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Does a hydrogen-on-demand system increase fuel efficiency by 60%? [duplicate]

I recently discovered the "hydrogen on demand" system for increasing gas mileage. From what I understand, the system injects your combustion chambers with hydrogen which increases the amount of fuel ...
12
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1answer
463 views

Are claims about saving power by turning appliances off instead of leaving them in standby accurate?

I keep hearing this argument that if you powered down all the appliances you normally leave on standby (TV, hifi, set top box, DVD/Blu ray player, computer, etc) you'll save nearly £90 a year in ...
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1answer
3k views

Can a Renault Megane drive 1700 km with 1 tank?

source See the above advert which claims that Renault Megane can cover 1700km with one tank. According to this link the Megane model has a fuel tank capacity of 60 Liters. Can the Megane cover 28.3 ...
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4k views

Do gas pods improve fuel efficiency?

I ran into this claim today about detachable car fins, and was wondering if there is any validity to it: about a five percent reduction in drag and corresponding five percent boost in fuel ...