fd56ec0a_MOTOR_OIL_GUIDE__Use___Definition
[API Symbol] SH (1993 Gasoline Engine Warranty Maintenance Service) [Use & Definition] 
Service typical of gasoline engines in present and earlier passenger cars, vans and light trucks operating under vehicle manufacturer recommended maintenance procedures. Engine oils developed for this category provide performance exceeding the minimum performance requirements for API SG, which it is intended to replace, in the areas of deposit control, oil oxidation, wear, rust and corrosion. Engine oils meeting the API SH designation have been tested according to the Chemical Manufacturers Association (CMA) Product Approval Code of Practice, may utilize the API Base Oil Interchange and Viscosity Grade Engine Testing Guidelines and may be used where API Service Category SG and earlier categories have been recommended.
MOTOR OIL GUIDE
Use & Definition