Optimax NO!
Firslty you will only notice the difference in a VVT engine, which only comes on the HGT 2.0. Anyone who has noticed a difference has noticed it psychologically and not in reality.
Secondly, the fuel is crap over time. I have tried it over two 1,000 mile experiments and found that initially the performance was good but then to the end of the final tank the performance had steadily reduced below that of normal unleaded.
Switching back to Esso Super returns the performace after the second fill.
I like, mentioned earlier, use Esso Super all the time in my HGT and standard Esso in the SX.
N