List of different MPG % improvements and more..!!

[abently]

http://api.org/news-and-media/docs/~...chnologies.pdf

Published Sept, 2013

Appendix A - Pg 125

A few numbers I found interesting below...

14 CR technology = 6.0%
Improved Lubricating Oil 5W-20 = 0.5%
Weight Reduction by 5% = 3.3%
Weight Reduction by 10% = 6.5%
Weight Reduction by 15% = 9.6%
Rolling Resistance Reduction by 10% = 2.2%
Rolling Resistance Reduction by 20% = 4.4%
Drag Reduction by 10% = 1.8%
Drag Reduction by 20% = 3.5%
Alternator Improvements = 0.5%
Electric water pump = 0.5%
Idle Stop (advanced) = 2.5%
Fast engine warm-up = 0.5%

Discuss...

[RustyLugNut]

I especially like the analysis of major manufacturers and their directions and possible success.

[Jyden]

Originally Posted by abently

http://api.org/news-and-media/docs/~...chnologies.pdf

Published Sept, 2013

Appendix A - Pg 125

A few numbers I found interesting below...

14 CR technology = 6.0%
Improved Lubricating Oil 5W-20 = 0.5%
Weight Reduction by 5% = 3.3%
Weight Reduction by 10% = 6.5%
Weight Reduction by 15% = 9.6%
Rolling Resistance Reduction by 10% = 2.2%
Rolling Resistance Reduction by 20% = 4.4%
Drag Reduction by 10% = 1.8%
Drag Reduction by 20% = 3.5%
Alternator Improvements = 0.5%
Electric water pump = 0.5%
Idle Stop (advanced) = 2.5%
Fast engine warm-up = 0.5%

Discuss...

Interesting paper. Looks like (nothing new) that the US industry are years behind the EU and Japaneese car producers.
In the numbers you list above, I have to question the low % from drag reduction and the high % fra weight reduction, as we ecomodders again and again has proven that areo thrumps weight when it comes to FE.
We do they end up with the total opposite (and wrong) conclution?

[RustyLugNut]

Originally Posted by Jyden

Interesting paper. Looks like (nothing new) that the US industry are years behind the EU and Japaneese car producers.
In the numbers you list above, I have to question the low % from drag reduction and the high % fra weight reduction, as we ecomodders again and again has proven that areo thrumps weight when it comes to FE.
We do they end up with the total opposite (and wrong) conclution?

When the test cycle has a certain amount of acceleration involved, mass will be more heavily weighted.

Also, they pointed out that the aerodynamic changes would be minimal. Improvements include greater use of under-body treatments, wheel covers and variable grill blocks. Nothing dramatic was thought to be marketable.

[Jyden]

Originally Posted by RustyLugNut

Also, they pointed out that the aerodynamic changes would be minimal. Improvements include greater use of under-body treatments, wheel covers and variable grill blocks. Nothing dramatic was thought to be marketable.

I belive this is fear for the unknow among the industry.... Areodynamic cars with good milage could be far more popular to the people than the industri thinks.

With this kind of fear/ feetdragging it will take decades to get fuel effecint cars. Besides - Areo is by far the cheapest way to get FE for the industry, at I "only" involves changing the bodywork from one shape to an other, which is same prices for any model, as it only has to be made to the moulds from the beginning.

[nemo]

In addition, efforts are underway to define a new, lower viscosity,
0W-16 oil for release later this year.

Think what that will do for oil change discussions.

Thanks for posting.

[RustyLugNut]

Originally Posted by Jyden

I belive this is fear for the unknow among the industry.... Areodynamic cars with good milage could be far more popular to the people than the industri thinks.

With this kind of fear/ feetdragging it will take decades to get fuel effecint cars. Besides - Areo is by far the cheapest way to get FE for the industry, at I "only" involves changing the bodywork from one shape to an other, which is same prices for any model, as it only has to be made to the moulds from the beginning.

But much of the fear is rooted in the buying public. If the public won't buy an aerodynamically efficient car shape, the manufacturers will not produce and sell it. The aero-reworking of our car bodies may be more incremental over the next 12 years but it does not look like it will be dramatic. However, market dynamics such as markedly higher fuel costs could change that. Predictions are only as good as their base assumptions.

I look at the Xprize winning Edison VLC and see beauty and efficiency. The general public sees a way-out trinket. It is beyond their comprehension to drive such a car on a daily basis. However, when fuel supplies force the issue, the car will be seen on it's merits and not in comparison to what people consider "traditional" designs.

[oldtamiyaphile]

Originally Posted by Jyden

I have to question the low % from drag reduction and the high % fra weight reduction, as we ecomodders again and again has proven that areo thrumps weight when it comes to FE.
We do they end up with the total opposite (and wrong) conclution?

This only applies if you're a hypermiller and never brake. For the average gas/brake driver, weight is important at least in stop go traffic.

[NeilBlanchard]

After the efficiency of the drivetrain, aero drag is huge. At just 28-30MPH, it is 50% of the load on the drivetrain. When the drivetrain is low(er) efficiency, then weight plays a bigger role in stop and go situations, than if the drivetrain is high(er) in efficiency and/or if the driving is faster than 30MPH much of the time.

[chefdave]

Hi
when ford replaced the cortina in uk with the serria sales bombed. no one was ready for the big change. serria was years head in aerodyamics and was quoted as 27% more efficent than eqvilent cortina. seems as radical change takes years for public to accept as everyday normality.