I talked to and got this email from the guy named Mike at CP that answered my questions. Kendall Full Synthetic 5w-30 motor oil use to have the HT-06 certification and now it has no mention of that spec but mentions Dexos 1 instead. Why has the HT-06 certification been removed? Also, Conoco Phillips makes Trop Artic synthetic blend as well 76, is this the same as Kendall with Liquid Titanium or do they have completely different additive packages? Also, what base stock does Kendall use for their full synthetic? Thank you for your time. Answers: Our latest formulations do not boast the HT-06 spec because we cannot get formal approval from Honda for the slight formulation changes that we made. The reason for this is that Honda's testing facility was destroyed recently via natural disaster. Once their facility is back up, we fully expect to obtain formal approval with no problems. The Phillips products and the Kendall products are VERY similar. However, the Kendall line is the only one that we feature our "liquid titanium" additive in. A full synthetic motor oil can be composed of group III, IV, or V base stocks to be considered full synthetic.