What Causes the Increase in Engine Oil Level in Honda Civic?

[CaliDella]

Honda Civic experiences an increase in engine oil level due to the following reasons: 1. Engine design flaw where gasoline sprayed into the cylinder during cold starts condenses on the cylinder wall and flows into the crankcase. Honda's 1.5T engine, when not preheated, has side-mounted fuel injectors that spray atomized fuel onto the colder cylinder walls. Without preheating, the atomized gasoline forms droplets upon contact with the cold cylinder walls. These droplets are then scraped into the crankcase by the piston rings, mixing with the engine oil and circulating with it. Over time, this leads to an increase in oil level and emulsification. 2. Poor design of the engine's PCV (Positive Crankcase Ventilation) valve, which fails to promptly expel gasoline that enters the engine.