WARNING   WARNING:  Do not add engine oil when the engine is hot. Failure to follow this instruction could result in personal injury.

Your vehicle has an Intelligent Oil Life Monitor™ that calculates the proper oil change service interval. When the information display indicates: OIL CHANGE REQUIRED, change the engine oil and oil filter.   See   Information Displays. 
The engine oil filter protects your engine by filtering harmful, abrasive or sludge particles and particles significantly smaller than most available will-fit filters.   See   Motorcraft Parts - 6.8L. 
  1. Unscrew the oil filter and oil pan drain plug and wait for the oil to drain.
  1. Replace the filter.
  1. Reinstall the oil pan drain plug.
  1. Refill the engine with new oil.   See   Capacities and Specifications - 6.8L. 
  1. Reset the Intelligent Oil Life Monitor™.   See   Information Displays. 
Engine Lubrication for Severe Service Operation
The following conditions define severe operation:
  • Frequent or extended idling such as over 10 minutes per hour of normal driving.
  • Low-speed operation or stationary use.
  • If the vehicle is operated in sustained, ambient temperatures below -9 °F (-23 °C) or above 100 °F (38 °C).
  • Frequent low-speed operation, or consistent heavy traffic less than 25 mph (40 km/h).
  • Operating in severe dust conditions.
  • Operating the vehicle off road.
  • Towing a trailer over 1,000 mi (1,600 km).
  • Sustained, high-speed driving at the gross vehicle weight rating.
  • Use of fuels with sulfur content other than ultra-low sulfur diesel (ULSD).
  • Use of high-sulfur diesel fuel.
Only use engine oil that meets our specifications.  See   Capacities and Specifications. 

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