Does the Envision have an oil burning issue?
2 Answers
Envision does have an oil burning phenomenon. When engine oil burns, the first thing to check is whether there's an issue with the engine crankcase ventilation pipe. Additionally, it's necessary to consider whether the piston rings or valve stem seals are damaged. For a new Buick Envision burning oil, the lubrication function of engine oil is to reduce friction resistance between relatively moving parts such as piston rings and cylinder walls when the engine is running, thereby slowing down wear. A thin oil film forms on the inner wall surface of the cylinder. During the combustion process of the air-fuel mixture, part of this oil film gets burned along with the high-temperature combustion gases. The steam generated by the high-temperature oxidation of engine oil will also draw a small amount of oil vapor into the combustion chamber through the crankcase ventilation system to be burned. Therefore, it's normal for some oil consumption to occur within a regular maintenance cycle.
After driving my Envision 1.5T for 50,000 kilometers, I've indeed noticed faster-than-usual engine oil consumption. It requires about half a liter of oil top-up within the maintenance interval, and my friend's same model has similar issues. This is particularly noticeable during rapid acceleration or long-distance driving. Experienced mechanics explain that this is due to a design issue with the engine's oil-gas separator in this model, causing some oil to enter the combustion chamber and participate in burning. They recommend regularly checking the oil dipstick, using low-ash full synthetic oil, and replacing the separator with an improved version if necessary. Veteran owners jokingly call this a 'common issue,' but it actually has little impact on the engine as long as you keep an eye on it.
