133. In which lubrication application is a detergent type oil most likely to be used?

Detergent oils are best suited for trunk type diesel engines because they both lubricate and remove combustion contaminants. These engines experience significant contamination from blow-by and combustion products, necessitating the cleaning properties of detergent additives. Other applications, such as crosshead diesel bearings, steam turbines, and air compressors, require stable, clean, non-detergent oils to ensure proper function and avoid deposit formation or operational issues.