The "PLUS" is for the extra additives above and beyond the normal additive package found in ordinary racing oils. This true high performance lubricant was especially developed to protect top fuel engines.
Big power also means higher cylinder pressure and increased load on critical engine components. The key to preventing dangerous metal-to-metal wear often comes down to viscosity.
Joe S. from Davenport, Iowa switched from Water Wetter to Lucas Super Coolant and now his Nissan 240Z runs 10 degrees cooler than ever before
I just want to tell you what a great product your Super Coolant is! I used to add Water Wetter to my 240Z's radiator, but everytime I changed the antifreeze I found a brown gunk. I've been using your Super Coolant for over a year now and the system is spotlessly clean -- and the car runs about 10 degrees cooler now. I'm really glad I found your product and have already told both car clubs that I'm in about your product.