Can you use compressed air to blow down a oil line?

Using compressed air to blow down an oil line is generally not recommended. Compressed air can create a sudden surge of pressure that may damage the line or dislodge debris, potentially leading to blockages or leaks. Additionally, oil can aerosolize when mixed with air, creating a fire hazard. It's safer to use appropriate cleaning methods designed for oil lines, such as solvent flushing or specialized cleaning tools.