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Old 12-13-2012, 01:51 PM
usaret usaret is offline
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Originally Posted by ctuna View Post
The recommended redline is D6 this is closer in viscosity to the bmw spec and provides
better start up lubrication than a heavy oil. At least that is what I have read and its
what redline says to use in there app. Some were using D4 which is more viscous I believe.
You are exactly right.... D6 is what's recommended but only for ease of shifting at low temperatures. I talked to Redline about this very thing but went with MTL 82,000 miles ago. I've changed it twice since then and I've had zero wear issues. The ZF GS6-37 transmission is splash lubricated so the thicker oil will have no negative effect on "start-up" lubrication.
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