I think I suffer with it to lol

I had a bit of a road trip last week one day took my daughter with me nearly 200 miles in the r33, I didn't know the area and ended up having to fill up with bp ultimate, now I would swear it feels more powerful compared to the shell v power I usually run, but in reality I don't think theres any difference as when I used to use bp I switched to shell as I thought it made the old cossie more powerful lol