Shell has also introduced a new Oil Helix Ultra (Grey container). You can try that one. The filter sold by honda is locally made and costs 150, but I think u can use that if u change it with each oil change.
According to the specifications on Helix Plus(Blue)container, this is not suitable for older engines. So what do u think, should I discontinue using Helix Blue and switch to the CNG Oil or the Helix Super(yellow)? The car in question is 7 years old and was converted to CNG around five months back.