What is the engine oil capacity of your 2008 Ford F-550 gas engine?

The engine oil capacity for a 2008 Ford F-550 with a gas engine, specifically the 6.8L V10, is approximately 6 quarts (5.7 liters) when using a filter. If you're changing the oil without replacing the filter, the capacity is slightly less. Always consult the owner's manual for the most accurate information for your specific vehicle.