Reg,
mineral oil derivates have infinite name variants in different countries. Be sure, vhen mvvs substitutes the "paraffin" oil for castor it means a mineral oil derivative that is a low viscosity lubricant-detergent. This practice was used many years ago. in order to reduce the viscosity of castor, particularly in cold climates, or for giving engine higher speed due to the reduced viscosity of the lube, without reducing the lube percentage. In those times none was thinking about synthetics . This oil has a high boiling point and a high purity, it has the lowest sulphur and aromatics of all mineral derived oils since it is heavily hydrothreated. Its most known use is as the almost total ingredient in baby oils. Do you think really someone wetting babies with kerosene?
Ugo