Improved engine efficiency boosts fuel economy, increases horsepower and is

Improved engine efficiency means cleaner air for all.

All creatures need a healthy earth.

environmentally friendly.  Mileageman1 water vapor induction is simple, straight forward, inexpensive and it works.  Mileageman1 has thousands of satisfied customers worldwide.  Mileageman1 can be beneficial for everyone with a naturally aspirated, gasoline powered vehicle.




The BMW information can be found at the end in references.

Mileageman1 can help you get the benefits that BMW feel are so beneficial that they have plans to incorporate water vapor on their production cars.

Where does Milageman1 fit into the development of water vapor for increased fuel economy and boosts in horsepower? We have to go back in time 48 years to find the answer.

1967: Larry R. Miller designs his first Mileageman1 and installs it on the family car. The results were so impressive he made a few upgrades and began using it on his race car and tow car.

Miller went on to be the Northwest Region Sports Car Club of America High Points driver of the Year and win 8 class championships in 11 years of SCCA, IMSA and ICSCC road racing. Miller also won multiple local and regional drag race titles.

Miller was in the import and high performance automotive parts and service business and installed the Mileageman1 system on customers race cars, both road race and drag race, high performance street cars, tow cars and for customers whose only interest was increasing fuel economy, longer engine life and lowered maintenance costs.

Miller’s business was the #1 import and high performance, non-dealer in the state for 7 straight years. Miller retired from car racing, sold his businesses, retired in 1979 and sailed to Hawaii. Retirement is boring for some people. Miller went back in business in 1981 and has been in various businesses from videography to professional masters athlete to freelance writer to building and upgrading rental properties, organic gardening, teaching fly fishing and more.

In 2002 Miller began teaching How-To classes on building and installing the Mileageman1 system. He also had a video produced and began selling it as a DVD on the internet. Shipping DVDs all over the world proved difficult, and expensive for the customer.

In 2005 the Mileageman1 system became a downloadable PDF and has been sold to customers in every major part of the world except Greenland, including an island in the Indian Ocean.

Of the thousands sold, only three customers have ever asked for a refund. 10%, 1 in 10, requests for refunds on an item sold on the internet is considered good. Mileageman1 has a return request rate of 1 in 2000 or less.

Everything that Miller has sold through stores or on the internet is 100% guaranteed.

You can Boost Horsepower, Increase Miles Per Gallon and Remove Engine Carbon Buildup with the Mileageman1 system…GUARANTEED.

And, To Get an Increase in Horsepower, Better Fuel Economy and Remove Engine Carbon, All You Have To Do is: Just Add Water.

Installation is simple, so simple in fact that an 80 year old woman did the installation herself when her friend failed to show up to help. See the testimonials. Mileageman1 requires no special tools or expertise to install on most cars, trucks and vans. All the items needed can be purchased at most hardware stores or on the internet and for under $30.00. You may have most or all the items needed lying around the house or your shop. All necessary parts are detailed in the PDF.

To download the PDF, simply select the PayPal buy now button below, or read on for more information.

Mileageman1 Direct download PDF 19.95 USD


BMW says their system increases fuel economy by 8%. Mileageman1 has never had any feedback that mileage increases were less than 15% after the first 1000 miles, required for the internal engine parts to be cleaned and the computer to make the necessary adjustments.

In order to increase miles per gallon, boost horsepower and extend engine life, you need to remove carbon from the engine’s combustion chamber, valves and exhaust system and Mileageman1 water vapor induction does that.

Before going further, let me state the four principals I’ve used to judge the value of the innovations and products I have sold since first going into business in 1967. They have to be SIMPLE, STRAIGHT FORWARD, INEXPENSIVE AND WORK. Simple meaning, anyone with a basic skill in the field can do it. Straight forward meaning, a degree from some authority isn’t necessary to build and use it. Inexpensive meaning, many of the parts required can be purchased locally or may already be on hand. Work meaning, even if all the other criteria are met, if it doesn’t work, it’s useless and not worth selling.

Back in 1967 when I first went into business, a gallon of premium, high octane gas was less than a buck. I was actively racing cars, building race engines, working with 11 others to maintain their races cars (they did some of the prep and maintenance themselves) and we were towing race cars on trailers lots of miles to races. Paying big bucks every month for fuel took a large chunk out of our profits even with the price per gallon as low as it was. I was road racing in SCCA, IMSA and ICSCC in short races, competing in endurance races and doing local/regional drag racing for advertisement purposes.

Besides wanting to lower the monthly fuel bill, I surmised if I could increase our fuel economy in the race cars, we could go farther between pit stops and that would give us a competitive edge in the endurance races. With those objectives in mind, I started researching and developing different methods that would accomplish those goals.

I looked at the fuel additives on the market, did testing on most and came to the conclusion that after the price of the additive was factored into the equation, I was trading dollars on most and losing money on others.

I replaced the carburetor on our tow van, rejetted it and replaced the automatic choke with a manual choke. That helped a little but I still wanted to increase the race car mileage and, with those changes, the tow car increase was less than I would have liked.

During my research I found that water, if delivered in the right way and the proper amount to the engine, was said to increase fuel economy and horsepower. I wanted to know why it worked that way and delved deeper into my research. Here’s a brief explanation about what I found.

Water slows the flame propagation across the combustion chamber and does that by raising octane ratings. Octane boosters you buy do the same thing with chemicals, chemicals cost money and pollute the environment. Water did neither so I began doing tests on injecting and inducting water into the engine.

After a few dozen different systems were tried and scrapped, I came up with one that was passive, required no switches, valves, injectors or special parts to make it work. The first on the road, in real life tests were done on our family car and then the tow vehicle, a one ton 350 cid Chevrolet van.

An increase in HP when towing was noticeable almost immediately. The mileage increase was negligible in the beginning but slowly crept up and peaked out after about 1000 miles. I wanted to know what was going on inside the engine and did a combustion chamber inspection using a flexible tool that allowed me to see inside, through the spark plug hole, without removing the cylinder head. What I found was almost zero carbon, both hard and soft types that can cause hot spots in the combustion chamber and preignition.

The increase in MPG and HP was also due to the increased octane rating, the van was a pre-computer model, and I was able to advance the timing 10 degrees from the factory spec’s without any preignition/detonation (aka pinging in US english, pinking in English english). The fuel was also able to get a more complete burn because there was no carbon to interfere with the combustion chamber turbulence and none in the exhaust system to impede the flow of the exhaust. In the beginning, the milage was 8 mpg, empty or towing. After all the modifications, including the carburetor change and replacing the automatic choke with a manual choke, I got a consistent 12 mpg towing trailers with race cars and 14-15 on the road and around town. Next was the race car test.

We had a 8 hour race coming up in British Columbia so I installed a MM1 system on the enduro-car then put the car on the chassis dynamometer to set the mixture, timing and other adjustments. Even though the engine was clean inside, or I suspected it was, I was able to advanced the timing beyond anything previously possible. When we got to the race course, which I had raced with the same car using the same engine, gear ratio, tires, etc., everything was the same as the last time we raced there , I was surprised at the added HP and lower lap times. So were my competitors.

A couple of other drivers asked, “What did you do? You were never able to pull away from me out of the corners like that before?” I told them I had made a few minor changes and didn’t elaborate. I did notice that there were quite a few “onlookers” from other teams that came to the tech area when we were being inspected for safety and class rules. The car was protested once at Seattle International Raceway but was found to be legal.

I used the system on the tow cars and race cars for 11 years of professional race car driving. I had also put a copy of the same system on our personal family cars with the same increases in HP and MPG.

I retired from racing, sold my businesses and sailed to Hawaii. I put a system on our car while living there and one on a customer’s car who was a drag racer. His performances improved and others wanted to know what he was doing. He didn’t tell them and neither did I. During the Hawaii years, I got divorced and remarried, sold the auto body parts business I had started, my new wife sold her organic farm and we sailed back to the Pacific Northwest.

When we were living in NE Oregon, I found a 1949 Dodge one ton flatbed truck in a farmers field. I replaced the old flathead 6 cylinder with a 318 V-8 out of a Chrysler that had a 2bbl carburetor and automatic. After that was finished I had a lot of restoration work done. The power was good but I was disappointed with the mpg. I installed the Mileageman1 on the truck and both HP and MPG increased. While living in NM I met a man whose son had rolled his 240Z. He still had most of the engine parts which included a set of side draft Hitachi SU carburetors. I made a special manifold and put them on the truck. There was a slight increase in both HP and MPG but the biggest bonus was the oohs and awes the truck got when I took it to car shows. Most people thought the carburetors were some type of fuel injection.

Fast forward to 2002. I was still using the same basic system I had developed back in 1967-68 and we had gotten a Nissan pick, actually two, from a wrecking yard. I took the best parts and made a nice King Cab plus used parts that were left to make a small trailer. The pickup model was EPA rated at 21-22 mpg.

I was building our house and we drove the pickup for a few months before I had time to put the Mileageman1 system on it and were getting the same as the EPA rating. A thousand or so miles after installing the MM1 system our city and country average mileage was 28-29 and on long trips we were getting in the low to mid-thirties. And, we had a significant power increase that allowed us to cruise over some mountain passes in 5th gear that we had had to use 4th and, at times when hauling a load, even 3rd gear. The Nissan is a 1984 and has only very basic, early computer analytics and I was able to manually advance the ignition timing 12 degrees from factory spec’s. I cover how to manually advance timing on older cars in the MM1 PDF. On OBD2 computer cars, the computer does all the work for you from fuel monitoring to timing adjustments and makes it a lot simpler and easier. How to speed up the computer changes are covered in the PDF.

Mileageman1 Direct download PDF 19.95 USD

Fast forward again to the present. We still have the Nissan, I just went out and looked at the odometer and we have 326,456.8 miles on the truck and it still runs great and gets fantastic mileage. During the winter months it gets cold where we live and the water sometimes freezes in the container. If it stays frozen for any period of time, our mileage drops.

Last summer I did some race walking races and kept track of the mileage on the trips. On one trip I had to go over 8 mountain passes, four going and four returning. 35 mpg was the average for the trip.

Even when gas prices are low the savings are significant and, over the years, we have saved thousands of dollars, maybe tens of thousands. Driving is still fun and the boost in HP is an added bonus.

Since 1967, I have installed MM1 systems or sold thousands of downloads for the systems. Of the three customers who asked for their money back: One said he hadn’t received the download. I never got an undeliverable message but refunded his money. Another said it was too complicated. Not two weeks prior I had an 80 old woman email me telling me she had installed it by herself and it was working great. I refunded his money. The last one ordered the PDF and sent an email the next morning saying it hadn’t increased his MPG or HP. The instructions state that it will take 1000 miles or more to clean the carbon and begin seeing results. I refunded his money.

For years, backyard experts have said that water vapor won’t increase MPG or HP, BWM has proven them wrong as have many thousands of Mileageman1 customers.

The world is full of experts who have never tried something or done any research on their own but are convinced they know the answers. If you doubt that water vapor can really increase HP and MPG, go to wikipedia and search “water injection engines” and read the various articles in that category. You’ll find the Germans were using water in their fighter planes before and during WW2 to increase horsepower, extend cruising range and raise the ceiling limits (how high they could fly). They increased their horsepower from 500 to 2000 and they were kickin’ butt until we found out what they were doing.

The Wikipedia information is about water injection which needs pumps, computers and other expensive equipment to work. MM1 is an induction system and requires none of that equipment.

MM1 works with carburetors, manual timing, fuel injection, OBD2 computer systems and OBD1 if the installer understands that system’s short comings.

The MM1 system can be placed under the hood, in the trunk of a car or in the bed of a pickup. It has also been successfully used on stationary engines i.e. irrigation water pumps, etc.

MM1 is versatile, easy to use and install, even an 80 year old with no mechanical background can do it.

Mileageman1 Direct download PDF 19.95 USD

Here are a few customer testimonials.

I can tell you that the mileage after driving about 75 miles went from 18 avg to 22.5 with mainly city driving. That is about a 25% increase. The car also has great power. I always ran premium fuel as recommend by BMW. I put in regular today and the car still runs fantastic.
Mark A. Florida.

This is my favorite: My friend told me he would help me install your Mileageman1 but he never came by. I put it on my car by myself and it works great. I’m an 80 year old woman and proud of my accomplishment.
Janet B. New Mexico.

I have put about 1500 miles on my Nissan 1984 300ZX since installing the Mileageman system and have seen a boost in horsepower and increase in miles per litre. David J. British Columbia.

I bought a new auto and was disappointed with the fuel economy. Your Mileageman system works well, has easy to follow instructions and the gain in fuel economy has already paid for the download and parts. James C. United Kingdom

I was concerned that increasing MPG would make my pickup difficult to drive when in Phoenix traffic. I’m glad I decided to take the leap. No problems in traffic and I have gotten good increases in miles per gallon and power both in town and on the open road. Gary W. Arizona

Unfortunately, I lost a lot of testimonials when I changed website servers.

One customer told me he had flown Corsairs off of carriers during the Korean war and they used water to boost the HP. He said they were loaded with so much ordinance that they would never be able to get off the carrier deck without it. Another customer told me he was a B52 mechanic in Vietnam and they used water for the same reason.

Moonshiners, during the prohibition years in the US, used a somewhat similar system to outrun the “revenuers.”

Some years ago, I did a lot of modifications to a friend’s car that he drove on the street and used for drag racing. I also added the MM1 system. During a conversation he told me he was driving across the Burnside bridge in Portland, OR when he came to an emission check point, and had no way to avoid it. He said he knew he was going to fail the test. When the inspector came back after analyzing the exhaust he told my friend, “You passed with flying colors. Your car tested way below normal for this model.”

An investment of $27.00 for the downloadable PDF and a small investment in parts to build the Stage 4 MM1 system, probably $10 to $15, maybe less depending on where you buy the parts and what you already have, can save you thousands of $$ in fuel costs both now and in the years ahead plus increase the HP and extend engine life by cleaning out carbon from the inside of the engine. You can easily swap the Mileageman1 system from one to another if you buy a new car.

The PDF includes information on a hydrogen system that I used for a short period. I quit using hydrogen because, unless I charged the batteries that ran the system using solar power, the draw on the charging system lowered the MPG in the process, and it was a trade off or loss. I included the information with pictures so you can make up your mind if it is worth the extra time and money to you.

To buy the Mileageman1 system in downloadable PDF format, select the buy now button below and you’ll be taken to PayPal. As soon as PayPal processes your purchase and sends me a confirmation, I will send it out by email. I broke the PDFs down into multiple parts because some people’s email service can’t take all the information in one unit.

Mileageman1 Direct download PDF 19.95 USD