Whitletts: Put Petrol in a Diesel Car?
With the tank still holding the petrol and your engine not yet started, almost every job requires only a drain, so leave your engine off. That outcome is determined in the minutes straight after filling up, rather than by the amount that got in. Throughout Whitletts and the rest of South Ayrshire, Petrol in Diesel drains your car and cleans it where it stands, whether at a roadside, on a drive or at a forecourt. We can explain what the next move will be. Contact us — it goes before anything else.
What now? Petrol in a diesel, in order
- Feed a petrol engine diesel and it will usually refuse to run at all, so the driver stops there and so does the wear. Feed a diesel petrol and the engine starts, it ticks over, it pulls away — fine for several miles. Drivers have that reversed, which is the thing they get wrong about petrol in a diesel especially. So don't crank it. And having started, do not trust it: the fuel system is wearing as you drive.
- Leave the car's ignition alone too. Diesel does two roles: it combusts, and before it ignites it greases that high-pressure pump and those injectors. Petrol does the first but not the second. Turning the car's ignition on is usually all it takes to prime that system, which pulls that petrol out of your tank then into exactly those parts.
- Don't pour diesel on top to water down it. A diesel fuel system will not accept petrol by percentage in the way that advice assumes, and topping up removes nothing — it merely gives you a fuller tank of the same blend. The octane makes no difference either: super unleaded is just petrol.
- Sit tight if it is safe to. Hazards on, engine off, keep the vehicle. Wherever you have stopped — the verge on Glenmuir Road, anywhere — a tricky spot for us beats a started motor, and nothing is easier for us to sort than a motor that never moved.
- The van turning up instead of circling turns on two things: a postcode beginning KA8 9, and whatever is closest to you with a label on it. Have both prepared before you ring.
- Dial 0333 366 0103. Expect three queries — what was put in, approximately how much, plus whether your car has been turned over. Those replies determine whatever comes after.
Tonight, please, instead of Monday. Driving it home is the only thing not to do: a commute has sent real quantity through the pump already, petrol-thinned diesel and plenty of it, and the return leg would more or less double the figure to no gain. The Volkswagen Tiguan can wait at Newton-On-Ayr perfectly safely. Call from the platform if handier; standing over us whilst we work isn't needed.
Car parks like the one at Spar are a place our technicians visit regularly, and the fuel is seldom the awkward part. That bay is: vehicles either side, a trolley shelter behind, sometimes a height limit on the way in that determines if a technician can get to you at all. So tell us how penned in you are when you phone, and which way the car is pointing. If our engineers can't work next to the diesel BMW 3 Series we will move it without running it — and that isn't pedantry about a few seconds of running. Any start primes the fuel system and sucks more of the mixture out of that tank and on to the pump, so a car shuffled twice into a nicer bay has gradually become a worse job than one left just where it stopped.
How far, and how hard? The second of those matters more than the first, so have both ready. Your Peugeot 308 will have seemed completely usual on the way back from the local primary school — they all do, and that's the catch. Diesel into a petrol motor usually won't run at all: the person stops, and so does the harm. Petrol into a diesel starts, idles, pulls away like nothing happened, whilst the high-pressure fuel pump gets on with its work minus the lubrication your fuel should be giving it. No warning appears, as behind the wheel nothing looks wrong.
Straightforward job, this one — till someone drives it home. A diesel Audi A4 left by Thistle Inn with petrol in your tank loses nothing by sitting there overnight, so park the car then phone once it is light. Expect a question about that trip there, though. Brief and chilly is exactly where petrol struggles to burn, and what will not burn can get past the rings then into the oil.
That sluggishness is your fuel failing to build pressure correctly, not the motor failing — and with no warning for it, vehicles in that position typically get driven once more before anyone rings. Please don't. A few streets is all it got: throttle gone dead, idle turned uneven, and a diesel Citroen C3 now waiting by St.Quivox Parish Church. Turn it off then phone us.
Forecourt drains for petrol in a diesel
Pumps are where this job mostly kicks off, and where a good share of that closes. We work on petrol station forecourts all the time, with the site's permission, so if you are still at Asda that's generally where the drain happens.
Before your motor has started — a forecourt is the one spot this ends up spotted. Fuel drawn out of your tank and through your filter, all the way to your high-pressure pump, is what happens when the engine is started and the vehicle is driven to where it is now: the car park, the private drive or the lay-by, anywhere other than the forecourt. So the flush covers the filter and your lines as well as the tank. That is still not a disaster, and our engineers put it right where your car stands. What decides it is whether the ignition was turned in the seconds after the receipt was read.
Wheel it out of the way if the staff offer, and they generally will. The next customer gets through the pump, and that is worth doing. Starting the car just for four vehicle lengths? No.
Places our vans reach around Whitletts
Being a residential suburb, Whitletts sees a steady call, whilst its neighbours round about go with it on that same trip: Dalmilling and Braehead, Heathfield and Lochside, Craigie.
We still come. Those names above are only the immediate neighbours, and a page exists for the majority of places in South Ayrshire, and so an absence from the list isn't an absence from our coverage. On the boundary, or anywhere the satnav misreads? Phone to check rather than presuming.
Look at our map for the ground covered on this page. Roadside, forecourt, drive, car park: the lot is territory our engineers work on, and none of that requires your car to move to us.
Whitletts: stuck where you parked
Not everyone gets the chance to stop somewhere safe. A normal call for us and not an odd one: worked out after setting off, finished up by the verge on James Brown Avenue or at a lay-by with the hazard lights flashing.
Fine where you are? Stay with it. Not fine? Get out and clear of it. It will frequently oblige. A diesel running on petrol limps along very willingly, and that's the problem: restart it to get to somewhere safer and that blend goes further into the fuel system with every mile covered. A van driving to a tricky location is no problem for us, and it is a lot better for your car than pressing on.
Driven it already? Pull in, and check this
under 15 miles from Whitletts, the M77 is what matters here. A misfilled diesel will frequently take you onto it and some distance along before anything feels wrong, while the signs when they arrive are generally a loss of power, a lumpy idle and smoke rather than a neat stop.
Take the first exit that's sensible, pull up there, and never start it to move it. It affects what we bring, and so say so when you phone: on a longer drive — anything near the under 50 miles to the closest city — take it the contamination has been through the filter, your pump and the injectors.
A little about Whitletts
Whitletts is a coastal suburban area in South Ayrshire, situated near the towns of Dalmilling and Braehead. Whitletts lies at an elevation of around 20 metres, with semi-detached housing being the predominant type of accommodation. Whitletts is located approximately 30 miles from Glasgow, making it a commuter base for the city. Whitletts has a population of around 5374 people, with nearby Heathfield also being a part of the wider community.
What follows when we get to you around Whitletts
- We establish what got in, how much, and if the engine has run. The replies shape the work, which is why our engineers ask before giving a price.
- The polluted mixture is pulled from the tank.
- Fuel lines are purged through and the filter cleaned, leaving nothing in the system that caused any of this.
- Fresh diesel goes in, and then the system gets primed.
- The engine is started and checked to make sure it runs correctly on clean diesel.
From there, you are ready to set off. We do all of it wherever the vehicle has ended up, which means it never needs to be taken to a workshop, and if it has been spotted early, it's very uncommon for there to be permanent damage.
AdBlue in a diesel tank in Whitletts is a distinct matter
The fault is not the same, though the opening instruction is — never crank it — if what was put in was AdBlue instead of petrol. Thinned diesel, and no lubrication left for the fuel system that relies on it. That is petrol. Urea in water, AdBlue, and in a diesel tank that brings corrosion and build-up.
Frequently the more significant of the two, AdBlue — and the detail sits on its own Whitletts page. Both are ours to deal with.
Whitletts prices for a petrol-in-diesel drain
Truthfully, no single figure fits on a page like this. The job changes. Here's what moves it:
- Started? Driven? Either answer counts more than anything else on this list.
- Wrong fuel in, against what the tank holds — that proportion.
- Which got in: unleaded or AdBlue.
- Access: the vehicle's position, and whether working on it there is safe for a van.
The car, the quantity, whether it has run — give us those and the answer comes back firm rather than as a range. Motor at home, going nowhere, nothing pressing about it — is fine for that.
Petrol in diesel questions from Whitletts motorists
At a petrol station in Whitletts, can you do a fuel drain there?
Yes, and it is where a big share of this work happens. Our engineers attend Tesco and the other forecourts locally routinely, with the station's consent — tell us which one you are at when you phone and we'll tell you if our engineers can work there.
A couple of litres of petrol in a diesel — too much?
It hinges on the proportion rather than the litres, and much more on whether the engine has run. Five litres into an almost dry tank isn't five into a full one, no. But both land on the same query in the end: has that mixture been sucked right through, or has it not?
I drove the vehicle after putting petrol in my diesel. What now?
Stop somewhere safe, switch off, and leave it off. Driving is what shifts the trouble from that tank into your pump and injectors — but it's fixable much more often than people assume, and the single most helpful thing you can do now isn't restart it.
Fuel drains and manufacturer warranties
It isn't a modification, and so a drain then flush carried out correctly does not void a manufacturer's warranty. Another good reason to leave it switched off: running a diesel on petrol is the thing likelier to cause a dispute with one.
Could I put some two-stroke in and just drive?
No. It belongs to a different issue from a separate era, and petrol has thinned something no oil of that kind restores. Afterwards? Still petrol in your tank, and a pump that has to cope with the stuff.
A main dealer for petrol in a diesel — essential?
Not at all. We drain and flush the vehicle wherever it is, so there's no need to take it to a dealership.
You, and the vehicle, still together?
Switched off is how the car remains.
If you have already driven it, pull over somewhere safe, turn it off and keep it off. A still, cold car is the best place to be in, and this is recoverable from far more commonly than motorists assume.
Across South Ayrshire and in Whitletts: on-site fuel draining, at home or on the forecourt or at the roadside.