78 mpg
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From: Santa Monica-SoCal
78 mpg
http://www.edmunds.com/insideline/do/Featu...photopanel..2.*
does that mean if we drive at <40 mph on the freeway, we'll get better mileage?
does that mean if we drive at <40 mph on the freeway, we'll get better mileage?
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From: Tulsa, OK
Freaks. As long as they stay out of my way. I can't wait until this becomes more mainstream and I'm having to dodge soccer moms going down the highway in the left lane speeding up and slowing down in their SUV's trying to get that elusive 20 MPG.
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There approaches a certain speed where the amount of forward momentum is countered by aerodynamic drag. Typically this speed is around 55mph - 60mph in 'modern' cars although i STRONGLY believe this figure has changed as of late due to
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
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From: Ventura, California, USA
Originally Posted by vishnus11,Jun 5 2008, 02:22 PM
There approaches a certain speed where the amount of forward momentum is countered by aerodynamic drag. Typically this speed is around 55mph - 60mph in 'modern' cars although i STRONGLY believe this figure has changed as of late due to
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
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From: Powell, OH
Originally Posted by vishnus11,Jun 5 2008, 05:22 PM
There approaches a certain speed where the amount of forward momentum is countered by aerodynamic drag. Typically this speed is around 55mph - 60mph in 'modern' cars although i STRONGLY believe this figure has changed as of late due to
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
Sorry, but there is no way wind resistance at 75 mph is more fuel efficient for a car than at 65 mph or lower speeds.
=====
I use some of the techniques they talk about in the article, just not to the extreme, where I would hold up traffic or drive well below posted speed limits. I usually drive at the speed limit or 5-10 above, depending on traffic. Just driving the speed limit (cruise on or manually holding the speed constant) makes a notable difference (approximately 10%) in your mpg, according to my car's computer.
As a result, I get 28-32 mpg in my A4 2.0T going to and from work in a mix of city and hwy driving. You really have to be disiplined about it and if I get caught in a lot of traffic, of course, the mpgs go down considerably. I can say the techniques work according to my instant mpg readout and the avg mpg, the car's onboard computer tracks. My record mpg set in the Avant is 38 mpg avg on a 12 mile drive home from a friends house one evening where I had two stops and did not exceed 50 mph (avg 40 mph), coasting where possible and s l o w l y accelerating.
I don't do it all the time, but sometimes it's a good game to pass the time on the 30-40 minute commute.
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From: Oregon City, OR
Hmmm, maybe this is why there have been so many people pissing me off on the roads around here lately. Nothing like some car taking 3 miles after a light to get up to 35mph in a 45 zone to start your day with a sparkle.
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From: Palm Harbor, FL
Originally Posted by vishnus11,Jun 5 2008, 02:22 PM
There approaches a certain speed where the amount of forward momentum is countered by aerodynamic drag. Typically this speed is around 55mph - 60mph in 'modern' cars although i STRONGLY believe this figure has changed as of late due to
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
- adoption of 6,7 and even 8 speed gearboxes that allow super tall gearing at hwy speeds
- lower drag coefficients. Car like the Prius, GT-R sport 0.27cd drag coefficients.
I would think that driving at 40mph would result in lower efficiency than at 55mph
There are SPECIAL cases where certain vehicles operate more efficiently at slightly higher speeds. It is a well known documented fact that the S2000 is more fuel efficient at high hwy speeds 75-80mph than at lower hwy speeds 60-65mph. This is due to the fuel map leaning out slightly, just before the engine hits VTEC. Prelude owners have noticed the same phenomenon.
Conclusion - there is no hard and fast rule. Certain cars will get optimum hwy milage at specific speeds.
Theoretically, a car gets its best gas mileage in the highest gear without lugging the engine. Usually that comes at around 35-55mph in most cars. There are exceptions, but that is the general rule and it has been well documented.
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From: In the heart of the USSA!
Originally Posted by overst33r,Jun 5 2008, 08:41 PM
The S2000 phenomenon generally applies to the early AP1 models.
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Originally Posted by MrClean,Jun 5 2008, 04:58 PM
Sorry, but there is no way wind resistance at 75 mph is more fuel efficient for a car than at 65 mph or lower speeds.
=====
I use some of the techniques they talk about in the article, just not to the extreme, where I would hold up traffic or drive well below posted speed limits. I usually drive at the speed limit or 5-10 above, depending on traffic. Just driving the speed limit (cruise on or manually holding the speed constant) makes a notable difference (approximately 10%) in your mpg, according to my car's computer.
As a result, I get 28-32 mpg in my A4 2.0T going to and from work in a mix of city and hwy driving. You really have to be disiplined about it and if I get caught in a lot of traffic, of course, the mpgs go down considerably. I can say the techniques work according to my instant mpg readout and the avg mpg, the car's onboard computer tracks. My record mpg set in the Avant is 38 mpg avg on a 12 mile drive home from a friends house one evening where I had two stops and did not exceed 50 mph (avg 40 mph), coasting where possible and s l o w l y accelerating.
I don't do it all the time, but sometimes it's a good game to pass the time on the 30-40 minute commute.
Its a fact - S2000s, especially early AP1 models get slightly better hwy mileage at 75-80mph than at 65mph. Pull your head out of your ass, and do some research before you cry BS.
