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satiety
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Joined: Dec 30, 2009
Posts: 18

PostPosted: Tue Jan 05, 2010 1:26 am Reply with quote Back to top

Hmm, I learned a few things. Like, I had no idea the air in my tires could affect my gas mileage!
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sindhu
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Joined: Dec 24, 2009
Posts: 52

PostPosted: Sat Jan 09, 2010 10:32 am Reply with quote Back to top

To save gas in your gas u have to drive at a constant speed preferably high speed....
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FRE
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Joined: Oct 05, 2008
Posts: 79
Location: Albuquerque NM

PostPosted: Sat Jan 09, 2010 2:44 pm Reply with quote Back to top

Not high speed!!

As you increase the speed above 50 mph or so, fuel consumption increases very rapidly. That's because the power required to overcome air resistance increases with the cube of the speed, i.e., if the speed is doubled, the power required to overcome air resistance is 8 times greater!! Although the efficiency of the engine increases with speed, the power required to overcome air resistance increases much faster.

The exact speed at which the car achieves its greatest fuel mileage depends on the car. Generally, it would be somewhere between 35 mph and 50 mph and at speeds greater than 50 mph, the air resistance rapidly increases.

Up through 1954, the air resistance of cars gradually decreased as cars became more aerodynamic. However, beginning in 1954 and 1955, that changed. For styling reasons, car manufacturers put eyelids over the headlights and had other projecting ledges which greatly increased air resistance. Then, sometime in the 1960s, car design became more sensible and more aerodynamic. Now cars are intentionally designed to be aerodynamic for fuel efficiency reasons, so the penalty for driving at high speeds is less than it was at one time. But, the fuel mileage penalty for high speed driving still exists; one cannot escape the laws of physics.
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sriram
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Joined: Jan 12, 2010
Posts: 41

PostPosted: Tue Jan 12, 2010 10:35 pm Reply with quote Back to top

Yes I agree with you...To save your gas you have to maintain a constant medium speed....Preferably 60-70 kmph....
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Julianna
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Joined: Jan 23, 2010
Posts: 33

PostPosted: Sat Jan 30, 2010 2:25 pm Reply with quote Back to top

mmmm..... I do appreciate these tips, I have an acquaintance who always blames her poor gas mileage on the car! lololo I guess something should be accountable for her acceleration, deceleration, slam on brakes, low air in tires mentality! I believe she should switch to a bicyle or she will not survive this price of gas! lololo I am sending her a link to these tips. Smile
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FRE
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Joined: Oct 05, 2008
Posts: 79
Location: Albuquerque NM

PostPosted: Sat Jan 30, 2010 8:25 pm Reply with quote Back to top

Julianna wrote:
mmmm..... I do appreciate these tips, I have an acquaintance who always blames her poor gas mileage on the car! lololo I guess something should be accountable for her acceleration, deceleration, slam on brakes, low air in tires mentality! I believe she should switch to a bicyle or she will not survive this price of gas! lololo I am sending her a link to these tips. Smile


Both the car and the driver are important. You can't get good fuel mileage with an inefficient car regardless of how you drive it, but the driver can reduce the degree of inefficiency.
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tony12
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Joined: Feb 03, 2010
Posts: 18

PostPosted: Wed Feb 03, 2010 10:46 am Reply with quote Back to top

For a good mileage cars every aspects comes under considerations. Engine tires, and of course gas. Saving gas can be done by brake free driving in long drives.
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