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      12-18-2012, 01:41 AM   #43
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Drives: 2006 Monaco Blue 330i zsp
Join Date: Nov 2012
Location: 19382 Pa

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Originally Posted by kiwi29 View Post
Has anyone considered using full synthetic oil stabilizers in the diff? Seems weird to ask but just throwing it out there. And does the oil need to be full synthetic? I see a lot of brands stating full syn. And some not mentioning it at all. As with all things used in the car, its better to ask than to mess something up and then ask. I was planning on using mobil 1 gear oil at 75w-90 full synthetic, any thoughts?
make sure it is synthetic. We could argue about brands all day but synthetic oil is more stable than dino oil. they do better in extreme heat and cold. if you did use cheaper dino oil i would say the drain interval would be much shorter so it wouldn't be that much of a savings, and why risk it.