Stop global warming

Sunday, May 25, 2008

Three Laws of Car Fuel Economy

Okay, the price of car fuel is going through the roof. What are we going to do about it? Drive less?--That's a very good way to stop global warming. Not a good way to be at Aunt Martha's picnic this weekend.

We could get a super-efficient car (like mine--gets 65 mpg) or get a super-efficient engine (like the one under development--see the full theory at, but you would probably miss the picnic. How about some ways to really cut the cost of gasoline TODAY?

That brings me to a new set of rules. You might say they are Rogers' Laws of Car Fuel Economy. These were mostly known before. They may not actually work for everybody's car, depending on how the car was engineered. A well-engineered car should follow the rules to a "T."

Here are the rules. By following them, you should be able to cut your fuel costs by 20% or more, starting today!

Three Laws of Car Fuel Economy
Ernest Rogers May, 2008

1. In highway driving, for each 5 mph that you slow down, your mileage will increase by 10%.

2. For any trip with a present average speed of (mph) and fuel consumption of (mpg), if you speed up to save time, the extra fuel you will use can be estimated by—

Extra gallons = (mph /mpg) x (minutes saved /35)

In words, if you divide your normal speed by your usual mpg, then multiply by minutes you want to save (by speeding up) and divide by 35, that’s the amount of extra fuel you can expect to use. It is a handy rule to see the fuel cost for speeding to save time.

3. Very efficient drivers use pedals less and can get 30% better mileage than inefficient drivers.


  • Ernie, I just found your blog. Your results (65mpg) on the beetle are significant.
    I think for the 1st time in American’s history the average driver is now concerned
    with miles per gallon.

    I had heard about a fuel additive that was available outside of the US,
    but wasn't available here, that gave 10-20% increase in MPG along
    with enhanced performance. I had been told it actually paid for itself,
    in other words for each $1.00 you used you saved $2.00-$3.00 at the gas pump.

    I flew to California to meet with company representatives and was able
    to get some of this product and I am conducting my own tests.
    results posted here:
    So far the results are impressive.

    I have since become involved as a distributor, and our company is
    introducing this unique technologically advanced product to the
    North American public in the coming weeks.
    A 2 year study, (2006 - 2008) was just completed with a California government
    fleet and they realized 18.7% increase in MPG and significant emissions reductions.

    We are looking for a few Motivated individuals who would like to become distributors.
    If you have any interest, or if you know someone who might be interested please contact me.
    I would be happy to explain: the product, the company, the compensation plan, etc.

    By Blogger Bruce, at May 26, 2008 at 5:34 AM  

  • I agree that working to achieve a high MPG is great, however it would be great to see your work without the global warming slant.

    By Anonymous Anonymous, at July 8, 2008 at 11:24 AM  

  • Hi Ernie,
    I've been looking at your blog for a while now. Thanks for posting the photos!

    I'm planning to make a replica of your buggie bug wing for my 99 gas (sadly) beetle to install this summer.

    Will let you know how it goes. Would be great to see any tips/info on your wing as well!


    By Blogger Lulu, at July 9, 2008 at 7:15 PM  

  • Good to find this kind of blogs. Join
    SPREAD THE WORD please! We have to take care of our only home, the EARTH.

    By Blogger SouthWest Times, at September 21, 2008 at 12:05 PM  

  • So wait, why aren't you on, or Sounds like with a scangauge, properly inflated tires, and maybe some more aeromods you could be pulling 75 mpg daily.

    By Blogger Nathan, at October 12, 2008 at 12:37 PM  

  • Hey,

    Nice blog. :D
    We must stop global warming!


    By Blogger Sarah, at February 4, 2009 at 5:36 AM  

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    By Anonymous Anonymous, at August 21, 2009 at 1:01 AM  

  • Aloha from Hawaii!
    I've put 18 solar PV panels and 2 solar water panels on my house in Hawaii and I'm saving about $500/month on my power bill. I'm trying to get off the grid by mid 2011. I've saved over 5000lbs of CO2 according to my Converter.

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    Tony Kawaguchi

    By Blogger Tony in Hawaii, at October 15, 2009 at 12:14 PM  

  • It is a wonderful idea to reduce the car commuting...stopping is a difficult proposition but there are destinations that could be reached via other transports or taken to healthy walking.
    manhattan dryer vent cleaning

    By Blogger mikesac, at October 31, 2010 at 11:39 PM  

  • Oh, you do the math. But since we experience fuel hikes often, there's an urgency for us to spend our oil wisely. And before you get a car, you should look at the engine quality and the mileage that you can benefit from it. Drive safely and don't forget to do the (proper) math! :D

    Carson Wininger

    By Blogger Carson Wininger, at July 29, 2011 at 10:50 AM  

  • Many countries and nations in the world that wasted energy from nature such as solar energy, sea water and the energy can be recycled. They also do not treat waste properly when garbage and waste could be alternative energy. I really like your blog. Hopefully we can prevent global warming for future generations to come.

    By Blogger Komang Setiabudi, at March 2, 2013 at 9:45 PM  

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