What kind of oil should be added to a grass trimmer?
2 Answers
Grass trimmers require engine oil. Below is an introduction to engine oil. Introduction to engine oil: Engine oil, also known as engine lubricant, has a density of approximately 0.91×10kg/m3. It serves multiple functions for the engine, including lubrication and friction reduction, auxiliary cooling, sealing to prevent leaks, rust and corrosion prevention, and shock absorption. It is often referred to as the 'blood' of a car. Engine oil consists of two main components: base oil and additives. The base oil is the primary component of the lubricant, determining its fundamental properties, while additives compensate for and improve any deficiencies in the base oil's performance, providing new characteristics. Additives are an essential part of the lubricant. Classification of engine oil: Engine oils on the market can be broadly categorized into two types based on their base oil: mineral oil and synthetic oil (vegetable oil is not considered due to its scarcity). Synthetic oils are further divided into full synthetic and semi-synthetic.
Over the years of maintaining lawns, I've gained extensive experience with grass trimmers and understand the critical importance of oil selection. Most household grass trimmers use two-stroke engines, which require a mixture of gasoline and oil, typically at a 50:1 ratio—meaning one bottle of gasoline mixed with a small amount of oil, thoroughly blended before use. Using pure gasoline can cause rapid internal engine wear and seizure. My neighbor once tried to save money this way, only for the machine to break down mid-use, leading to costly repairs. Additionally, some high-end models feature four-stroke engines, which require separate fueling: gasoline goes into the fuel tank, while oil is added to the crankcase port. Before refueling, it's best to check the manual for confirmation. When mixing fuel, use a dedicated container to prevent spills, and avoid using leftover car fuel to prevent clogging the machine. For maintenance, since oil evaporates quickly in summer, regularly check the oil level and mixture ratio to ensure smooth operation—just like a car engine, keeping it hassle-free and minimizing breakdowns.
