Crankcase dilution

It is more common in situations where fuel is injected at a very high pressure, such as in a direct-injected diesel engine.

If the engine is cold, or there is an excess amount of cooling around the cylinder,[1] the fuel oil will condense and have a higher chance to end up in the crankcase.

[2] Another way that the fuel oil can end up in the crankcase is because there is too much wear on the piston compression rings.

This lack of lubrication can cause the engine to have an increased amount of wear over time.

Another thing that can reduce the effects of crankcase dilution is changing the piston compression rings when they become worn.

Another thing that can be done is to change the car's oil regularly to avoid the wear on your engine from crankcase dilution.

Biodiesel is vegetable oil or animal fats that are mixed with lipids to produce alcohol that can be burned.

The biodiesel fuel finds its way into the crankcase of the engine and mixes with the lube oil.

The biodiesel has a higher boiling point than regular fuel and is less likely to evaporate out causing it to stay in the crankcase for a longer period of time.