Designer‑water jokes and eye-rolls aside, the purple jug isn't cheap. Expensive oil is often a waste of money and a 5‑quart jug of Royal Purple can run $5 to $15 more than Mobil 1 and even ...

Royal Purple’s BioMax EAL products are suitable for use with marine hydraulic systems and gears, as well as stabilizers, rudders, thrusters, controllable pitch propellers and azipods. “Royal Purple is ...