How much def is required for a 6.7L diesel engine?

The amount of diesel exhaust fluid (DEF) required for a 6.7L diesel engine typically depends on the specific vehicle and its operating conditions. Generally, the consumption rate is about 2-3% of the diesel fuel consumed. Therefore, for every 100 gallons of diesel fuel, you might need approximately 2 to 3 gallons of DEF. Always consult the vehicle's owner manual for precise specifications.