Gears and Gearmotors Oil Omala Oil S4 WE320 Omala S4 WE 320: Recommended synthetic gear oil for Bonfiglioli worm gearbox VF and W, for Bonfiglioli bevel gear type A helical gear type C and flat gear type F.Available in 1-2-5-10 L cans. For safety data sheet and product information see under 'Documents'. Omala Oil S2 G220 Omala S2 G 220 mineral gear oil for Bonfiglioli planetary gear and axle gear type TA.Available in 1-2-5-10 L cans. For safety data sheet and product information see under 'Documents'.