Wrong Fuel FAQs: Expert Answers & Dangerous Myths Debunked
Separating Internet Rumours from Mechanical Reality
When you misfuel a vehicle, it’s easy to panic and search online forums for quick fixes. Unfortunately, the internet is packed with outdated, dangerous advice regarding wrong fuel remedies.
Running an engine on contaminated fuel based on a forum post can cause instant, permanent damage to modern high-pressure fuel pumps and catalytic systems. Below, our senior mechanical technicians address the exact questions and myths we hear every week on Suffolk forecourts.
Critical Questions Answered by Fuel Recovery Experts
The Realities of Modern Fuel Contamination
​
Myth 1: "If it's just a small amount of petrol in a diesel, can I just fill it up with diesel and drive?"
The Reality: This used to apply to old, mechanical diesel engines from the 1990s. For any modern Euro 5 or Euro 6 common-rail diesel engine, this is highly dangerous. Even a 5% petrol mix reduces the lubrication of the fuel system enough to cause metal-on-metal wear in your high-pressure pump, sending metal filings directly into your injectors.
​
Myth 2: "Can I siphon the fuel out myself with a plastic tube?"
The Reality: Modern cars are built with anti-siphon grids, rollover check valves, and dual-chamber saddle tanks. A standard plastic tube will simply get stuck or fail to reach the second half of the fuel reservoir, leaving half the contaminated fuel inside to ruin your engine.
​
Question: How long does a mobile fuel drain take?
The Reality: Once our technician arrives at your location in Suffolk, the entire extraction, system line flush, fuel priming, and testing process takes between 30 and 45 minutes total.
​
Question: What happens to the bad fuel you drain from my car?
The Reality: We are fully licensed by the Environment Agency. All contaminated fuel mixture drawn from vehicles across Suffolk is stored in our specialized vehicle cells and transported to an authorized processing facility where it is strictly recycled and repurposed for industrial heating oils.
