S2000 Under The Hood S2000 Technical and Mechanical discussions.

Another Differential Fluid Topic

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Old 05-22-2010, 06:57 AM
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[QUOTE=2003AP1,May 17 2010, 12:09 AM]
10w-30 Mobil Synthetic for the motor oil with a Honda filter.
Old 05-22-2010, 09:09 AM
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Originally Posted by 2003AP1,May 22 2010, 08:42 AM
Would it be a bad idea to use this gear oil? Its relatively cheap, and its made by Honda. It is a Hypoid Gear oil, is the same weight, and it is GL5. Thanks.
Those "Exceeds API service classifications GL-5 and GL-4" quotes always makes me sceptic.
It either meets the API GL-5 spec or it doesn't.
If it does it would say so on the bottle, SAE 80W-90 GL-5

That said, this is most likely the 80W-90 hypoid gear oil Honda Canada suggested to use in the S2000 diff instead of the hard to find OEM recommended SAE 90 oil, because the 80W-90 will flow a little better in the cold.

IMO INDYMAC said it all in his comment about diff oil.

My personal preference in an OEM diff would be SAE 110 or 75W-110 GL-5.
That is the closest to the OEM SAE 90 GL-5 recommended oil in 1999.
And that's a fact

Old 05-22-2010, 07:35 PM
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I just changed my fluids 2 days ago along with the spark plugs. I used

Royal Purple 10w-30
Royal Purple oil filter
Royal Purple MTF
Royal Purple 75w-90
NGK Iridiums

Power seems smoother and the tranny deffenently shifts better now.
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