I just put the first treatment in the fuel tank so at this time there is no way for me to comment. The reason I'm using it is to help prevent the CP4 fuel pump failure in my 2016 Duramax. I guess only time will tell and I don't have a failure
Opti-Lube XL Xtreme Lubricant is the ultimate Diesel Fuel lubricity additive, containing the highest lubricity concentration on the market today with testing to back it up.
XL is also extremely efficient with water and deposit control to keep your fuel system safe and functioning at its peak efficiency.
Designed for use in Ultra Low Sulfur Diesel (ULSD), to improve fuel system efficiency and reliability.