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  1. #1
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    Motul 75w140 for quaife ?

    During my Quaife install, my installer used motul 75w140.
    The diff is dead silent, no whine, no clunk, perfect backlash.

    Here's my current concern:
    1. motul 75w140 is not exactly OEM viscosity, i think OEM is 75w90. but i did say i do autox often and rarely road course. the thicker oil should be better for heavy duty application right? what is the downside? poor MPG ?

    2. it's not the NS variance, so it does have friction modifier. how bad is this on a Quaife? do i need to change to NS asap or can i let it be for 1k miles and change it to NS then? or does it matter at all?

    what are your 2 cents from your experience?

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    bump

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

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    For gear type LSDs you can use either NS (no friction modifier) or oil with friction modifiers. For clutch type LSDs, the clutch packs rely on the friction modifiers in the oil, and need to use an oil containing the correct additives only. Gear type can use either oil, clutch type needs friction modifiers.

    People on e90post have run 75w140 and no real complaints. After seeing my 75w90 burn up in the small housing due to heat, I actually meant to try 75w140 myself. Maybe I'll pick some up today.

  4. #4
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    Thanks for the bump sticky.
    Thanks for the 2cents Tzu, maybe i'll keep the 75w140 and see what ill effects it does in 1000miles.

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