Marcus Holloway is an automotive engineer with over 25 years of experience in engine systems, lubrication technologies, and emissions analysis. He has worked extensively with small engines, including Craftsman push mowers, advising on optimal oil types, viscosity ratings, and maintenance practices. Holloway is also an expert in exhaust gas analysis, helping manufacturers and regulators interpret emissions data for performance and environmental compliance. His technical guides on engine oil selection and rating systems are widely used by both professionals and consumers. Combining engineering precision with practical insights, Holloway has become a trusted authority in automotive maintenance and sustainability, contributing to industry publications and engineering standards committees.