How Worried Should You Be? Petrol in a Diesel Car in Wolborough
Likely less than you are now — as long as nobody has started it. Until your ignition primes the pump, your starter cranks, or your car is driven, petrol in a diesel tank simply waits there and does no harm. Which makes the honest reply to the first Wolborough query — "have I wrecked it?" — normally no. Leave the motor off then call Petrol in Diesel — that keeps it that way. What petrol actually does to a diesel, how to gauge how far it's travelled, and how to stop it from happening a second time: that is the rest of this page.
Petrol in a diesel: what does it do to the engine?
Diesel has two jobs on its way through a motor. Lubricating comes before burning; it does both. Designed to very fine tolerances, your injectors and the pump rely on your diesel moving through them to stop their surfaces wearing against one another.
Badly at the first, not at all at the second: that is petrol. It is thinner than diesel and strips away the lubrication 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 reverse of what a diesel needs from its fuel. That's where the knocking comes from.
Put these together and the shape of the trouble is clear. Contact doesn't do the harm — movement does. Any tank with petrol in it is a fuel problem. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors further on.
Petrol in a diesel around Wolborough: how bad is it? Four situations
Fuelled, and not started: no case is better. Just that tank has petrol in it, and so the task is clearing that tank and rinsing the system where the car stands. This situation can only truly happen on a forecourt: anywhere else, the vehicle got there by being driven.
Started for a second, or only the ignition on. With your system primed, the lines and filter now hold petrol that came from your tank. Still normally simple: drain, flush, and your filter seen to.
A few miles driven, and the pump has spent every one of them labouring on thinned fuel. How hard the car was driven counts as much as how far, and this work covers that tank, your lines, your filter and fresh fuel through the entire circuit. Short trips, such as the school run to Wolborough Church of England Nursery and Primary School, are one thing. Very different a second time: a trip to Exeter, under 15 miles away, or some mileage on the M5, under 15 miles from Wolborough, where the engine kept working hard.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone lumpy. What you are hearing is your motor signalling fuel that no longer acts like diesel. Whether it is the verge on Coach Road, a lay-by or a side road, stop where you are and leave it. Long-term damage is very unusual if a car is pulled over quickly, and the drain and flush-through that still come first take care of it.
Myths Wolborough people hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — your tank just carries more of the same blend. Percentage is not how a diesel fuel system copes with petrol, whatever that advice assumes.
Not so: a modern diesel copes with a bit of petrol. If anything, the reverse. A current diesel sends its fuel through finer components at higher pressure, which makes the lubrication count more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there's no harm done." The motorist of a petrol motor fed diesel usually stops, because it will not run, and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump grinds. Being able to run isn't the same as being fine.
Myth: a two-stroke additive lets you to drive home. It was an old fix, meant for another issue. What petrol has thinned stays diluted, and that petrol remains inside your tank regardless.
If the engine has run, part of the petrol sits in the fuel filter and the fuel lines, not your tank — and the next start sends it right back through your pump. So the myth "drain the tank yourself and you are sorted" does not stand up. And, a can of petrol drained at the roadside is truly risky.
Why petrol in a diesel happens at all
No one does it on purpose, and it's seldom carelessness. The forecourt makes it simple: the petrol nozzle is the narrower of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol car at all. So the mistake runs one way.
The moment habit stops matching the vehicle is the moment it takes place. Any vehicle that is new to you — a hire car, on loan as a courtesy car, or just bought. Two motors on one driveway, one petrol, one diesel. A forecourt you know, only with its pumps arranged differently. Rushing for a train at Newton Abbot and fuelling up en route. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver used to petrol: precisely when it takes place. Throw in rain, a phone call or a back seat full of children, and the hand does what it has always done.
Wolborough people: how to avoid petrol in a diesel next time
- Check the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on every forecourt. The label is what counts.
- Inspect your filler flap. Many motors state the fuel type inside the flap or on the cap. Look at it on your first fill in any car you do not know.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of intending to remember, in a house with one of each.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It sounds silly. It works.
- Tuck the phone away. This is an easy mistake to make whilst you're thinking about something else.
- Some diesels come with a filler built to reject a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the petrol pump.
- Noticing it mid-fill? Stop there and then. A weaker mixture results from less petrol inside your tank, but your next step remains the same: do not start the car.
Put petrol in a diesel around Wolborough already?
Short and simple, then, is the order of things. Don't turn your ignition on, and do not start it. Ask the attendants to help you push it clear of the pump if you are still at the forecourt, whether that's Esso or somewhere else. What was put in, about how much, and if it's run: tell us those when you ring 0333 366 0103.
Corrosion and deposits are the trouble with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and see its own Wolborough page.
Wolborough petrol in a diesel jobs: why one costs more than another
There is no fair single price for this, since the four scenarios above are four separate tasks. The scenario itself does most of the work of moving your cost. The share counts next, meaning how much of the tank is petrol, followed by the position of your car and whether reaching it is safe for a van.
What was put in, how much, and if it has run — three questions our technicians ask before costing, not after, for precisely that reason. Their answers are what change a range into one firm number.
About Wolborough and where it is
Wolborough is a suburban area in Devon, situated inland at an elevation of 36 metres, and is located near the city of Exeter. Wolborough has a population of approximately 1871 residents and predominantly features detached housing. Wolborough is close to nearby places such as Newton Abbot and Knowles Hill, and is about 14 miles from Exeter. Wolborough is also about 165 miles from London, making it a relatively distant suburb from the capital city.
Wolborough and Devon: where our fuel drain cover runs
Wolborough rests in the TQ postcode area, and our teams that answer petrol in diesel calls there work the places around it as well — Newton Abbot, Knowles Hill and Penninn among them. The car does not need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Still at the pump around Wolborough?
Then, you couldn't be in a better place. Leave the vehicle switched off, then ring.