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I know synthetic oils have a higher boiling point, but what is it? And does anyone know if tests have been done on synthetic oil boiling points at 10,000 feet in altitude. I use the 5W50 on a project at 10,000 feet and I believe my oil is foaming/boiling due to lack of pressure. Does anyone have insight?
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Originally posted by BIGjay:
I know synthetic oils have a higher boiling point, but what is it? And does anyone know if tests have been done on synthetic oil boiling points at 10,000 feet in altitude. I use the 5W50 on a project at 10,000 feet and I believe my oil is foaming/boiling due to lack of pressure. Does anyone have insight?
I don't have any specific info, but I would consider the reply regarding water contamination, although you should find a milky color. My personal experience with synthetic engine oils and their volatility is that Amsoil is more stable with lower consumption over time in a leak free, mechanically sound engine than Mobil1. I've used it since 1984. Back then they made a AvOil in the weight you mentioned, but I didn't find it on their website recently.

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