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In a word, "tires". Assuming your engine is in good repair, tires have the largest impact on fuel economy. I drive a '96 Dodge Ram 1-ton (not dually) long bed, quad cab, V-10, 6500 lb empty weight, with moderately aggressive M+S tires. I watched my mileage very closely from day 1, and it ran a very consistent 10 mpg. I was trying to juggle the tire air pressure based on recommended pressure, tread wear, and ride quality.
On occasion, I'd load the camper in the back and the horse trailer on the bumper, and run the tire pressure to the max rating on the sidewall. At one point, I failed to let the pressure back down after removing the camper, and left it that way for about two tanks of gas. It "jumped" to 11 mpg, and stayed there for as long as I had the pressure at max. As a sanity check, I dropped it back down to where it was before, and the mileage followed.
Just so you can't say it was because of my driving habits, I did the same to my wife's '04 Durango Hemi when she wasn't looking, and the same thing happened; 18 to 19.8 mpg.
Based on this, I'd say that the change is good for an honest 10% increase as compared to what the factory recommends. As far a adverse tire wear, it's been minimal, and more than offset in the fuel savings. Not only that, but low tire pressure is the main cause of blowouts, since it forces the sidewalls to flex 'way too much. Just ask Ford/Firestone...
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∙ 16y ago
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there is no accesory for that
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A car has to be fuel efficient. It means it has to completely burn the fuel.
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No
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The beetle is a fuel efficient car. 25 in the city and 32 on the highway makes is fuel efficient.
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no if they make cars like that
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It's a more efficient fuel.
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A manual transmission civic is more fuel efficient than an automatic transmission. That goes for just about any car.
What is the more efficient sport car?
The Mazda Miata is very fuel efficent.
What do car design engineers do?
They usually try to make the car they are designing, more fuel efficient, safer, and try to come up with ways to improve the current design.
What are the best priced fuel efficient luxury cars?
When it comes to fuel efficient and luxury cars the best bet is to compare hybrid-engine designs. More and more luxury car companies are now coming out with fuel efficient hybrid-engine designs.
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Any car that is labeled as a "hybrid" is going to be more fuel efficient. Some of the most fuel-efficient cars of 2011 are the Nissan Leaf, the Telsa Roadster, the Chevrolet Volt, the Smart car, the Toyota Prius, and the Honda Civic Hybrid.
What is the most dependable fuel efficient car 2014?
The most dependable fuel efficient car of 2014 is the Ford Focus.
