A small amount of petrol in diesel: does it matter in Durham?- # A small amount of petrol in diesel: does it matter in Durham? By Rambo S, Wrong Fuel Expert at Fuel Fixer International · 4 October 2026 A small amount of petrol in diesel still matters on a modern engine. The risk comes from running it, not from the splash itself — so leave the key out. Call 01293 248666. ## What counts as a small amount People mean different things by it: a splash before they noticed, a couple of litres, the first click of the trigger. What they are really asking is whether they can get away with driving it. On a modern diesel the honest answer is that you are betting a pump on it. ## The cheaper bet A drain costs a known, fixed amount and takes about an hour. A high-pressure pump and a set of injectors is a workshop job measured in hundreds or thousands. The asymmetry is the whole argument for leaving it where it is and calling, even when the amount really was small. ## If you have already driven off Pull in somewhere safe and switch off as soon as you notice knocking, smoke or a loss of power. Tell us how far you went. Most short distances around Durham are still recoverable with a drain and a new filter. ## Around Durham Durham calls split between motorway traffic at Durham Services and Belmont, a university population that turns over every September, and the former coalfield towns where distances to a main dealer are long. A pronounced overnight share from the A1(M), a September spike from the university, and a steady weekday pattern on the A690 and A167. That applies across the villages we cover, including Langley Park, Esh, Quebec, Cornsay, Lanchester, Kimblesworth, Plawsworth, Nettlesworth, Pelton, Grange Villa, Chester Moor and Great Lumley. Do not start it — that is the whole thing Everything else on this list is detail. This one line is the difference between a call-out and a pump. - Leave the vehicle where it stopped Pushing or coasting is still movement, and movement is how contaminated fuel finds the pickup. - Sort out safety Hazards, and get people out of the vehicle if you are anywhere near moving traffic. - Call 01293 248666 Answered around the clock. Tell us what went in and whether it ran; you get the full price before a technician sets off. - The job itself Extract, flush, refill, prime, run up, check. Roughly an hour on a standard vehicle. - Old fuel away, invoice done Controlled waste, transfer note, registered carrier. Keep the note — it is what protects you. ## What actually happens inside the fuel system Fuel leaves the tank through the lift pump, passes the filter, reaches the high-pressure pump and then the injectors. Petrol in a diesel system strips the lubrication that high-pressure pump depends on, and metal shed by the pump travels downstream into the injectors. That sequence is the whole story: cost depends on whether the engine ran, and for how long, not on how many litres went in. Durham sits at the centre of a wide rural catchment. Once you are out towards Consett, Crook or the coast, the nearest dealer is a long way off and a mobile drain is comfortably the faster option. ## The cost, honestly There is one fixed figure and one variable. The fixed figure is the call-out; the variable is whether the engine ran, and for how long. **Call-out**: From just £89 misfuel callout fee **Engine never started**: Usually the drain and flush only **Engine run briefly**: Drain, flush, often a new fuel filter **Driven some distance**: May need the high-pressure pump or injectors checking — a workshop job **When you hear the price**: On the phone, before anyone travels ## Questions we get asked **Can you come to a supermarket forecourt?** Yes, and it is where a good proportion of jobs happen. Tell the cashier a drainer is on the way; they are used to it. **What about a van or a hire car?** Same job. With a hire car, ring the hire company too — some policies cover a misfuel drain and it is worth knowing before you pay. **Is there an out-of-hours surcharge?** The call-out is the call-out. Whatever the total is, you hear it on the phone before anyone travels. **How much does it cost in Durham?** From just £89 misfuel callout fee. The full price for your vehicle is confirmed on the phone before a technician sets off, so there is no surprise when we arrive. **Will it have done damage?** If the engine was never started, damage is unlikely. If it ran, the risk rises with the distance driven — which is exactly why we ask. ## Rated 4.8 out of 5 From 2,190 Trustpilot reviews. Reviewers consistently pick out arrival times and the fact that technicians talk them through what happened rather than just taking the keys. Where reviews are critical, it is almost always about price. Rather than ignore that: the call-out is From just £89 misfuel callout fee, quoted in full on the phone before travel, and we would rather lose the job on the call than argue about it on the forecourt. ## More local guides - How to dispose of old petrol in Durham, legally - Does insurance cover a misfuel? A Durham guide - Gilesgate misfuel guide: roads, villages and real costs - The Belmont misfuel guide: first hour to back on the road - Brandon misfuel guide: roads, villages and real costs - The Sherburn misfuel guide: first hour to back on the road ## More on wrong fuel in Durham For coverage by postcode district, see the postcode index; for the roads we cover, the road guides; and for every town and village by name, the area index. ## Who you are dealing with Wrong Fuel Durham is a service by Forecourt Assist. Forecourt Assist is a trading name of Fuel Fixer Ltd, company no 08520551, a company of Fuel Fixer International. Registered at Fairway House, Portland Road, East Grinstead, RH19 4ET. Fuel Fixer International is owned by Stockbridge Capital Holdings. ## Across the Fuel Fixer network Wrong Fuel Durham is one of the brands operated by Forecourt Assist. The full directory is on the operator site. - Wrong Fuel Maryport — Maryport and the Solway coast - Wrong Fuel Darlington — Darlington and the A1(M) - Motor Servicing — mobile car servicing - Wrong Fuel Maryport — Maryport and the Solway coast - Forecourt Assist — the complete network directory - Fuel Fixer International — the operating group - Stockbridge Capital Holdings — group owner Background reading: GOV.UK guidance on fuel.