My 97 1500 4x4 hardly ever makes it up to 60 mph.
It's what you might call a weekend-warrior mobile and the streets between my house and the Home Depot don't allow for speeds that high.
Typical payload includes me, 20+ ounces of hot coffee, and my itty-bitty 48lb. black lab female. On those lucky Saturday mornings I have either a 40lb. or 60lb. co-pilot that warmly calls me daddy (might have to teach one of them to operate a stopwatch for me this coming weekend
).