[first time 5er]

I manage a 19,000,000 fleet of heavy equipment and have extensive training in the teir 4 diesel engines. These system are very much like electronic fuel injection in the auto industry. Not much lubricity in gasoline so I don't believe lubricity is an issue in today's engines. In older mechanical pump and injector engines maybe but ultra low sulfur diesel has been around for a while. I would be more concerned with bacteria growth in biodiesel fuel. I think those of you that don't use you TV much should use additives that kill bacteria build up. Our research indicated that is the major issue. Not an problem if you drive regularly. As for additives only needed if your fuel is sitting for a month or more. our motto is " Its only as good for the first tank full" i don't use anything in my truck as we drive it regularly. Regular maintenance is best