The SD just got record fuel economy (for itself). 29 mpg in mixed city/hwy. About 15% city.

But, it has a new head, 2.88 rear axle, 32/34 in the tires, PowerService in the tank, and speed kept below 68 mph.

I'm convinced that I can squeeze 30 out of it if I can keep it out of the city.

The odometer is accurate to .03%.