1. Stop driving immediately: The engine should not be run under any circumstances. Towing is necessary.
2. Check the oil level: This is likely to be higher than normal and the oil will be diluted and possibly discolored (darker, possibly with a fuel smell). Do not remove the dipstick if you see excessive pressure.
3. Call a qualified mechanic: This isn't a DIY fix. You need a professional to diagnose the source of the leak and repair it. Explain the situation clearly – diesel fuel in the oil pan.
4. Do not attempt to drain the oil yourself: While tempting, draining the oil before professional assessment could hinder the diagnosis. A mechanic needs to see the condition of the oil to determine the extent of the damage.
5. Have the vehicle towed: Avoid driving the vehicle as it's risking further damage to the engine.
Possible causes (that only a mechanic can diagnose):
* Failed fuel injector(s): This is a common cause, where fuel is leaking past the injector seals into the cylinder and subsequently into the oil pan.
* High-pressure fuel pump failure: A failing fuel pump can leak fuel into the engine.
* Cracked or damaged fuel lines: A leak in the fuel lines can allow fuel to enter the engine.
* Other internal engine leaks: While less common, a crack in the engine block or other internal component could cause this.
Ignoring this problem will lead to catastrophic engine damage, including:
* Dilution of the engine oil: Fuel reduces the oil's lubricating properties, leading to increased engine wear and potential seizure.
* Hydrolock: Fuel in the cylinders can prevent the pistons from moving, leading to serious engine damage.
* Premature engine failure: The combined effect of the above can quickly destroy the engine.
This is a serious issue that demands professional attention. Immediate action is crucial to minimize damage and repair costs.
