Christo-Lube MCG 111 ( for dynamic applications ) tube. Many diving industry manufacturers as well as ANDI are recommending Lubrication Technology’s Christo-Lube M.C.G™ as the preferred lubricant for all high-pressure service applications, even Air service. Manufacturers such as Beuchat, Oceanic, Pro-Sub, Scubapro and Sherwood all use Christo-Lube TM in the assembly process for EAN, Oxygen and even Air-only equipment. This lubricant is virtually inert and possesses a high degree of lubricity compared to other Oxygen-contact-approved products. Many believe this product to be the best product available for this purpose.