Recently I've purchased two fuel system cleaners - the Valvoline Max and the Techron concentrate plus. Both used on some days interval.
This is my first FS cleaner use. In the user's manual, it says Nissan does not recommend any additives. But for me wanted something good to restore my lost power and performance.
I felt really my Z runs better just after I put that Valvoline's. Faster response like a new (now hitting 100K miles around) About the Techron no idea yet cuz I just put it hours ago.
Any brand of FS cleaner highly recommended ?? Well.. I tried to ask at the BITOG, but my membership is still pending that I write this post here.