6.7 PowerStroke DEF Consumption: Typical Usage Rates

Most 6.7 PowerStroke diesel engines consume between 2-4% of their diesel fuel as diesel exhaust fluid (DEF). This translates to roughly 1-2 gallons per 100 miles driven under normal conditions.

Factors Affecting DEF Usage

  • Driving conditions and habits
  • Engine load and operating temperature
  • Vehicle maintenance and tune-up status
  • Environmental conditions

Average DEF Consumption by Driving Style

  1. City driving: Higher consumption due to frequent stops and idling
  2. Highway driving: Lower consumption with steady speeds
  3. Heavy towing: Increased usage from engine strain

DEF Usage Comparison

Driving Condition DEF Consumption Rate Estimated Cost per 100 Miles Time Between Refills
City Driving 3-4% $3-5 100-150 miles
Highway Driving 2-3% $2-3 200-300 miles
Heavy Towing 4-5% $4-6 80-120 miles

Monitoring DEF Levels

  • Dashboard warning lights indicate low levels
  • Regular monitoring prevents unexpected downtime
  • Typical refill interval is every 5,000-7,000 miles