How to save fuel

How to save more fuel at car drivingThe key to low fuel consumption: Understanding all the physics applicably for car driving.

Wheel bearings defect

Imagine Your car’s front wheel bearings are defect. You hear a noise at low speed. The noise becomes louder and louder at higher speeds. When You reach 100 km/h, You think they will be irrevocably defect in the next seconds. You go behind a big transporter driving 90..100 km/h and enjoy the next tank stop. You can go in 15m distance into the wind shadow of a big truck. This is no safety problem, because big trucks have less deceleration than small cars.

The holes in the engine’s exhaust

Imagine You have some big holes in Your car’s engine’s exhaust. Your car is very loud when You drive in a common style. Imagine there is a city with a policeman every 50m. Every policeman will stop You for noisiness or for driving to slow. You have to be as fast as the other traffic, but be aware, You have also to be silent despite the holes.

When You are able to drive with the holes between all the policeman without trouble, Your car will consume 25% less than DIN norm for city traffic.

Clarification: the holes in the exhaust have nothing to do with the low fuel usage. They forced me only to change my driving style, because a normal driving style is terrible loud with this technical defect. I switched to the next gear at 1500 turns per minute. I tried to roll with as less changes of speed as possible. You can see the surprising results at my Renault Espace fuel statistic in winter 1995 to 1996.

Simulate Your driving style in the staircase

A major factor in energy usage at city traffic is speed change. You can simulate this factor in the staircase of a 14 floor high building. Let’s assume 250 cm high rooms and 30 cm thick floors. You see on the left to each floor a speed equivalent.

A green green traffic light 300 m ahead. It is unknown at what time the light will change to red. Your current speed is 53 (floor 4)

  • The real tilt turbo Porsche driver: accelerates to 99 (floor 14)
  • Standard driver: continues with same speed
  • Fuel economize driver: continues with same speed

The light changes after 5 seconds to red.

  • The real tilt turbo Porsche driver: brakes to 0 (floor 0). He waits for the green light and accelerates again to 53 (floor 4) and wails all the time about the slow cars in front of him.

Equivalent for all speed changes is 18 floors up.

  • The standard driver: continues with same speed. He comes to early and he has to break and accelerate again to 53.

Equivalent for all speed changes is 4 floors up.

  • Fuel economic driver: let it roll. The car becomes slower and slower. He comes with 37 (floor 2) to the green light. He accelerates again to 53.
    Equivalent for all speed changes is 2 floors up.

More Fuel-Saving Tips

  • Do not use the clutch too much.
  • Switch the vehicle off at red light stops.
  • Drive in gear corresponding to the speed.
  • Get your vehicle serviced regularly.
  • A poorly tuned engine can increase fuel consumption by up to 50%
  • Driving at 90 kilometers an hour rather than 100 can reduce fuel consumption by 10%
  • Under inflated tires can increase fuel consumption by 5%
  • A loaded roof rack will increase fuel consumption by as much as 5% in highway driving.
  • Even an empty roof rack can increase consumption by 1%. If the carrier is not attached to the vehicle, remove it when not in use.
  • Avoid “Jack Rabbit” starts, not only do they increase fuel consumption, but are hard on your tires.
  • Anticipating stops and avoiding abrupt stops will decrease fuel consumption and increase the life of your brakes and tires.
  • Avoid unnecessary steering wheel movement since each sideward movement of the tire causes fuel-consuming drag.
  • Maintain a steady speed.
  • Accelerate slowly on gravel or slippery roads.
  • Avoid unnecessary braking.
  • Reviving the engine just before turning off the ignition costs extra fuel and may cause engine damage.
  • Take advantage of rolling resistance rather than heavy braking to help slow you down. This deceleration technique is one of the best for fuel saving.
  • Avoid using the air conditioner at lower speeds.
  • Changing spark plugs regularly can save a lot.

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