The common wisdom is not to mix trailer greases. allegedly certain grease is incompatible with other grease and could cause it to break down.
This seems to be one of those mechanical truisms where a lot of people know it but examples of the dire predicted consequences are few and far between if you can find any at all. You would think at some point somebody would have come up with a “don’t mix” list to get a little more specific.
For what it’s worth I’ve mixed grease in all kinds of mechanical applications. It’s basically unavoidable, how can anyone know what kind of grease was used by the OEM? So basically with everybody doing it, you’d think the ditches would be filled with dead trailer and equipment carcasses that died from the dire consequences of grease-mixing. But yet…
IMO way more equipment dies from lack of grease and neglected grease than has ever died from the near-mythical mixed grease breakdown. Grease away.
Grouse