Is it good in your eyes? Some have rave reviews on using everything and anything but it depends on what you put your mind to. I'm sure a product with a cetane boost could help with a cleaner burn and a little lubricity won't hurt.......
Yes, it's okay. I mix a combination of Archoil's AR6200 (4 oz) & Hot Shot's EDT (12 oz) and use 2 0z to each tankful. I've never heard or read where an additive was harmful.