Forever is a long time. If we can't get a vehicle to attain at least a 15% increase in mileage in town we buy the system back from the customer. Gasoline engined vehicles have ECUs that use O2 sensors to adjust the A/F mixture. Some of these computers adjust themselves to the added oxygen from the HHO and do not richen the mixture out. This results in the increase in MPG that we claim. Other vehicles (specially Toyotas) must be regulated with EFIEs. We use Volo chips because they work the first time without having to constantly readjust them. Some vehicles need to have the amount of HHO adjusted or the amount of outside air adjusted to obtain the optimal increase in MPG. This we can figure out within 60 days. If we can't get the claimed mileage increases we buy the system back from the customer for the full price. Once the system is working correctly, it will work without adjustments for at least 4 years- that's the longest time we have had one of our systems installed in any vehicle- it may be longer. We do not sell our products to the public. Our systems are installed only by our trained technicians who must be ASE certified mechanics. To understand better how all this works it is necessary to understand how HHO works in your engine. Please visit our web site and learn how HHO works in gasoline and diesel engines. I don't know of a single company in the world that guarantees their products forever. We warranty our total system for one year and our hydrolysers for 3 years. Currently we have 23 customers who have their systems running for over three years.

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