THIS STUFF REALLY WORKS. WE CAN PROVE IT. Trusted by professionals and grown in popularity over the last 20 years by word-of-mouth recommendations alone, we thought it was about time we put our money where our mouth is and show how it has been proven over and over that Mean Green WORKS BETTER ON TOUGH GREASE & GRIME. PERFORMANCE STUDIES SHOW: MEAN GREEN OUT CLEANS OTHER PRODUCTS! Mean Green Super Strength was put to the test versus other brands. It consistently beats the other national brands on tough grease, grime, soils and motor oil and does it for a lower price.