can you mix different brands of 2 cycle marine oil
Report Abuse. Mixing different blends or different brands of any oil is definitely NOT a good idea, especially when it deals with marine engines (2 or 4 stroke), vehicle transmissions, gearboxes, lower units and I/O sterndrives.e was asking about TC-W3 mixing with TC-W3 (plus) oil. Before the marketing of the plus oil, The factory recommended using the premium oil. When they had developed the synthetic enough to market, they added it to the line, as a substitute. You can use either. The question then becomes can you mix the two.