St Lawrence: Put Petrol in a Diesel Car?
If you have not turned on your engine as yet, don't. A drain and nothing else is almost always what a vehicle needs while the fuel is still sitting in the tank and your engine has not been started, which is why it is the next few minutes that matter, not how much was put in. Petrol in Diesel goes to your car wherever it has ended up in St Lawrence or the rest of Tyne and Wear, on the forecourt, at the roadside or on a private drive, and drains and cleans it there. Ring us and then we will tell you what happens after that before you try much else.
Petrol in a diesel: what to try now
- Whenever you drive, the pump and the fuel injectors suffer. This is why you do not fire it up, and why you don't rely on it once it has started. The catch about petrol in a diesel specifically — the point people get wrong — is that it drives away normally for the first mile or two. Diesel in a petrol motor typically will not run at all, which stops the person and stops the damage with them. This one lets you carry on.
- Two tasks, diesel: it ignites, and on the way through it keeps your injection pump and injectors oiled. Petrol only handles the one. That is why the car's ignition remains off also — turn it on and you often prime that system, and that's petrol leaving the tank for exactly those components.
- Don't water down it. Diesel poured on top gets rid of nothing, so all you have is more of what was already there, because percentage is not how a diesel fuel system tolerates petrol. Super unleaded? Simply petrol. The octane makes no difference.
- Sit tight if it is wise to. Hazards on, motor off, keep the car. Wherever you have stopped — the verge on Saint Lawrence Road, anywhere — an awkward location for us trumps a started diesel, and nothing is quicker for us to handle than a car that never moved.
- Our van showing up rather than circling turns on two things: a postcode that starts NE6 1, and whatever is closest to you with a label on it. Keep both ready before you call.
- Dial 0333 366 0103. Anticipate three points — what was put in, approximately how much, and whether your car has been started. The replies settle all that comes after.
The trip back would roughly double it, for no purpose at all. One commute has already sent a real load of petrol-thinned diesel through the high-pressure fuel pump of your Renault Megane. So leave the vehicle where it is. Ring us from the platform if that is simpler — nobody needs you standing over the vehicle at Manors while our technicians get on, and tonight beats finding out on Monday.
Tell us this much and our engineers can work with it: a diesel Volkswagen Tiguan, a couple of litres of unleaded in it, two miles or so, shut off outside Asda now. Time passed isn't the thing our engineers need. Fuel drawn by your pump is.
Pulled off the forecourt, read the till receipt, and left your diesel Mercedes A-Class up near Mushroom Works a few hundred yards later? That is about as well as this goes once the motor has turned. Ring us then leave the vehicle off. The short hop genuinely assists, but it was still a start and a drive, so thinned fuel has arrived at the fuel filter and your pump — which is why our technicians clean the lines rather than only emptying your tank.
Unfamiliar locations are where this occurs most, and the reason is mechanical not careless: the smaller petrol nozzle goes into a current diesel filler neck with practically no resistance at all. Fuelled up near Fish with Two Heads without thinking, in a diesel Citroen C3 you have had for two days? Call us where you are. Hire and courtesy cars tend to get driven further before anyone realises, and distance is what decides how much petrol reaches your injectors.
Repaired and starting are not the same thing, and the difference is the system: our technicians flush it, and take your filter off where there is a workable one. Compare that with the confident advice you will get — drain the car, refill with clean diesel. Half true. Do precisely that to a diesel Vauxhall Insignia near Admirality Pattern Anchor and it will start, which is exactly why the tip sounds plausible. Then the motor sucks the petrol left behind in your filter, and in the feed lines, straight back through the pump, because emptying a tank does nothing whatever about fuel that has already left it. Call us instead.
On a forecourt: clearing petrol from the diesel
Plenty of this work begins at a forecourt, which means a big part of that gets completed at one. Still at JET? Then that's generally where it takes place. Garage forecourts are everyday for us, with the permission of the site.
A filling station is the single location the mistake can be stopped before the engine has run. The few seconds between seeing your receipt and reaching for the key determine how much requires rinsing. Anywhere other than a forecourt — a car park, a private drive, a lay-by — the vehicle was switched on and driven to get there, so fuel was drawn from your tank, through the filter then into the high-pressure fuel pump. That means your lines and your filter need flushing as well as your tank. It's not a calamity, and we can still sort it out where your car is.
The attendants will usually offer to wheel the vehicle away from the petrol pump so the next customer can get through. That is worth doing. Cranking the car just for four vehicle lengths? No.
St Lawrence plus the places near it
These same journeys get us to St Peters, East Gateshead, Byker, Friars Goose and Felling Shore besides St Lawrence, which is a residential suburb.
We do come. Those names above are merely the immediate neighbours, and a page is there for the majority of places across Tyne and Wear, and so an absence from the list isn't an absence from the coverage. Phone to enquire rather than guessing, especially where you're on a boundary or somewhere the satnav struggles with.
Use the map for the area shown here. Our technicians work roadside, at forecourts, on driveways and at car parks across all of it, and the vehicle does not need to travel to us.
Roadside breakdowns across St Lawrence
The chance to stop anywhere sensible doesn't come to everybody. Set off, then realised? Finished up by the verge on Brinkburn Street South, or parked in some lay-by with your hazards on? That's a common call here. Not an unusual one.
Wait beside the vehicle when it is wise to sit inside, but out of it if it isn't. Every mile a diesel obliges you for on petrol pulls that mix further into your fuel system — and oblige it frequently will, which is why your motor does not get restarted to limp somewhere safer. Our van driving to a tricky place is no trouble for us, and it is much better for your car than carrying on.
Driven it already? Stop, and see this
Here is where your A167(M) matters, under 3 miles out of St Lawrence. It will frequently get you onto it, and some way along, before you notice a thing. Then it is some smoke, a lumpy idle and power falling away — not a neat stop. Wrongly fuelled diesels seldom give you one of those.
The first safe exit is the one to take. Switch off there, and leave the restarting alone. Long trip? Anything approaching the under 3 miles to the nearest city and you should assume the lot — filter, pump, injectors, all of it reached by the petrol. Say that on the phone, as it alters what goes in the van.
All about St Lawrence
St Lawrence is a suburban area located on the riverside in Tyne and Wear, with a low elevation of around 7 metres. St Lawrence sits close to the city of Newcastle upon Tyne, approximately 1.3 miles away, and is near other areas such as St Peters and Byker. St Lawrence is predominantly composed of flat housing and has a population of around 3511 residents. St Lawrence forms part of the wider urban landscape of Newcastle upon Tyne, in the North East region of England.
What happens when our engineers get to you in St Lawrence
- Three things get established before any quote — your fuel that went in, the amount, and whether anything has been run since. Each answer alters the work.
- Out comes the tainted mixture.
- What is left in the fuel system shouldn't be what started the problem, so the lines get cleaned and the filter cleared.
- We put new diesel in and bleed your system.
- Our engineers fire it up and check it runs properly on fresh diesel.
From that point, you're ready to pull away. All of this is done where your car is, so it never has to be taken to a garage, and when it has been spotted quickly, lasting damage is very uncommon.
AdBlue in a diesel tank in St Lawrence is a distinct job
The problem is not the same, though the opening rule is — don't crank it — if what was put in was AdBlue instead of petrol. Petrol dilutes the diesel and removes the lubrication the system depends on. AdBlue is urea dissolved in water, and in a diesel tank it brings corrosion and residue in its place.
Often the more significant of the two, AdBlue — and the detail lives on its own St Lawrence page. Both are ours to handle.
What a petrol-in-diesel drain will cost around St Lawrence
What moves the price is listed below, because this job isn't one job and we can't honestly put a single number on this page.
- Has it been run or driven? Nothing else counts for as much.
- The tank's capacity, set against how much of the wrong fuel went into it.
- AdBlue or unleaded, whichever went in.
- Where the vehicle is, and whether a van can safely get to and work on it.
Tell us what your car is, how much went in, and if the motor has run. A firm answer comes back, not a range. For the vehicle at home that's going nowhere and is not time-critical, works too.
St Lawrence drivers ask us these about petrol in diesel
Fuel drains on a St Lawrence petrol station forecourt
Yes, and it's where a fair portion of this work happens. Consent from the site is the condition. Given that, a forecourt like BP is somewhere we're often enough, along with the rest of them locally — so name yours on the phone and you'll hear whether working there is possible.
How much petrol is too much for a diesel?
It hinges on the ratio instead of the litres, and far more on whether your motor has run. Five litres into a nearly dry tank is not five into a full one, no. But both land on the same question in the end: has that blend been sucked right through, or has it not?
Petrol in my diesel, and I have driven the vehicle
Stop safely. Off. Nothing after that. It's recoverable far more regularly than people assume, even though driving is what takes the problem from your tank into the pump and injectors — and the single most useful thing you can do now isn't restart it.
Fuel drains and manufacturer warranties
No. Carried out properly, clearing and purging is no alteration at all, and the warranty from your manufacturer is untouched by it. An argument over a warranty is likelier to come from running a diesel on petrol — so leave it turned off.
Could I put some two-stroke in and just drive?
What petrol has weakened isn't restored by two-stroke oil, which is an old fix for a separate issue. So no. The pump still has to live with it, because the tank still has petrol in it later.
Does petrol in a diesel have to go to a main dealer?
Wherever the vehicle is, our technicians drain and clean it there, so a drive to the main dealer doesn't come into it.
Waiting next to it?
Don't switch your engine back on.
Driven it already? Then somewhere sensible, stop, turn off, and no restarting it later. Cold and parked, a vehicle is in the best place available — and drivers fear this a lot more than the recovery rate warrants.
At the kerbside, on the forecourt or at home — on-site fuel draining around St Lawrence and across Tyne and Wear.