How much oil does a 1994 Ford F-250 7.3 Liter Manual Diesel need?

A 1994 Ford F-250 with a 7.3-liter diesel engine typically requires around 15 quarts (or approximately 14.2 liters) of engine oil when including the oil filter. It's essential to check the owner's manual for specific recommendations, as oil capacity can vary slightly based on factors like the type of oil filter used. Always ensure to use the appropriate oil type and viscosity for optimal engine performance.