Since using vpower nitro plus my engine check light has come in. I have plugged it in and apparently it's an 02 sensor. Could be complete coincidence but thought I would put it out there and see if there are others who have a light on but haven't made the connection till I bring it up.
What do you all think?

 

coincidence

http://www.importcarparts.co.uk/part...var=0&dc=&gen=

 

My car has had an occasional misfire at idle with Shell's new crap.

Changed to Tesco 99, and no more misfire.