Gas Pods for an RV to improve gas milage?

Actually coating your RV with snake oil might improve your mpg better than this product. The 1.3 mpg improvement claim has no reference, if the test vehicle was getting 39MPG this is a 3.3% improvement in mpg. at typical motor home mpg of around 7.5 mpg this would be a very impressive 17% increase. If that were possible every manufacturer would have them as factory installed equipment.