Fuel efficiency?

Question

Is it true that driving on constant speed increases the fuel efficiency of the car. If we r driving on high or low speed, will it consume more fuel? What are the t*t bits to use fuel efficiently?

Answer 1

yes constant speeds are better and staying between 2 and 3 thousand revs as higher and lower revs use more fuel.  air conditioning and using things like lights, wipers etc use more fuel.  on the motorway if you stay behind a lorry that is more fuel efficient as your not getting wind - it will just go straight over you.  60mph is more efficient that 70mph as well!

Answer 2

As a general rule, it is better to drive at a constant speed.

The most efficient way to drive is to briskly accelerate, and then coast to a low speed, then repeat.  Unfortunately, that doesn't work when you have a lot of traffic.  Driving at a constant speed is better than accelerating and BRAKING a lot.  It CAN be better than changing your speed a lot depending how you change speed...which basically means it usually is better.  

If you drive above a certain speed, your fuel economy will drop quickly.  If you drive BELOW a certain speed, your fuel economy will ALSO drop.  There's this plateau of fuel efficiency for most cars, and the beginning and end of that plateau is different from car to car.

YES, 55 MPH FALLS WITHIN THIS PLATEAU.

The simplest way to get better fuel economy is to just have a light touch on the gas and a light touch on the brake.  Just remember you don't want to accelerate too fast (or too slow) and you want to brake as little as is safe.  If you're smart, you'll figure out how to achieve that goal in every situation.

Answer 3

reading a some book...

best fuel ecomy for

diesel 1600-1900

petrol1900-2200

my car 60litre and does 330kilometres... :(