Castrol Magna slideway oils are a range of lubricants based upon highly refined mineral oils, which incorporate tackiness and lubricity additives to give smooth slideway movement under heavy loads. The range incorporates grades to suit most of the machines, details of their particular applications being given below. Magna BD 68 and - are slideway oils with a high degree of lubricity and good load carrying properties. Magna BD 68 is the normal recommendation for horizontal slideways.