issue. Whatever a worn pump sheds travels on, borne by the fuel, into the fuel injectors further along, which is why a pump that has been working on that petrol is where a mechanical problem starts.
How bad is petrol in a diesel? Four scenarios our technicians see around Grassendale Park
The best case there is: filled up, never started. That petrol is in the tank and just that tank, and the task is a drain and a flush where the car sits. This is the one situation that can only truly take place on a forecourt, since anywhere else your car has been driven to get there.
A moment's running, or merely your ignition on. Once primed, your system has drawn petrol from that tank as far as the filter and your lines. Drain, flush, deal with the fuel filter: still normally easy.
Driven a couple of miles. Now the pump has spent these miles labouring on thinned fuel. The work is that tank, your lines, the filter and fresh fuel through the entire circuit, and how hard the car was driven matters as much as how far. Short trips, such as the school run to St Austin's Catholic Primary School, are one thing. Getting as far as Liverpool, under 5 miles away, makes a very different job — as does any distance on the M62, under 5 miles from Grassendale Park, with the engine labouring hard the whole time.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The engine is telling you the fuel is no longer acting like diesel. Pull up wherever you are — the verge on Grassendale Esplanade, a lay-by, a side street — then leave the car where it is. Lasting damage is very unusual when a car is stopped quickly, and the fuel drain and flush that still go first sort it out.
What Grassendale Park drivers get told about petrol in a diesel — and the stories in it
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 are left with a bigger tank, still the same mixture. Percentage is not how a diesel fuel system tolerates petrol, however much that guidance supposes.
Myth: "A newer diesel can cope with a bit of petrol." If anything, the opposite. A modern diesel sends its fuel through finer parts at higher pressure, which makes the lubrication count more, not less.
This is the one that catches people. Myth: "If it starts and drives, there is no damage done." Feed diesel to a petrol engine and it usually won't run, so the driver stops — and the damage stops with them. Feed petrol to a diesel and it usually starts, ticks over and pulls away as if nothing happened — all the while its pump wears. Fine and running are not the same at all.
Myth: "Add some two-stroke oil and drive the car home." It is an outdated workaround for a separate problem. None of what petrol weakened gets put back by it — and later, that tank still contains that petrol.
Myth: "Drain the tank yourself and you're sorted." After your engine has run, some of that petrol is no longer inside the tank: it is in the fuel filter and your lines, and it goes straight back through the pump on your next start. On top of that, petrol cleared into a can by the road is truly dangerous.
How it happens: petrol in a diesel
Nobody does it on purpose, and it's seldom carelessness. A diesel nozzle mostly will not fit a petrol vehicle, but the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error easy, and just in that direction.
When habit and the vehicle stop matching, it happens. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. A train to catch, and a rushed fill en route to Cressington. Years of petrol motors behind you, a diesel Volkswagen Passat in front of you at the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Preventing petrol in a diesel next time you fill up in Grassendale Park
- The label is what matters, so read the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on each forecourt.
- Many vehicles state the fuel inside the filler flap or on the cap, so check it on the first fill in a car you don't know.
- Label the key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- It sounds silly and it works: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump.
- Mistakes like this are simple to make whilst your mind is on something else, and so the phone goes away.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to refuse a petrol nozzle, and add-on devices are available for the remainder. Treat it as a backstop, then keep reading the pump.
- Stop the moment you realise. Less petrol in that tank means a thinner mixture. It does not change what to do next, which is still not to fire it up.
Already put petrol in a diesel around Grassendale Park?
Then the order of things is short. Leave it unstarted, with your ignition off as well. If you are still at the forecourt — BP or anywhere else — ask the attendants to help you roll the car away from the petrol pump. Then call 0333 366 0103 and tell us what got in, about how much, and if it has run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a separate issue — Grassendale Park has a page all for it.
Grassendale Park petrol in a diesel tasks: why one costs more than another
There is no honest single quote for this, since the four scenarios above are four separate tasks. Which of them you're in is chiefly what shifts the cost. Where the car is matters too, and whether a van can safely reach it, after the ratio of petrol to what that tank holds.
Ahead of any quote, not after, we ask three questions: your fuel that got in, the amount, and whether it has run. That's why. Given those answers, there is a straight figure rather than a range.
About Grassendale Park itself
Grassendale Park is a coastal suburban area in Merseyside, situated near the city of Liverpool. Grassendale Park sits at a low elevation of around 9 metres, close to the shores of the River Mersey. Grassendale Park is characterised by its predominantly flat-type housing and is located near other suburban areas such as Cressington Park and Aigburth.
Fuel drain cover around Grassendale Park and across Merseyside
The teams answering petrol in diesel calls in Grassendale Park, in the L postcode area, also work the locations near it, Cressington Park, Grassendale and Aigburth included. The car doesn't 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.
Still at the pump around Grassendale Park?
The best spot there is, then — that's where you are. Keep it off. Call.