Shell Fuel Save

Moving on from the cold start thread and new picanto's lose in performance. I noticed the same things only when i added a tank of fuel save from shell. I have finally been able to run that down and today fill up with another fuel and i have already noticed an increase in performance. It is not so laggy and more responsive when foot down. I would like to be able to gauge who else has or does not have problems with Shell in the New Picanto.Many thanks. 

Modern cars with lambda sensors are self learning thus should be constantly adjusting themselves to compensate to many variable factors. The manufacturer sets a target lambda in the map and the misture is adjusted to suit constantly and although it is not instant adjustments are constantly updated.

I swear by ShellSave and will not use anything like the cheap stuff that supermarkets offer at a lower price. I have owned a Kia since 1994, first the Pride then two Picantos and now have a week old Picanto 2 Ecodynamic from new. I get really good mileage from filling up with Shell (and being a 78 year old the pension can still afford the £1.40.9 a litre). I have driven with mileage in mind for years and now I am getting 50mpg from the Ecodynamic, even though it meant putting 250 miles on the clock in a week.

My Picanto 1.0 has been run on Shell Fuelsave constantly, apart from one tank of BP just to see if there was any difference, there wasn't.
I have not had any cold start problems either and now the weather has warmed up I'm getting 50-54mpg overall.

My car runs better on tesco fuel, than fuel save. Go figure that one out. With the bad reputation tesco have for fuel. I avoid putting shell in to my picanto and since i have my car runs as sweet as a nut.