I have personally used it in a 94 Dodge Ram 1500 A 1979 GMC all 4 of my snowmobiles and in our 4wheeler as well as my parents caravan. All had improved gas mileage, better power, and ran smoother. An the 79 GMC with almost 250,000 miles quit smoking and has not smoked in another 30,000.
Volvo Technology Corporation officially approves XADO Atomic oil in grades 15W-40 SL/CI-4 and 10W-40 SL/CI-4. These motor oils are recommended by Volvo to be applied when VDS-2 requirements are found. Volvo Corp has recommended these oils for Volvo serviced cars under warranty and Volvo serviced cars in which no warranty exist.
The problem is most do not understand what XADO does or how it does it and they think its like the other junk in the past that has not worked and was not based on the same technology.
Go read some of the other forums where people have used it and the results they have gotten before you listen to those that have not.