Bus Company Keeps Grand Canyon Air Clear With New Technology; Grand Canyon National Park Lodges Uses DriverMax(R) to Cut Pollution and Improve MPG

    GRAND CANYON, Ariz., Sept. 6 One of the nation's oldest
transportation companies has turned to new technology from
Mirenco (OTC Bulletin Board: MREO) to help the environment in one of the
United States' greatest natural wonders.  Grand Canyon National Park Lodges
(GCNPL), which operates a fleet of tour buses in the park, has announced
recent tests that show the company has cut pollution from their buses by an
average of 65% over the past eleven months.  Exhaust data revealed the fleet
had saved nearly $12,000 in fuel and kept 1,720 lbs. of particulate matter out
of the atmosphere.  GCNPL's dramatic reduction of black smoke puts the fleet
well within tough California emissions standards.
    The company is one of the first to use DriverMax(R), a computerized
throttle modulating system that cuts pollution and saves fuel.
    "We're very pleased with what we don't see coming out of our buses," says
Jon Streit, GCNPL executive director of operations.  "It's important,
especially to us, considering that we work in a national park, to protect the
environment."
    GCNPL first tested DriverMax units in October of 2000 and saw emissions
immediately reduced by 74%, eliminating black smoke with projections for fuel
savings of nearly 650 gallons per bus.  This number represents almost 10% of
the average gallons of diesel fuel consumed by an individual bus per year,
according to the APTA Public Transportation Fact Book.
    Developed by Iowa-based Mirenco, Inc., DriverMax technology manages the
throttle of a vehicle in real time to eliminate waste caused by a combination
of natural engine degradation and imprecise driver throttle control.  The
tangible results include minimized emissions, maximized fuel savings and
extended vehicle life, all without a loss of vehicle drivability or power.
After a unit is installed, DriverMax can be reprogrammed to compensate for an
aging engine's tendency to waste fuel.
    "Black smoke equals wasted fuel, it's that simple.  In addition to cutting
pollution, by using DriverMax, Grand Canyon National Park Lodges will be able
to realize savings in fuel costs and other areas of vehicle maintenance," said
Dwayne Fosseen, CEO and chairman of Mirenco.  "Once a company starts regular
testing and charting the numbers, they should be able to recognize other
potential problems a vehicle may have."
    GCNPL provides tours around the south rim of the Grand Canyon to
approximately 250,000 passengers annually.  The rigors on the engine of the
constant starting and stopping lead to engine wear and increased emissions.
DriverMax enables the driver of each tour bus to deliver only the amount of
fuel needed for acceleration.  Excess fuel usage is reduced, eliminating the
majority of the exhaust emissions.  The DriverMax units on the GCNPL fleet
were reprogrammed this month to adjust for such engine wear and tear since
October.
    Grand Canyon National Park Lodges proactive efforts to be environmentally
friendly helped parent company, Amfac, win both a 2001 U.S. Department of
Interior Environmental Achievement Award and Travel Industry Association's
Odyssey Award.
    "This company is very committed to reducing pollution," says Lisa
McNeilly, GCNPL director of environmental health and safety.  "It's right in
our mission statement-increasing the sustainability of natural systems is not
only good business, but the right thing to do."

    About Mirenco
    Mirenco is focused on fuel management -- today and tomorrow.  Consistent
with this focus, Mirenco has patented technologies that work today to reduce
emissions, eliminate excess fuel usage, save money and contribute to a cleaner
environment.  In anticipation of tomorrow's vehicles, Mirenco recently
announced their patent-protected Satellite-to-Throttle(TM) technology.
Application of this technology has produced the world's most intelligent
vehicle throttle positioning and emissions-monitoring system, using GPS to
reduce emissions and save fuel.  Years of Mirenco research has demonstrated
that the majority of exhaust emissions are generated from wasted fuel -- waste
from natural engine degradation and overthrottling.  Mirenco results show that
by precisely managing the delivered fuel to the engine through an onboard
computer or via GPS, their technologies can eliminate the majority of exhaust
emissions and save fuel.  Please contact Mirenco at 800-423-9903 or via e-mail
at info@mirenco.com .  Additional information is available on the company's
website at http://www.mirenco.com

    Some of the statements made in this press release are forward-looking in
nature.  Actual results may differ materially from those projected in
forward-looking statements.  Additional information concerning Mirenco, Inc.
can be found within Mirenco's filings with the Securities and Exchange
Commission.  Statements in this release should be evaluated in light of this
additional information.

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