Which Oil?

Richard Michell is a 64 year old Chemical Engineer. He developed through necessity a knowledge of the mechanical aspects of cars while at university, driving an MG TD and helping a fellow student race an MG-B. He put this knowledge to good use some years later when he joined an Australian petroleum company and took responsibility for the formulation, manufacture, and sale of its full range of lubricants. In 1989 he joined a privately-owned company that specializes in the contract manufacture of lubricants. He still consults to that company. Richard has owned many cars in the years since that original TD.   His current collection includes a Porsche 912, a Lancia Beta Spider, and an Austin 7 Sports. He uses his cars daily and does his own servicing and maintenance.