While I have used, and stand behind ZEP, in all the forms mentioned, I just want to say, I LOVE Simple Green EVEN MORE! Just because it has all of the capability of ZEP, but it is also tint-safe [I am unsure if ZEP Citrus is as well, or not] according to them. here are my dilutions I use: 1:1- TOUGH Engine, undercarriage, Wheels, etc. 4or5:1- Normal of the above 10:1- Carpet or tough interior (vinyl/leather) stains 32:1- Glass And that is all from one single bottle, not using a different product for tough stains, carpet, and glass all individually. I usually get a 5-gallon container as I also use it all over my house.