I am the last person in the world to fall for or try gimmicky things.
![[Linked Image]](https://tm-img.com/images/2026/05/24/add.jpeg)
This was recommended by my proper engineering garage where I go for Morgan MOT's as the emissions on the 27 year old Plus 8 were close despite the Italian tune up. When he speaks I listen..
So yesterday I brimmed the tank and chucked the 400ml bottle in and the difference is noticeable in performance.
I did the same with the Sport and no change.
Just wondering if this is worth trying on those mucky Plus 4 models of a few years back.