With the A747, Castrol offers an absolute high-performance two-stroke castor/synthetic engine oil. Developed to minimize run-in time in racing, keep the sparkplug clean and prevent throttle slide sticking in wet weather conditions. In order to reduce run-in time, lubrication will have to be minimized at the same time so that a fast bedding-in of piston and Nikasil plating can be achieved. The A747 may therefore not be used with cast-iron cylinders as this would result in premature wear. Due to its special contents and composition, this oil cannot be blended with other, conventional engine oils and not be stored at temperatures below 0, as it would start to precipitate.