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.is it good to use hot shots secret diesel extreme, and stiction eliminator, and everyday diesel treatment on my 2017 ecodiesel with 31,000km on it