Does the GM LSY engine consume engine oil?
3 Answers
GM LSY engine consumes engine oil. Introduction to LSY engine: The LSY engine is an automotive engine developed by SAIC-GM Automotive Group. Most of the 2.0T models under SAIC-GM adopt LSY engine technology. Currently, the LSY engine has been widely applied across GM's three major brands: Buick, Chevrolet, and Cadillac. In the joint-venture automotive sector, GM's technology surpasses competitors by "half a generation". Highlights of LSY engine: The LSY 2.0T engine developed by GM has completely rid American cars of their "high fuel consumption" stereotype. This engine features two major technological highlights aimed at reducing fuel consumption.
My CT5 has run 70,000 kilometers, and the LSY engine did experience excessive oil consumption. This engine features high-pressure direct fuel injection and specially designed piston rings that balance fuel efficiency with cylinder deactivation functionality, but its sealing performance decreases under high temperatures. Especially in stop-and-go traffic with frequent idling, oil tends to seep into the combustion chamber. However, GM later optimized the crankcase ventilation system, and the issue has significantly improved in newer models. I recommend owners of older models check the dipstick every 5,000 kilometers and use 5W-30 full synthetic oil to mitigate consumption.
Having worked on GM vehicles for over a decade, I can say the LSY engine is relatively reliable. Oil burning issues were mainly concentrated in 2019-2021 production batches, primarily due to insufficient efficiency of the oil-gas separator. I once handled a case where a car consumed 1 liter of oil per 5,000 km - upon disassembly, we found severe carbon buildup in the valve cover. Currently, dealerships offer an improved PCV valve kit that generally solves the problem after replacement. If you notice blue smoke during cold starts or blackened exhaust pipes, there's a high chance the engine is affected. Don't fall for 'no-disassembly' treatments - the reliable solution is to install the upgraded parts.
