There's no single definitive answer, but with proper maintenance, a Ford Excursion diesel engine can potentially last 300,000 miles or more. However, some may fail well before that mark, and others might surpass 500,000 miles.
Here's a breakdown influencing longevity:
* 6.0L Power Stroke (2003-2007): This engine is notorious for its problems, particularly with head gasket failures, EGR coolers, and injectors. Without significant preventative maintenance and repairs, reaching 300,000 miles is a significant achievement. Many experienced premature failures.
* 7.3L Power Stroke (1999-2003): Generally considered more robust and reliable than the 6.0L, the 7.3L is known for its durability. With proper care, these engines can easily exceed 300,000 miles.
Therefore, while high mileage is possible, relying on a used Excursion diesel without a thorough inspection and service history is risky. You should thoroughly research the specific engine's known issues and look for evidence of regular and meticulous maintenance before purchasing.
