What happens if you put a small amount of … unleaded car- # What happens if you put a small amount of diesel in an unleaded car What happens if you put a small amount of diesel in an unleaded car? A splash still matters in a modern diesel. Do not start it and do not top it up hoping to dilute it — call first. Call 01293 248666 — a mobile technician comes to the vehicle anywhere across CA1 to CA6. Call-out £89 to £199, drain £199 to £1,999. ## No premises, no recovery truck The alternative to what we do is a recovery truck, a garage queue and a courtesy car you did not want. Wrong Fuel Carlisle sends a technician to CA1 to CA6 instead, and the job is normally finished where you are standing. Call 01293 248666. There is no Carlisle branch to drive to, which is rather the point. **Search**: what happens if you put a small amount of diesel in an unleaded car **What it is**: Small amount of petrol in diesel **Where we cover**: CA1 to CA6 **Cost**: Call-out £89 to £199, drain £199 to £1,999, quoted in full before we travel **Time on site**: About an hour **Hours**: 24 hours, every day **Phone**: 01293 248666 ## What happens if you put a small amount of diesel in an unleaded car: what to do Five litres, twenty litres, a splash — why the amount matters less than the key. ## Why we ask about the engine before anything else It is not small talk. Whether the engine ran tells us which parts the wrong fuel has touched, and therefore what the technician needs to bring and what the job is likely to involve. A vehicle that never started needs a drain. One that ran needs a drain and a careful look further along the fuel path. ## Step by step Leave the key alone This is the one that decides the price. Wrong fuel sitting in a tank is a drain; wrong fuel that has been through the engine is a different job. - Do not push or coast it Moving the vehicle can slosh contaminated fuel toward the pickup. Leave it where it is unless staying there is unsafe. - Make yourself safe Hazards on. On a forecourt, tell the cashier — they will almost always let you stay put once they know a drainer is coming. - Call 01293 248666 Tell us the vehicle, which fuel went in, roughly how much, and whether the engine ran. You get a full price before anyone sets off. - We drain, flush and prime Tank emptied, lines flushed, fresh fuel in, system bled and run up before we go. - You drive away Most jobs finish on site in about an hour. The old fuel leaves with us under a waste transfer note. ## The full page for this - Small amount of petrol in diesel in Carlisle ## Related searches - I put 5 litres of petrol in my diesel car - 20 litres of petrol in diesel car - Small amount of petrol in diesel car - Small amount of diesel in petrol car - 10 litres of petrol in diesel car - Small amount of petrol in diesel engine - 15 litres of petrol in diesel car - 5 litres of diesel in a petrol car ## Before you trust us, check Trustpilot 2,190 verified reviews, 4.8 average. Customers repeatedly credit swift attendance and clear explanations of what went wrong inside the engine. Some customers object to cost, and they are entitled to. Our ranges are public — £89 to £199 call-out, £199 to £1,999 drain — and nobody sets off until you have heard yours. ## Questions we get asked **How long will I be waiting?** Arrival depends where you are across CA1 to CA6 and what is already running. You get a realistic window on the call rather than an optimistic one. **Can I just top it up with the right fuel?** No. Dilution does not fix contamination, and driving to a filling station to try it is the mile that turns a drain into a repair. **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. **Do I need to stay with the vehicle?** Usually yes, so we can hand it back to you running. If you cannot stay, say so on the call and we will work out how to do it. ## Who you are dealing with Wrong Fuel Carlisle is a service by Forecourt Assistance. Forecourt Assistance 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 network Wrong Fuel Carlisle is one of the sites run by Forecourt Assistance, a trading name of Fuel Fixer Ltd, part of Fuel Fixer International, owned by Stockbridge Capital Holdings. Every site below belongs to the same company. - Forecourt Assistance — the operator: network directory and author page - AdBlue in Fuel — AdBlue contamination drains only - Misfuel Doctor — misfuel help, organised by fuel mix-up - Wrong Fuel — the evidence base; home of every statistic - Fuel Fixer Scotland — wrong fuel across Scotland, plus Ireland - Fuel Fixer — the group operating site - Misfuel Servicing — wrong fuel and misfuelling help, call-only Background reading: Waste carrier registration — GOV.UK. Last updated 3 November 2026 · Reviewed by Rambo S, Wrong Fuel Expert