I recently purchased a 2011 Jetta SportWagen TDI and am wondering what fuel additive I should use (if any) to help improve lubricity. I've seen lots of people say the Optilube XPD works wonders and they quote the Spicer fuel study as evidence. I've had good experience with RLI's Bio-Plus in my gas vehicles so I'm wondering if their Bio-Power is worthwhile for diesel.
Any feedback or suggestions greatly appreciated!
Any feedback or suggestions greatly appreciated!