Ever since I can remember Shell's V Power (or whatever they called is way back when) always gave a noticeable increase in performance in both cars and bikes. Bikes especially.

(MMM... filling up with Shell for an summer evening hoon when the air is cool and dense )

Although I have not tried Tesco's Momentum my self a lot of people I know have noticed the performance benefits and better MPG with vehicles ranging from sporty stuff to daily drivers