Question

what is the most economical speed of a Passenger car

Answer 1

Increasing your highway cruising speed from 55mph (90km/h) to 75mph (120km/h) can raise fuel consumption as much as 20%. You can improve your gas mileage 10 – 15% by driving at 55mph rather than65mph (104km/h).

Answer 2

heya!!
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here is your answer:

Increasing your highway cruising speed from 55mph (90km/h) to 75mph (120km/h) can raise fuel consumption as much as 20%. You can improve your gas mileage 10 – 15% by driving at 55mph rather than65mph (104km/h).

hope it helps!!
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