What causes the increase and emulsification of engine oil in the Lexus NX?
4 Answers
The reasons for the increase and emulsification of engine oil in the Lexus NX are: 1. A large amount of gasoline is injected during engine startup, and cold starts and cold seasons cause the oil temperature not to rise, making it difficult for gasoline to evaporate, resulting in an increase in oil volume; 2. Emulsification caused by water mixing into the engine oil. The Lexus NX is a mid-size car with body dimensions of: length 4640mm, width 1845mm, height 1645mm, wheelbase 2660mm, and a body structure of a 5-door, 5-seat SUV. The Lexus NX is equipped with a 2.0L naturally aspirated engine and a 2.5L naturally aspirated engine, paired with a continuously variable transmission (CVT) and an electronic continuously variable transmission (e-CVT).
When I encountered the issue of oil dilution and emulsification in my Lexus NX, I did some research and found that it might be caused by the design of the direct-injection engine. During short-distance driving, incomplete combustion of gasoline can seep into the engine oil, or coolant leakage can mix with the oil, causing it to thin and foam. Some Lexus models are prone to this common issue, and it needs to be addressed promptly to avoid engine damage. I often remind car owners to pay attention to dashboard warning lights and regularly check the oil dipstick and coolant levels. If you notice a sweet smell or white foam, take the car to a shop immediately for a diagnostic scan to avoid major repairs. Safety first—don’t delay. Replacing the oil and conducting system tests can extend the car’s lifespan.
My Lexus NX had an issue with oil dilution and emulsification, which was really scary! The reason was gasoline mixing into the engine oil or coolant leakage from the cooling system, causing the oil to turn white and expand. Especially during winter with frequent short-distance driving, low temperatures slow down gasoline evaporation, leading to accumulation. That time, I promptly went to the dealership, and the technician said it was due to aging seals. It was resolved by spending a small amount to replace them. I recommend you regularly check the oil color changes; if it appears cloudy or milky, don’t hesitate to seek professional inspection immediately. After all, delaying could lead to engine failure, affecting driving safety. During maintenance, ensure you replace with high-quality coolant and engine oil, and regularly clean the filter screen to prevent recurrence.
With years of experience in car repair, I've frequently encountered cases of oil dilution and emulsification in the Lexus NX. The main causes are fuel dilution or cooler failure, where mixed fluids cause the oil to emulsify and lose its lubricating properties. The inspection method is straightforward: first, check the dipstick for excessive foam or discoloration, then examine if the coolant is depleting rapidly. Experience tells me that piston ring wear or seal failure are common culprits, and minor issues left unattended can lead to engine damage. Owners should avoid frequent short trips, ensure proper warm-up, and use genuine parts for replacements. Early detection saves both money and hassle.
