Biodiesel is a legitimate fuel, not the wrong fuel. Australian pump diesel may already contain up to five percent biodiesel without labelling, and most modern diesels handle that without any issue. Higher blends such as B20 are worth checking against your manufacturer first. Biodiesel makes people nervous in a way that ordinary diesel does not,…
A short period of rough running immediately after a fuel drain is normal, because a little air and residual fuel remain in the lines. Roughness that continues beyond the first few minutes, or past the first tank of fuel, usually points to a fouled filter, fouled spark plugs, or damage from before the drain. The…
If the engine was never started, wrong fuel sitting in the tank for days causes very little extra harm, because the contamination stays where it is. The exception is AdBlue, which is corrosive and does get worse with time. The bigger risk of waiting is that somebody else starts the car. This question usually arrives…
No fuel additive can fix wrong fuel. Nothing sold in a bottle separates petrol from diesel once they are mixed, and no additive removes water or sludge from a tank. Additives are maintenance products for fuel that is basically sound, not a rescue for contaminated fuel. It is a reasonable thing to hope for. You…
Sugar does not dissolve in petrol or diesel, so it cannot caramelise inside your engine the way the legend claims. It sinks and sits at the bottom of the tank, where the real risk is granules blocking the fuel pickup and filter. The fix is a tank drain, not a new engine. Pour sugar in…
Water gets into a fuel tank through rain and flooding around the filler, condensation inside a part empty tank, ethanol blends absorbing moisture until it separates out, and water that was already sitting in a service station’s underground storage tank before it reached your car. Water is the contamination nobody expects, and at Wrong Fuel…
To avoid putting the wrong fuel in your car, know which fuel your vehicle takes before you arrive, read the words on the pump rather than trusting the colour, and check the nozzle against your filler cap label before you squeeze the trigger. Distraction causes most misfuels. At Wrong Fuel Help we get called out…
AdBlue misfuelling happens more in trucks and fleets than anywhere else, because drivers refill AdBlue routinely and the two fillers sit side by side. If diesel and AdBlue get crossed in either direction, park the vehicle, keep the engine off and have the affected tank drained before it runs. Ask any transport operator where AdBlue…
AdBlue is used by most new diesel cars, utes and 4WDs sold in Australia, and by no petrol vehicles at all. The quickest ways to check are a blue filler cap near the diesel filler, an AdBlue gauge or warning in the dash menu, and your owner’s manual. Here is a question we get asked…
If you have put diesel in the AdBlue tank, do not start the engine. Diesel destroys the AdBlue dosing pump, lines and injector. It can also ruin the SCR catalyst which is one of the most expensive parts on the vehicle. The tank must be emptied and flushed completely before the system is restarted. There’s…
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