I own two older Ducati’s, 1996 900SS (carburetors) and 2002 748R (injected). Both low mileage and owned from new. They were off the road for a number of years but recommissioned for the road in 2021. They were recently both running badly and the 748 failed to start due to a fuel issue. They are now both serviced and sorted but the problems were due to lack of use and the Ethanol in petrol (E5/E10, I always used E5). The 900SS needed the carbs put though the ultrasonic cleaner and rebuild kits due to residue , O rings and floats. The 748R needed the fuel hoses in the tank replacing - they had rotted away and a new dry lock connector. I now plan to run both regularly up to temperature. I am also looking at fuel additives but there are so many available on the market. Does anyone have any experience / knowledge of fuel additives and their benefits or not. Many thanks. Bernie.