Was wondering what your guys opinions were on these products? I was thinking of adding a bottle of something high quality -- like maybe Redline - to the tank on my 1970 every once in awhile.

Do these cleaners have any noticeable effect on a carburated car? (I've heard they are essential for EFI cars). Or has anyone heard about any damaging effects of using a cleaner/additive?

The Redline bottle says it cleans carbs and fuel lines... so I was just wondering if there's much truth to this.

Thanks a lot for your opinions!

-Stan