http://www.freepatentsonline.com/y2006/0223718.html Some interesting info on the components of Shell's racing oils. Some comparative info on competitor racing oils also.
In the past, racing oils were formulated using “conventional oils” as a base oil. Conventional oils are used to lubricate engines in passenger vehicles. To formulate a racing oil, a “conventional oil” was simply modified, typically by adding anti-wear and/or antifriction additive(s), in an effort to meet the high performance requirements of racing oils. Unfortunately, conventional oils contain a number of additives that may be necessary to meet industry specifications applicable to conventional oils, but that are not necessary or even helpful in racing oils. Some of the additives found in conventional oils actually have a negative impact on performance in a racing oil. Conventional oils and racing oils are exposed to completely different conditions. Passenger vehicles provide transportation over long periods of time under relatively mild conditions. Racing oils are used to lubricate very expensive engines under extremely intense conditions. Racing oils must provide excellent engine protection under high loads at high temperatures over short periods of time. The present application provides specially formulated racing oils having optimal overall performance. The racing oils are formulated using a base oil comprising polyalphaolefin and using only “racing oil components.” Only those additives which provide a performance benefit, or which are required to provide effective racing oil properties are used in the racing oil formulations. Different types of oils for different racing applications are efficiently and effectively formulated to meet the rapid demands of racing teams. The racing oil comprises base oil, ester, and a sufficient quantity of the racing oil components to provide effective racing oil properties. Effective racing oil properties include, but are not necessarily limited to a specified kinematic viscosity at 100° C. and a coefficient of friction of about 0.065 or less at 180° C. The specified kinematic viscosity of the racing oil at 100° C. will vary with the grade of racing oil. Generally, the specified kinematic viscosity at 100° C. is from about 3.2 centistokes (cSt) to about 25 cSt.