It's worth it mate, they said so on 5th Gear lol
Seriously though, I get better economy and a slight just barely noticeable improvement in power using 98ron than 95 and 91. Yes you spend more in fuel but you get a bit further on it, so kind of equals out.
In saying that I still use 20ltr/100, 400km per 80ltr. Yes I know, my poor old clunker needs some love and attention![]()