Welcome to ecomodder.
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Originally Posted by BBrown7888
Right now I do them in my CTS-V which gets about 20 MPG on premium
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Does your car require premium fuel ?
If not, try regular and see how much less MPG you get.
It probably won't be worth the price.
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I'm think about starting with an '88-91 honda CRX (I dont have my heart set on this so if there is a better choice let me know)
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It's a good car as a base for a high-MPG vehicle.
Another one is the original Honda Insight, though they are relatively expensive to buy.
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Completely gutting the car to reduce the weight as much as possible.
replace the front bumper and side skirts with flat plastic.
Fabricate flat hub caps
fabricate rear wheel covers
Lower the ride height
"Boat Tail"
Skid Plate
Skinny, taller tires
Seal all seams
Remove power steering
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Sounds like an AeroCRX in the making, along the lines of the
Aerocivic - Honda Civic modifications for maximum gas mileage - aerocivic.com
If they ever had a lean-burn CRX, try to grab one, or swap the engine for a lean burn Honda engine
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Over time I am also thinking about adding a hydrogen kit.
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We're very skeptical about those around here ...
While you do get a benefit due to better combustion when adding hydrogen to the fuel mixture, making that hydrogen on board is a very, very inefficient process, powered by a very inefficient power source - your engine.