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  #11  
Old 14-11-2015, 05:25 PM
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I've always run my S50 on 10/60. Had it 10yrs now bought on 90k, done about 50,000miles in it including many many trackdays. Never touched the vanos. [touches wood].
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  #12  
Old 15-11-2015, 11:23 AM
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Some seem to last longer. It's a hit and miss thing.

Still wonder why people put 10w60 in this engine, when no one, certainly not BMW has ever recommanded it.
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  #13  
Old 15-11-2015, 04:26 PM
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Quote:
Originally Posted by MParallel View Post
Some seem to last longer. It's a hit and miss thing.

Still wonder why people put 10w60 in this engine, when no one, certainly not BMW has ever recommanded it.
But BMW will formalise oil recommendations when the engine is in design and pre-production, so this would be early 1990s. The TWS 10/60 was never retro-specified for the S50 per se, but that also doesn't necessarily mean it can't be used. It was for the S54 though, which had a higher rev limit, to try and solve the bearing issue, previously 5/30 - so arguably a larger change in viscosity than an S50 from 5/40 to 10/60.

Certainly in the context of vanos, most failures would have been within warranty for the E36 M3 EVO when the vanos issue reach infamy and they weren't running 10/60...

Last edited by c_w; 15-11-2015 at 04:40 PM.
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  #14  
Old 15-11-2015, 06:41 PM
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10w60 was originally issued for the E39 M5 due to high oil consumption.
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  #15  
Old 16-11-2015, 02:17 PM
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Not sure where that came from! But yes another engine with very wildly different oil specs that strengthens the case of using it in an S50 is not a major issue. M5 went to 5/30 and almost at the same time the M3 went to 10/60 - maybe they swapped due to stock issues

When I first got my car I used to run Mobil 1 0/40 in winter and 10/60 through summer, but now just use 10/60 all year round.
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  #16  
Old 16-11-2015, 07:08 PM
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My local dealer has been using 10/60 on the S50 for years and say its the correct oil to use but I have always thought that they just buy drums of the 10/60 rather than having to buy several different oils?
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  #17  
Old 17-11-2015, 11:36 AM
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My local dealer has been using 10/60 on the S50 for years and say its the correct oil to use but I have always thought that they just buy drums of the 10/60 rather than having to buy several different oils?
Of course. This is how dealers work.

I know dealers that now use the BMW recommanded "Long Life" oil in about every model.

There is a nice article on the internet somewhere from an oil expert named "Oilman" with a very clear explenation.

Of course using 10w60 will not instantly destroy the engine. Neither will Olive Oil. But that doesn't mean it's the best oil.

The only time I would consider using 10w60 is if my car was a dedicated trackcar that never goes below 6000rpm.
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