Ford Fusion Curb Weight: 3,472 lbs to 3,986 lbs

At 59/41, the 3,472 lbs puts about 2,049 lbs on the front axle and 1,423 lbs on the rear — 626 lbs more over the front wheels, which is what front tires and front brake pads wear against first.

Identical body, 196 lbs apart: the 4dr Sedan Hybrid records 3,668 lbs against 3,472 lbs for the 4dr Sedan, a 5.7% increase carried by the battery, the second motor and the heavier transmission case.

The best EPA combined figure on the hybrid is 42 mpg against 27 mpg on the best conventional engine — 196 lbs of extra hardware for 15 mpg, or about 13 lbs per mpg gained.

The lightest 2015 record is 3,426 lbs; the lightest 2020 record is 3,472 lbs — 46 lbs heavier (1.3%).

At the top of the range the 2020 file reaches 3,986 lbs against 3,931 lbs in 2015, a 55 lbs increase — driven by which configurations exist, not by the same truck gaining mass.