Piston Slap: The Fallacy of Engine Hour Meters?

Ryan writes:

Sajeev Mehta

It appears that you have picked up where Steve Lang left off. That is answering general automotive questions that puzzle automotive enthusiast.

My question, what average speed would be good or bad for a used vehicle? I am in the market for a used truck (3-6yrs old), and have noticed that these newer trucks have mileage and hours tracked in the dash display screen. It is easy math to calculate the average speed for the life of the vehicle. What should I look for?

Or run from?

Best and brightest?

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