What was the price per kilogram of waste engine oil in 2021?

[AdalynnFitz]

One liter of engine oil weighs approximately 0.85-0.93 kilograms. Engine oil, also known as motor lubricant, serves multiple functions such as lubrication and friction reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption. It is often referred to as the 'blood' of a car. Related introduction: The engine is the heart of a car, containing many metal surfaces that move against each other. These components operate at high speeds under poor conditions, with working temperatures reaching 400°C to 600°C. Advanced technology can convert natural gas into crystal-clear fully synthetic base oil, which is then enhanced with unique power cleaning technology to create lubricants with superior cleaning and protective performance. Under such harsh operating conditions, only qualified lubricants can reduce engine component wear and extend service life. In the market, engine oils are broadly categorized into mineral oils and synthetic oils based on their base oil composition. Synthetic oils are further divided into fully synthetic and semi-synthetic. Lubricant base oils are primarily classified into two major types: mineral base oils and synthetic base oils.