Re: XD-50 or XD-100 in my 2002 Ficht?
XD100 was not designed for Ficht engines, it was designed for Etecs. You can program an Etec to use XD100 and it will use less. If you use it in a Direct Injection engine of the vintage 2002, it will use just as much XD100 as XD50, which will become quite expensive. Stick with XD50, that engine was designed for it. Besides, D.I.s are dirty machines by their nature. Stick with decarbing, the oiling pump on a D.I. is also not as sophisticated as an Etec, so it will still get gummed with oil deposits. Comparing a D.I. to an Etec is like comparing modern man to a Neanderthal.