Shell-Mex Ltd. have introduced a new standard grade spirit — ” Racing Shell” — to meet the needs of racing cars and motor cycles and super sports machines having extra-high compression or supercharged engines.
” Racing Shell” consists essentially of a concentration of the natural anti-knock hydrocarbons exclusive to and a feature of all petrols sold by Shell. These hydrocarbons are isolated and enhanced by a special process and blended to a new Shell formula. “Racing Shell” is designed for use neat, or admixed in suitable proportions with ” Shell,” according to the particular requirements of individual ” Super Sports” or ” hotted-up ” engines. Directions for use will be found on every can.