well I have to admit it has quietened down my motor heaps.
Used to be very noisey at idle, very quiet now so yes happy camper
Quiet on hard acceleration as well, redline stuff.
In future I'll use one bottle per 165 ltr
EDIT after reading that link from Fry I have learn't a new word "lubricity" wtf
can someone put it in a sentence and make some sense.
@ HL looks like its OK for the bigger diesels as well