The gas station will sell car(Gear) lubricant. You can use it for submerisble pump. Our lubricant spec. is as below: Light Medium,Short for LM,Spec.: SAE 10,ISO VG46. Oil volume: 240~270ml. The viscosity=ISO grade 46.
Oil seal spec.: 0.5~1hp=16(Inside diameter)x26(Outer diameter)x5(Thickness)mm, 2~3hp=20x28x5t, 5~7.5hp=25x44x7t. You can only buy oil seal from original pump supplier or seal supplier.
You can purchase lubricant or gear oil from any gas stations locally. The oil spec. is(Light Medium,short for LM),SAE 10,ISO VG46. The AGMA gear oil#=1 or 1S, Viscosity range(40℃ )=41.4 ~ 50.6 , ISO viscosity grade=ISO VG46.