Put Diesel in a Petrol Car?
While less damaging than petrol in diesel, it still stops you in your tracks. We'll drain the tank, flush the system and get you moving again quickly - anywhere in London, 24/7.
Call Now: 07393 440 255What Happens: Diesel in Petrol?
Diesel is heavier and oilier than petrol. It won't ignite properly in a petrol engine.
Because diesel nozzles are generally larger than petrol filler necks, this mistake is harder to make, but it still happens!
If you try to drive, the spark plugs will foul up, the engine will smoke heavily, misfire, and eventually cut out. While it's less likely to cause catastrophic damage compared to petrol-in-diesel, the fuel system still needs to be professionally drained and flushed.
Our Diesel in Petrol Solution
- Fast arrival anywhere in London (M25), Essex and Sussex
- Complete tank drain and system flush
- Spark plug cleaning (if necessary)
- Engine restart verification
- Compliant waste fuel disposal
- Friendly, professional service
Vehicle Types We Cover
Our technicians are trained to handle fuel drains on all types of petrol vehicles:
- Cars (All Makes & Models)
- Vans & Light Commercials
- Motorcycles & Scooters
- Hybrid Vehicles
Frequently Asked Questions
Common questions about putting diesel in a petrol engine.
Is diesel in a petrol car as bad as petrol in diesel?
Generally no. Diesel is heavier and less flammable, so it is less likely to cause metal-on-metal wear. It will, however, foul the spark plugs and clog the fuel system, so the tank still needs a professional drain and flush.
What are the symptoms of diesel in a petrol car?
The car may start but will produce heavy white smoke, misfire, lose power and eventually cut out altogether.
Can you fix diesel in a petrol car at the roadside?
Yes. We carry the equipment to drain the petrol tank and flush the lines on the spot, and we clean the spark plugs if the diesel has fouled them.
Do I need to change my fuel filter?
In most diesel-in-petrol cases a thorough flush is enough. Our technician assesses the vehicle and will advise if a filter change is needed for long-term reliability.