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Antifoam additives work because they are dispersed in the oil. They are not dissolved, but are suspended as insoluble particles. Because of this, it is possible for the antifoam additives to aggregate and settle out of the oil over time. Exactly how long that takes depends on how well dispersed...

There's really no disadvantage to a high dropping point. If your application is reaching the dropping point, it means your grease is losing structure and oil. It's not going to reform properly upon cooling. All greases will thin out somewhat during operation and thicken when they aren't under...

Based on their SDS, it looks like a simple lithium soap grease with ZDDP. Probably a GC-LB grease will get the job done in terms of stability and wear protection. If the Stihl grease is a thinner consistency than a typical NLGI #2 GC-LB, you may have to cut back with some oil to match the feel...

I believe that very low levels of moisture are usually sufficient to keep the graphite working. From what I've seen, a significant difference in friction shows up only under vacuum conditions. Graphite is also more thermally stable, as noted by others, and less expensive.

CKE is referring to ISO 6743-6 CKE classification, which really just means it is a mineral oil with antioxidants, rust inhibitors, and friction modifiers. You probably want to avoid oils with a lot of active sulfur, which can attack bronze, so automotive gear oils might not be your best bet. I...

From what I've seen, most marine greases are either lithium complex thickeners with added polymers for water resistance, or calcium sulfonate thickeners that have some inherent water resistance. The lithium thickeners would probably be stickier, but the calcium sulfonate will probably have less...

Most of the super high VI hydraulic oils are based on the MIL-PRF-5606 specification for aviation hydraulics. In order to meet those low-temperature requirements, the base oil is usually a low viscosity naphthenic oil, heavily thickened with viscosity index improver. Naphthenics have a greater...