The Castrol Magna™ CL Range 150 - 460 viscosity grades (previously called Castrol Cresta™ VA range) are formulated with high quality mineral base oils, with the addition of friction and lubricity modifiers to increase the film strength and reduce friction. Magna CL 150 - 460 grades are compounded oils suitable for cylinder lubrication in reciprocating type gas compressors dealing with “wet” petroleum gases. Magna CL 1000 (previously called Cresta™ SHS) is formulated from selected base cylinder stocks to achieve the desirable characteristics of high flash point and oxidation stability. It possess good demulsibility, which means for the lubrication of the cylinders of high speed, totally enclosed steam engines, it does not materially reduce the demulsibility of the crankcase oil.
Magna CL 150- 460 grades are formulated for the cylinders and bearings of older type gas engines. It is blended with fatty agents (also termed “compounded”). The compounding agent provides improved load carrying properties and thus enables the oil to be used for other duties, particularly where higher loads occur or where moisture is present. Magna CL 1000 is designed for lubrication of steam engine cylinders and valves. It is also suitable for other purposes, such as the lubrication of heavily loaded slow-moving bearings and gears. It is also suitable for condensing engines using high pressure steam up to 200psi and superheat up to 345°C/653°F. Higher viscosity products from Magna CL range can also be used in worm gearboxes.