1) Fuel injector failure. If a fuel injector fails, it can allow fuel to leak into the engine oil. This is most likely to happen with high-pressure injectors, which are more prone to failure than low-pressure injectors.
2) Cracks or leaks in the fuel lines. If there are any cracks or leaks in the fuel lines, fuel can leak into the engine oil. This is most likely to happen if the fuel lines are old or damaged.
3) Worn piston rings. Worn piston rings can allow fuel to leak into the engine oil. This is most likely to happen if the engine is old or has high mileage.
4) Defective fuel pump. A defective fuel pump can cause fuel to leak into the engine oil. This is most likely to happen if the fuel pump is old or damaged.
If you suspect that diesel fuel is getting into the engine oil on your Cat C15 engine, it is important to have it diagnosed and repaired by a qualified technician as soon as possible. Diesel fuel in the engine oil can lead to a number of problems, including:
* Engine damage
* Reduced performance
* Increased fuel consumption
* Increased emissions
