When selecting a high temperature lubricant there are many factors to consider!

Selecting a high temperature lubricant is not merely a case of looking at the viscosity rating (for example the 20W50 rating of a multigrade oil): The type of base stock, that constitutes about 80% of the oil bulk, plays a vital role in determining the temperature that the oil can operate at.

It’s common knowledge that when selecting a high temperature lubricant synthetic oils are more stable at higher temperatures and don’t oxidise as readily.