Can Machine Oil No. 32 and Machine Oil No. 46 be used together? What are the hazards of using them together?

The information comes from the Internet: Oil type 32 is equivalent to old machine oil (type 3 spindle oil); it is used to lubricate the spindles of machine tools with speeds of over 1500 r/min, as well as the gearboxes in small and medium-sized high-speed cutting machines, drilling machines, grinding machines, milling machines, and thread processing machines； Horizontal machine tool guide rails with a sliding speed of 0.5 m/s and a load of less than 0.1 MPa ； Gearboxes for small wood processing machinery ； It can be used as hydraulic oil in hydraulic systems of casting equipment, woodworking machinery, starting packers, and other machines. In the textile industry, it is used to lubricate spinning frames, carding machines, ring spinning machines, weaving looms, and slitting machines. In addition, it can also lubricate motors with a rotation speed of over 1000 r/min and a power of under 100 kW, as well as small air compressors and pneumatic tools. It can be used as a base oil for quenching oils and cutting oils in metal processing, as well as a base oil for pharmaceuticals, cosmetics, and industrial white oils. Oil grade 46 is equivalent to the old grade 30 machine oil. It is widely used in the spindle boxes of various medium-sized machine tools, such as conventional machine tools, hexagonal machine tools, face mills, end mills, universal mills, and gantry mills, as well as in the gearboxes of gear machining machines, gear hobbing machines, gear shaping machines, sawing machines, slotting machines, and shaper machines. It can also be used for lubricating various machinery in the following industries: looms, slitting machines, carding machines, spinning frames, roughing mills, and fine spinning mills in the textile industry ； Pulp machines, papermaking machines, and drum machines in the paper industry ； Various medium-sized woodworking machines, foundry machinery, forging machinery, and agricultural and sideline machinery such as seeders, crushers, grinders, pulping machines, sugar extractors, wind turbines, and twisting machines ； Mechanisms for general ventilation such as blowers, medium-sized rotary pumps, and centrifugal pumps. Small water turbines, medium-sized motors with a power range of 100–400 KW and a speed of 1000 r/m or less, etc. It is also used as quenching oil, as a raw material for producing lubricants, and for formulating gear oil. In actual work, the masters do not use them together; please advise on the specific reason.

Mechanical oil is intended for use in fully lost-motion systems; its base oil can sometimes be blended. The additives used in 32 and 46 grade oils are the same, as both contain antioxidants. As long as the viscosities are suitable, they can be blended together.

The person on the third floor was partially correct; different types of machine oil contain various additives in different formulations when blended together. Each type of machine oil has different additives added to it based on the specific requirements of its intended use, in order to enhance certain particular properties. Therefore, mixing them together reduces their performance, and it is generally not advisable to do so