Phillips 66 Megaflow AW HVI 46 is a premium mineral based lubricant that is used in Hydraulic Systems. Megaflow is a line of Phillips 66 Lubricants that are premium hydraulic fluids with outstanding oxidation resistance. "AW" signifies that this fluid contains zinc anti-wear additive to protect hydraulic pumps from premature wear. "HVI" refers to High Viscosity Index which means it has great flow properties in extreme temperature conditions. 46 represents the thickness of the oil which is an International Standards Organization Viscosity Grade (ISO VG) 46.
You will also find this line of Megaflow Hydraulic Fluids formerly under the 76 Lubricants and Conoco Brands which Phillips 66 Lubricants purchased.