It's advice I've read from Karmakanix (VW specialists) in Berkeley CA: Always run an additive in diesel fuel for DPF-equipped vehicles. Using a cetane booster means the fuel has better combustion characteristics and will more thoroughly burn in the cylinders, constantly reducing the soot load in the DPF. It prolongs the life of the DPF with fewer regen cycles to go through.I'm hesitant to run additives since I haven't had it confirmed that they are 100% OK to run in these
I have no idea whether this advice is good, but it's out there.
Customers should know that Karmakanix advises the continuous usage of diesel additives such as Stanadyne. Aside from lubricity issues that can cause total system failure due to metal flake from failed pumps, these additives also reduce the overall amount of soot generated. This will clearly increase the service life of the Diesel Particulate Filter.