Petrol in a Diesel Car in Bournbrook: How Worried Should You Be?
If it has not been started, worry less than you likely are. Everyone in Bournbrook begins with "have I ruined it?", and the fair answer is usually no: petrol left inside your tank of any diesel remains harmless until priming, cranking or driving pulls it into your fuel system. To keep the vehicle that way, call Petrol in Diesel then leave your engine alone. 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 never repeat it.
Petrol in a diesel: what does it do to your engine?
Two tasks fall to diesel on its journey round a motor. Before it combusts, it lubricates — then it ignites. What stops the surfaces inside the high-pressure pump and the injectors from wearing down against each other is the diesel flowing through them — they're built to very fine clearances.
The second task petrol does not do at all, and the first it does poorly. A pump working on a petrol mixture is wearing itself out, because petrol is thinner than diesel and takes away the protection your fuel system depends on. Petrol is also made to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that is where any knocking starts.
The shape of the problem is plain once you put those together. Contact does not do the damage — movement does. Petrol in a tank is a fuel issue. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the fuel injectors further on.
How serious is petrol in a diesel? Four situations our engineers see around Bournbrook
Filled up, not once started. The best case there can be. Being at a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With that petrol kept inside that tank alone, it is emptied and purged on the spot, and nothing more is needed.
Your ignition switched on, or a short start. With your system primed, the fuel lines and filter now hold petrol that came from your tank. Normally nothing more than emptying, purging and seeing to your filter, and so still easy.
Those few miles driven were the pump labouring on fuel thinned by petrol throughout. How hard the car was driven counts as much as how far, and the work takes in your tank, the fuel lines, the filter and fresh fuel through the entire circuit. Short trips, such as the school run to Tiverton Academy, are one matter. A run as far as Birmingham, under 3 miles away, is a very different task. So is any distance on the M5, under 5 miles from Bournbrook, where the motor has been running hard the whole time.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. The engine is telling you your fuel is no longer behaving like diesel. Leave it where it stops: a lay-by, a quiet street, the verge on Tiverton Road. What comes first is still the drain and flush-through, and that takes care of it, with permanent damage very unusual when a car is stopped soon.
Bournbrook motorists and the petrol in a diesel stories they hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed by topping up — you are left with a bigger tank, still the same mix. Percentage isn't how a diesel fuel system tolerates petrol, however much that advice supposes.
Myth: "A current diesel can cope with a bit of petrol." If anything, the opposite. Finer parts and higher pressure are how a modern diesel runs its fuel, and that makes the lubrication count more, not less.
"It starts, it drives, and so there is no harm" — the myth that trips up most drivers than any other. The motorist of a petrol motor fed diesel normally stops, because it will not run, and the harm stops there. Whilst your pump wears, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. Running doesn't mean fine.
An old fix for a different issue lies behind this one. Myth: "Add some two-stroke oil and drive it home." It does not put back what petrol has weakened, and the petrol is still in that tank later.
The next start draws petrol back round your pump out of the fuel lines and the fuel filter, where some of it sits after the engine has been run. That is why a DIY tank drain does not leave you sorted — a myth. Clearing petrol into a can at the kerbside is also truly risky.
Why petrol in a diesel happens at all
On purpose? Never. Through carelessness? Rarely, if ever. One way only, because of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol motor. That's how the forecourt makes it easy.
Habit and your car getting out of step is when it occurs. Hire cars, courtesy cars, and motors that are new to you. A household with one petrol and one diesel on the driveway. A well-known forecourt with the pumps in a different order. A train to catch, and a rushed fill en route to Selly Oak. A new-to-you diesel Renault Megane, its first fuelling, and a driver used to petrol: precisely when it occurs. Throw in rain, a phone call or a back seat full of kids, and the hand repeats what it has always done.
How to prevent petrol in a diesel on your next fill-up around Bournbrook
- A green handle for unleaded and black for diesel is normal in the UK — yet not on each forecourt. Trust the label on the petrol pump, not the colour.
- The first fill in a strange motor is the time to check your filler flap — on it, or on the cap, plenty of vehicles state which fuel to use.
- Good intentions do less than a sticker or a fob in a bright colour on your diesel's key if a household has one of each. So mark it.
- It sounds silly and it does the trick: on the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump.
- Mistakes like this are easy to make whilst your mind is on something else, so your phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler built to block a petrol nozzle, and add-on devices exist for vehicles without one. They are a backstop, not a reason to stop reading the pump.
- Less petrol makes a weaker blend, so stop the moment you notice — while remembering that the next step is unchanged. It's still not to crank it.
Petrol already in a diesel around Bournbrook? Begin here
Then the order of things is brief. Do not switch your ignition on, and do not fire it up. Ask the staff to help you push it clear of the pump if you are still on the forecourt, whether that's Esso or anywhere else. What went in, roughly how much, and if it has run: tell us those when you ring 0333 366 0103.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a separate issue — Bournbrook has a page all for it.
What makes one Bournbrook petrol in a diesel job cost more than the next
Four different tasks lie behind the four situations above — which is why there is no fair single quote. Mostly, the cost shifts with which situation you are in. Two things come after that: the petrol that went in as a proportion of what that tank holds, then the spot your car is in and whether our van can get to it safely.
That is why we ask three queries before costing rather than after: what got in, how much, and whether it's run. With the answers, there is a straight figure rather than a range.
About Bournbrook itself
Bournbrook is a suburban area in the West Midlands, situated near the River Rea and close to the neighbouring areas of Selly Park and Selly Oak. Bournbrook sits at an elevation of around 138 metres, approximately 2.9 miles southwest of Birmingham city centre. Bournbrook is characterized by its predominantly terraced housing stock, reflecting the area's historical development as a residential suburb of Birmingham. Bournbrook is also located near Ten Acres, another nearby suburban area.
Across West Midlands and in Bournbrook: fuel drain cover
Petrol in diesel call-outs in Bournbrook — part of the B postcode area — go to vans that likewise cover the spots round it, Selly Park, Selly Oak and Ten Acres among them. We drain wherever your vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
In Bournbrook and still at the petrol pump?
In that case, you couldn't be in a better place. Ring, and keep it turned off.