The Valvoline range of greases includes products specially designed for use in automotive, heavy-duty, marine and industrial equipment. Developed using the highest quality base stocks and the latest additive technology, Valvoline greases provide superior lubrication properties. Unique mixed-complex soap structures are used in Sienna grease and dipperstick grease, to provide the ultimate protection against wear and corrosion, even under the most severe conditions.
Greases are consistent lubricants formed from lubricating oil, thickener and additives. Structure of lubricating greases
Determines high and low temperature grease behavior, dropping point and pumpability, and grease service life. According to the base oil(s) used, greases can be mineral or synthetic.
Produces grease structure by fastening base oil, determines behavior against water, gives consistency, determines flow abilities and helps in production of lubricating film. Depending on the thickener used, greases can be soap and non-soap. Soap thickeners used can be metal soaps (lithium), complex metal soaps (aluminium, lithium, calcium, sodium) and as non-soap thickeners organic and inorganic solids (bentonite, bentone, polyurea, sylica, etc.) are used.
Creates properties that base greases do not have, as well as improve desired properties and minimize undesired properties. The most common are anti-wear additives, extreme pressure additives, corrosion inhibitors and adhesive additives.
The NLGI grade
The NLGI grade is a widely used classification for lubricating greases. It was established by the National Lubricating Grease Institute, in the U.S. Greases are classified in one of nine grades based on their consistency.
>> NLGI #000 Fluid grease, almost a heavy gear oil; NLGI #00 Fluid; NLGI #0 Very soft; NLGI #1 Soft; NLGI #2 Moderately soft; NLGI #3 Soft to hard; NLGI #4 Semi hard; NLGI #5 Hard; NLGI #6 Very hard, block grease
NLGI Grades 000 to 1 are used in applications requiring low viscosity, such as enclosed gear drives operating at low speeds, open gearing and central lubrication systems. Grades 0, 1 and 2 are used in highly loaded gearing. Grades 1 through 4 are often used in rolling contact bearings, where grade 2 is the most common.