Aerospace lubricant technology, now available for your engine! Introducing, PurOl s Onyx Series. This New purpose-built break in oil formulation is specifically designed to properly break in your fresh engine. It also prevents to reduce the potential of engine failure and wear during the engine break in process. PurOl Onyx series was purpose-built with the help of the top engine builders and engineers in the automotive industry. This proprietary technology contains unique high levels of zinc-diakldithiophosphates, in combination with PurOl s proprietary zinc, phosphorous and molybednum blends which extends oil film capacity for proper ring seating. Professional engine-builders that use PurOl Onyx Break-In Motor Oil will experience the difference provided by numerous barriers of protection. This product is field tested and suitable for use in all high performance and racing type engines especially those using flat tappet and/or roller cams operating at high RPM s and requiring high-pressure (stiff) valve springs. PurOl Onyx Series Break-In Motor Oil is available in SAE 30 and 40 weights.