Don't be afraid of commercially prepared bio; ULSD will deterioate your oring seals too.

Economically it makes little if any sense as its higher priced and less efficient; but it wont hurt anything.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)