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Which would use less fuel?
5th gear, WOT
0%
0
4th gear, 85% throttle
0%
0
3rd gear, light throttle
0%
0
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Which would use less fuel?
#4
Wouldn't the option with the least amount of throttle be the most efficient because you're not dumping as much fuel into the engine?

edit: I think the example is flawed/misleading because 3rd gear wouldn't be light throttle, it would be a light throttle increase. You'd still need more throttle to start with to do the 45mph stated to begin with. So my answer is it really depends on the gearing of the car and how much throttle required to maintain 45 in each gear.
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