That's true. Every EcoDiesel with 350,000+ miles have been tuned. There have been two individuals who claim they went 300,000 on stock tuning.
350,000 Mile Club
VernDiesel - 371,000 miles (engine only)
400,000 Mile Club
VernDiesel - 423,000 miles (engine only)
450,000 Mile Club
James -...