升/100公里--
英里/加仑 (MPG)--
以上结果为等效换算

油耗怎么算?L/100km 与 MPG 的区别

中国、欧洲等大部分地区使用升/百公里 (L/100km),数值越低越省油。美国、英国常用英里/加仑 (MPG),数值越高燃油效率越好。两者本质相同,只是单位相反。

换算公式 L/100km = (消耗燃油 L ÷ 行驶里程 km) × 100
MPG = (行驶里程 miles) ÷ (消耗燃油 US gal)
单位换算常数:1 英里 = 1.609344 公里;1 美制加仑 = 3.785411784 升

示例:一辆车加了25升油,行驶了300公里,油耗 = 25 ÷ 300 × 100 ≈ 8.3 L/100km。换算成 MPG:300 km ≈ 186.4 miles,25 L ≈ 6.6 gal,MPG ≈ 186.4 ÷ 6.6 ≈ 28.2 MPG。

影响油耗的主要因素

  • 驾驶习惯:急加速、急刹车显著增加油耗。
  • 轮胎压力:胎压过低增加滚动阻力。
  • 载重与风阻:后备箱长期负载、车顶行李架增加消耗。
  • 路况与天气:市区拥堵、低温短途行驶油耗明显升高。

常见问题

仪表盘显示的油耗准吗?

只是参考,可能比实际偏低5%-10%。实测更可靠。

为什么冬天油耗更高?

低温导致发动机暖机时间长,机油黏度增加,暖风等额外耗能。

70公里/小时最省油是真的吗?

大致正确。多数车在60-90 km/h区间达到最佳燃油效率。

L/100km--
Miles per Gallon (MPG)--
Equivalent conversion

How to Calculate Fuel Economy

L/100km is the most common metric measure, while MPG is used in the US. Both measure the same thing but are inversely related.

Conversion Formulas L/100km = (Fuel L ÷ Distance km) × 100
MPG = (Distance miles) ÷ (Fuel US gal)
Constants: 1 mile = 1.609344 km; 1 US gal = 3.785411784 L

Example: Car uses 25 L over 300 km → 8.3 L/100km. In US terms: 300 km ≈ 186.4 miles, 25 L ≈ 6.6 gal → 28.2 MPG.

Factors Influencing Fuel Consumption

  • Driving style: Aggressive acceleration/braking increases consumption.
  • Tire pressure: Under-inflated tires raise rolling resistance.
  • Load and aerodynamics: Heavy loads, roof racks add drag.
  • Weather and traffic: Cold starts, stop‑and‑go driving worsen economy.

FAQ

Is the dashboard MPG accurate?

It can overestimate by 5-10%. Manual calculation is more reliable.

Why does fuel economy drop in winter?

Engines take longer to warm up, oil thickens, and heaters consume extra energy.

What is the most fuel-efficient speed?

Generally between 50-65 mph (80-105 km/h) for most vehicles.