Well I am confused, whats the difference between "Synthetic" and "synthetic Formula".
As far as I know, the synthetic formula are the semi-synthetics although ZIC call them synthetic as well obviously to fool the customers.
If you look at the viscosity, which I just checked at the ZIC website, which is showing difference of about 10 centistroke between Zic UP and ZIC 5000, which does for a same grading oil means different oil base.
And, for arguments sake, if we believe that it is synthetic, how can you recommend a synthetic oil to a guy without asking him how old is your car and which oil has been used previously?
It could be a 20 years old engine who had only breathed mineral oil all its life.
Btw, whats YUBASE technology?