Question 1

What is MPGe and how is it calculated?

Accepted Answer

MPGe (Miles Per Gallon equivalent) compares EVs to gas cars. Based on 33.7 kWh = 1 gallon of gas energy. If EV uses 30 kWh/100mi: MPGe = 3370 ÷ 30 = 112 MPGe.

Question 2

How efficient are EVs compared to gas cars?

Accepted Answer

EVs are 3-4x more efficient in energy use. Average EV: 100-130 MPGe. Average gas car: 25-35 MPG. But electricity sources and charging losses affect total efficiency.

Question 3

Why does the US use MPG while others use L/100km?

Accepted Answer

MPG (higher = better) is intuitive for comparing. L/100km (lower = better) better shows fuel savings - halving consumption halves L/100km but doesn't double MPG.

Question 4

How does speed affect fuel economy?

Accepted Answer

Most vehicles are most efficient at 45-65 mph. Above 65 mph, every 5 mph increase is like paying an extra $0.20-0.30 per gallon.

MPGe to kWh/100mi Converter

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