For over 20 years, and millions of satisfied customers, Dura Lube® has been a dependable name in automotive chemicals. As part of your regular basic maintenance, using Dura Lube® products can help your engine run better and longer.

SR3® Technology is a revolutionary  molecular formula that is attracted to metal and bonds to metal surfaces. SR3® is an advanced chemistry for lubrication and metal protection to help prevent metal to metal heat and friction. SR3® is a non viscous chemistry designed to work in all types of engines, transmissions (excluding CVTs) or other mechanical devices - providing a quieter and smoother operation.